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8sa1-gcc/gcc/ada/sem_prag.adb
Robert Dewar ac9e991846 exp_prag.adb (Expand_Pragma_Common_Object): Use a single Machine_Attribute pragma internally to implement the user pragma. 
2006-10-31  Robert Dewar  <dewar@adacore.com>

	* exp_prag.adb (Expand_Pragma_Common_Object): Use a single
	Machine_Attribute pragma internally to implement the user pragma.
	Add processing for pragma Interface so that it is now completely
	equivalent to pragma Import.

	* sem_prag.adb (Analyze_Pragma, case Obsolescent): Extend this pragma
	so that it can be applied to all entities, including record components
	and enumeration literals.
	(Analyze_Pragma, case Priority_Specific_Dispatching): Check whether
	priority ranges are correct, verify compatibility against task
	dispatching and locking policies, and if everything is correct an entry
	is added to the table containing priority specific dispatching entries
	for this compilation unit.
	(Delay_Config_Pragma_Analyze): Delay processing
	Priority_Specific_Dispatching pragmas because when processing the
	pragma we need to access run-time data, such as the range of
	System.Any_Priority.
	(Sig_Flags): Add Pragma_Priority_Specific_Dispatching.
	Allow pragma Unreferenced as a context item
	Add pragma Preelaborable_Initialization
	(Analyze_Pragma, case Interface): Interface is extended so that it is
	now syntactically and semantically equivalent to Import.
	(Analyze_Pragma, case Compile_Time_Warning): Fix error of blowups on
	insertion characters.
	Add handling for Pragma_Wide_Character_Encoding
	(Process_Restrictions_Restriction_Warnings): Ensure that a warning
	never supercedes a real restriction, and that a real restriction
	always supercedes a warning.
	(Analyze_Pragma, case Assert): Set Low_Bound_Known if assert is of
	appropriate form.

From-SVN: r118268
2006-10-31 18:57:10 +01:00

11592 lines
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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S E M _ P R A G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This unit contains the semantic processing for all pragmas, both language
-- and implementation defined. For most pragmas, the parser only does the
-- most basic job of checking the syntax, so Sem_Prag also contains the code
-- to complete the syntax checks. Certain pragmas are handled partially or
-- completely by the parser (see Par.Prag for further details).
with Atree; use Atree;
with Casing; use Casing;
with Csets; use Csets;
with Debug; use Debug;
with Einfo; use Einfo;
with Elists; use Elists;
with Errout; use Errout;
with Exp_Dist; use Exp_Dist;
with Hostparm; use Hostparm;
with Lib; use Lib;
with Lib.Writ; use Lib.Writ;
with Lib.Xref; use Lib.Xref;
with Namet; use Namet;
with Nlists; use Nlists;
with Nmake; use Nmake;
with Opt; use Opt;
with Output; use Output;
with Restrict; use Restrict;
with Rident; use Rident;
with Rtsfind; use Rtsfind;
with Sem; use Sem;
with Sem_Ch3; use Sem_Ch3;
with Sem_Ch8; use Sem_Ch8;
with Sem_Ch13; use Sem_Ch13;
with Sem_Disp; use Sem_Disp;
with Sem_Dist; use Sem_Dist;
with Sem_Elim; use Sem_Elim;
with Sem_Eval; use Sem_Eval;
with Sem_Intr; use Sem_Intr;
with Sem_Mech; use Sem_Mech;
with Sem_Res; use Sem_Res;
with Sem_Type; use Sem_Type;
with Sem_Util; use Sem_Util;
with Sem_VFpt; use Sem_VFpt;
with Sem_Warn; use Sem_Warn;
with Stand; use Stand;
with Sinfo; use Sinfo;
with Sinfo.CN; use Sinfo.CN;
with Sinput; use Sinput;
with Snames; use Snames;
with Stringt; use Stringt;
with Stylesw; use Stylesw;
with Table;
with Targparm; use Targparm;
with Tbuild; use Tbuild;
with Ttypes;
with Uintp; use Uintp;
with Urealp; use Urealp;
with Validsw; use Validsw;
with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
package body Sem_Prag is
----------------------------------------------
-- Common Handling of Import-Export Pragmas --
----------------------------------------------
-- In the following section, a number of Import_xxx and Export_xxx
-- pragmas are defined by GNAT. These are compatible with the DEC
-- pragmas of the same name, and all have the following common
-- form and processing:
-- pragma Export_xxx
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, other optional parameters ]);
-- pragma Import_xxx
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, other optional parameters ]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- The internal LOCAL_NAME designates the entity that is imported or
-- exported, and must refer to an entity in the current declarative
-- part (as required by the rules for LOCAL_NAME).
-- The external linker name is designated by the External parameter
-- if given, or the Internal parameter if not (if there is no External
-- parameter, the External parameter is a copy of the Internal name).
-- If the External parameter is given as a string, then this string
-- is treated as an external name (exactly as though it had been given
-- as an External_Name parameter for a normal Import pragma).
-- If the External parameter is given as an identifier (or there is no
-- External parameter, so that the Internal identifier is used), then
-- the external name is the characters of the identifier, translated
-- to all upper case letters for OpenVMS versions of GNAT, and to all
-- lower case letters for all other versions
-- Note: the external name specified or implied by any of these special
-- Import_xxx or Export_xxx pragmas override an external or link name
-- specified in a previous Import or Export pragma.
-- Note: these and all other DEC-compatible GNAT pragmas allow full
-- use of named notation, following the standard rules for subprogram
-- calls, i.e. parameters can be given in any order if named notation
-- is used, and positional and named notation can be mixed, subject to
-- the rule that all positional parameters must appear first.
-- Note: All these pragmas are implemented exactly following the DEC
-- design and implementation and are intended to be fully compatible
-- with the use of these pragmas in the DEC Ada compiler.
--------------------------------------------
-- Checking for Duplicated External Names --
--------------------------------------------
-- It is suspicious if two separate Export pragmas use the same external
-- name. The following table is used to diagnose this situation so that
-- an appropriate warning can be issued.
-- The Node_Id stored is for the N_String_Literal node created to
-- hold the value of the external name. The Sloc of this node is
-- used to cross-reference the location of the duplication.
package Externals is new Table.Table (
Table_Component_Type => Node_Id,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 100,
Table_Increment => 100,
Table_Name => "Name_Externals");
-------------------------------------
-- Local Subprograms and Variables --
-------------------------------------
function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
-- This routine is used for possible casing adjustment of an explicit
-- external name supplied as a string literal (the node N), according
-- to the casing requirement of Opt.External_Name_Casing. If this is
-- set to As_Is, then the string literal is returned unchanged, but if
-- it is set to Uppercase or Lowercase, then a new string literal with
-- appropriate casing is constructed.
function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
-- If Def_Id refers to a renamed subprogram, then the base subprogram
-- (the original one, following the renaming chain) is returned.
-- Otherwise the entity is returned unchanged. Should be in Einfo???
procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
-- Place semantic information on the argument of an Elaborate or
-- Elaborate_All pragma. Entity name for unit and its parents is
-- taken from item in previous with_clause that mentions the unit.
-------------------------------
-- Adjust_External_Name_Case --
-------------------------------
function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
CC : Char_Code;
begin
-- Adjust case of literal if required
if Opt.External_Name_Exp_Casing = As_Is then
return N;
else
-- Copy existing string
Start_String;
-- Set proper casing
for J in 1 .. String_Length (Strval (N)) loop
CC := Get_String_Char (Strval (N), J);
if Opt.External_Name_Exp_Casing = Uppercase
and then CC >= Get_Char_Code ('a')
and then CC <= Get_Char_Code ('z')
then
Store_String_Char (CC - 32);
elsif Opt.External_Name_Exp_Casing = Lowercase
and then CC >= Get_Char_Code ('A')
and then CC <= Get_Char_Code ('Z')
then
Store_String_Char (CC + 32);
else
Store_String_Char (CC);
end if;
end loop;
return
Make_String_Literal (Sloc (N),
Strval => End_String);
end if;
end Adjust_External_Name_Case;
--------------------
-- Analyze_Pragma --
--------------------
procedure Analyze_Pragma (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
Prag_Id : Pragma_Id;
Pragma_Exit : exception;
-- This exception is used to exit pragma processing completely. It
-- is used when an error is detected, and no further processing is
-- required. It is also used if an earlier error has left the tree
-- in a state where the pragma should not be processed.
Arg_Count : Nat;
-- Number of pragma argument associations
Arg1 : Node_Id;
Arg2 : Node_Id;
Arg3 : Node_Id;
Arg4 : Node_Id;
-- First four pragma arguments (pragma argument association nodes,
-- or Empty if the corresponding argument does not exist).
type Name_List is array (Natural range <>) of Name_Id;
type Args_List is array (Natural range <>) of Node_Id;
-- Types used for arguments to Check_Arg_Order and Gather_Associations
procedure Check_Ada_83_Warning;
-- Issues a warning message for the current pragma if operating in Ada
-- 83 mode (used for language pragmas that are not a standard part of
-- Ada 83). This procedure does not raise Error_Pragma. Also notes use
-- of 95 pragma.
procedure Check_Arg_Count (Required : Nat);
-- Check argument count for pragma is equal to given parameter.
-- If not, then issue an error message and raise Pragma_Exit.
-- Note: all routines whose name is Check_Arg_Is_xxx take an
-- argument Arg which can either be a pragma argument association,
-- in which case the check is applied to the expression of the
-- association or an expression directly.
procedure Check_Arg_Is_External_Name (Arg : Node_Id);
-- Check that an argument has the right form for an EXTERNAL_NAME
-- parameter of an extended import/export pragma. The rule is that
-- the name must be an identifier or string literal (in Ada 83 mode)
-- or a static string expression (in Ada 95 mode).
procedure Check_Arg_Is_Identifier (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is an
-- identifier. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is an
-- integer literal. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it has the
-- proper syntactic form for a local name and meets the semantic
-- requirements for a local name. The local name is analyzed as
-- part of the processing for this call. In addition, the local
-- name is required to represent an entity at the library level.
procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it has the
-- proper syntactic form for a local name and meets the semantic
-- requirements for a local name. The local name is analyzed as
-- part of the processing for this call.
procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- locking policy name. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
-- Check the specified argument Arg to make sure that it is an
-- identifier whose name matches either N1 or N2 (or N3 if present).
-- If not then give error and raise Pragma_Exit.
procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- queuing policy name. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Static_Expression
(Arg : Node_Id;
Typ : Entity_Id);
-- Check the specified argument Arg to make sure that it is a static
-- expression of the given type (i.e. it will be analyzed and resolved
-- using this type, which can be any valid argument to Resolve, e.g.
-- Any_Integer is OK). If not, given error and raise Pragma_Exit.
procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a
-- string literal. If not give error and raise Pragma_Exit
procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- valid task dispatching policy name. If not give error and raise
-- Pragma_Exit.
procedure Check_Arg_Order (Names : Name_List);
-- Checks for an instance of two arguments with identifiers for the
-- current pragma which are not in the sequence indicated by Names,
-- and if so, generates a fatal message about bad order of arguments.
procedure Check_At_Least_N_Arguments (N : Nat);
-- Check there are at least N arguments present
procedure Check_At_Most_N_Arguments (N : Nat);
-- Check there are no more than N arguments present
procedure Check_Component (Comp : Node_Id);
-- Examine Unchecked_Union component for correct use of per-object
-- constrained subtypes, and for restrictions on finalizable components.
procedure Check_Duplicated_Export_Name (Nam : Node_Id);
-- Nam is an N_String_Literal node containing the external name set
-- by an Import or Export pragma (or extended Import or Export pragma).
-- This procedure checks for possible duplications if this is the
-- export case, and if found, issues an appropriate error message.
procedure Check_First_Subtype (Arg : Node_Id);
-- Checks that Arg, whose expression is an entity name referencing
-- a subtype, does not reference a type that is not a first subtype.
procedure Check_In_Main_Program;
-- Common checks for pragmas that appear within a main program
-- (Priority, Main_Storage, Time_Slice).
procedure Check_Interrupt_Or_Attach_Handler;
-- Common processing for first argument of pragma Interrupt_Handler
-- or pragma Attach_Handler.
procedure Check_Is_In_Decl_Part_Or_Package_Spec;
-- Check that pragma appears in a declarative part, or in a package
-- specification, i.e. that it does not occur in a statement sequence
-- in a body.
procedure Check_No_Identifier (Arg : Node_Id);
-- Checks that the given argument does not have an identifier. If
-- an identifier is present, then an error message is issued, and
-- Pragma_Exit is raised.
procedure Check_No_Identifiers;
-- Checks that none of the arguments to the pragma has an identifier.
-- If any argument has an identifier, then an error message is issued,
-- and Pragma_Exit is raised.
procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
-- identifier, then an error message is given and Error_Pragmas raised.
procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
-- identifier, then an error message is given and Error_Pragmas raised.
-- In this version of the procedure, the identifier name is given as
-- a string with lower case letters.
procedure Check_Static_Constraint (Constr : Node_Id);
-- Constr is a constraint from an N_Subtype_Indication node from a
-- component constraint in an Unchecked_Union type. This routine checks
-- that the constraint is static as required by the restrictions for
-- Unchecked_Union.
procedure Check_Valid_Configuration_Pragma;
-- Legality checks for placement of a configuration pragma
procedure Check_Valid_Library_Unit_Pragma;
-- Legality checks for library unit pragmas. A special case arises for
-- pragmas in generic instances that come from copies of the original
-- library unit pragmas in the generic templates. In the case of other
-- than library level instantiations these can appear in contexts which
-- would normally be invalid (they only apply to the original template
-- and to library level instantiations), and they are simply ignored,
-- which is implemented by rewriting them as null statements.
procedure Check_Variant (Variant : Node_Id);
-- Check Unchecked_Union variant for lack of nested variants and
-- presence of at least one component.
procedure Error_Pragma (Msg : String);
pragma No_Return (Error_Pragma);
-- Outputs error message for current pragma. The message contains an %
-- that will be replaced with the pragma name, and the flag is placed
-- on the pragma itself. Pragma_Exit is then raised.
procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg);
-- Outputs error message for current pragma. The message may contain
-- a % that will be replaced with the pragma name. The parameter Arg
-- may either be a pragma argument association, in which case the flag
-- is placed on the expression of this association, or an expression,
-- in which case the flag is placed directly on the expression. The
-- message is placed using Error_Msg_N, so the message may also contain
-- an & insertion character which will reference the given Arg value.
-- After placing the message, Pragma_Exit is raised.
procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg);
-- Similar to above form of Error_Pragma_Arg except that two messages
-- are provided, the second is a continuation comment starting with \.
procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg_Ident);
-- Outputs error message for current pragma. The message may contain
-- a % that will be replaced with the pragma name. The parameter Arg
-- must be a pragma argument association with a non-empty identifier
-- (i.e. its Chars field must be set), and the error message is placed
-- on the identifier. The message is placed using Error_Msg_N so
-- the message may also contain an & insertion character which will
-- reference the identifier. After placing the message, Pragma_Exit
-- is raised.
function Find_Lib_Unit_Name return Entity_Id;
-- Used for a library unit pragma to find the entity to which the
-- library unit pragma applies, returns the entity found.
procedure Find_Program_Unit_Name (Id : Node_Id);
-- If the pragma is a compilation unit pragma, the id must denote the
-- compilation unit in the same compilation, and the pragma must appear
-- in the list of preceding or trailing pragmas. If it is a program
-- unit pragma that is not a compilation unit pragma, then the
-- identifier must be visible.
function Find_Unique_Parameterless_Procedure
(Name : Entity_Id;
Arg : Node_Id) return Entity_Id;
-- Used for a procedure pragma to find the unique parameterless
-- procedure identified by Name, returns it if it exists, otherwise
-- errors out and uses Arg as the pragma argument for the message.
procedure Gather_Associations
(Names : Name_List;
Args : out Args_List);
-- This procedure is used to gather the arguments for a pragma that
-- permits arbitrary ordering of parameters using the normal rules
-- for named and positional parameters. The Names argument is a list
-- of Name_Id values that corresponds to the allowed pragma argument
-- association identifiers in order. The result returned in Args is
-- a list of corresponding expressions that are the pragma arguments.
-- Note that this is a list of expressions, not of pragma argument
-- associations (Gather_Associations has completely checked all the
-- optional identifiers when it returns). An entry in Args is Empty
-- on return if the corresponding argument is not present.
function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
-- All the routines that check pragma arguments take either a pragma
-- argument association (in which case the expression of the argument
-- association is checked), or the expression directly. The function
-- Get_Pragma_Arg is a utility used to deal with these two cases. If
-- Arg is a pragma argument association node, then its expression is
-- returned, otherwise Arg is returned unchanged.
procedure GNAT_Pragma;
-- Called for all GNAT defined pragmas to note the use of the feature,
-- and also check the relevant restriction (No_Implementation_Pragmas).
function Is_Before_First_Decl
(Pragma_Node : Node_Id;
Decls : List_Id) return Boolean;
-- Return True if Pragma_Node is before the first declarative item in
-- Decls where Decls is the list of declarative items.
function Is_Configuration_Pragma return Boolean;
-- Deterermines if the placement of the current pragma is appropriate
-- for a configuration pragma (precedes the current compilation unit).
function Is_In_Context_Clause return Boolean;
-- Returns True if pragma appears within the context clause of a unit,
-- and False for any other placement (does not generate any messages).
function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
-- Analyzes the argument, and determines if it is a static string
-- expression, returns True if so, False if non-static or not String.
procedure Pragma_Misplaced;
-- Issue fatal error message for misplaced pragma
procedure Process_Atomic_Shared_Volatile;
-- Common processing for pragmas Atomic, Shared, Volatile. Note that
-- Shared is an obsolete Ada 83 pragma, treated as being identical
-- in effect to pragma Atomic.
procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
-- Common procesing for Convention, Interface, Import and Export.
-- Checks first two arguments of pragma, and sets the appropriate
-- convention value in the specified entity or entities. On return
-- C is the convention, E is the referenced entity.
procedure Process_Extended_Import_Export_Exception_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Form : Node_Id;
Arg_Code : Node_Id);
-- Common processing for the pragmas Import/Export_Exception.
-- The three arguments correspond to the three named parameters of
-- the pragma. An argument is empty if the corresponding parameter
-- is not present in the pragma.
procedure Process_Extended_Import_Export_Object_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Size : Node_Id);
-- Common processing for the pragmass Import/Export_Object.
-- The three arguments correspond to the three named parameters
-- of the pragmas. An argument is empty if the corresponding
-- parameter is not present in the pragma.
procedure Process_Extended_Import_Export_Internal_Arg
(Arg_Internal : Node_Id := Empty);
-- Common processing for all extended Import and Export pragmas. The
-- argument is the pragma parameter for the Internal argument. If
-- Arg_Internal is empty or inappropriate, an error message is posted.
-- Otherwise, on normal return, the Entity_Field of Arg_Internal is
-- set to identify the referenced entity.
procedure Process_Extended_Import_Export_Subprogram_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Parameter_Types : Node_Id;
Arg_Result_Type : Node_Id := Empty;
Arg_Mechanism : Node_Id;
Arg_Result_Mechanism : Node_Id := Empty;
Arg_First_Optional_Parameter : Node_Id := Empty);
-- Common processing for all extended Import and Export pragmas
-- applying to subprograms. The caller omits any arguments that do
-- bnot apply to the pragma in question (for example, Arg_Result_Type
-- can be non-Empty only in the Import_Function and Export_Function
-- cases). The argument names correspond to the allowed pragma
-- association identifiers.
procedure Process_Generic_List;
-- Common processing for Share_Generic and Inline_Generic
procedure Process_Import_Or_Interface;
-- Common processing for Import of Interface
procedure Process_Inline (Active : Boolean);
-- Common processing for Inline and Inline_Always. The parameter
-- indicates if the inline pragma is active, i.e. if it should
-- actually cause inlining to occur.
procedure Process_Interface_Name
(Subprogram_Def : Entity_Id;
Ext_Arg : Node_Id;
Link_Arg : Node_Id);
-- Given the last two arguments of pragma Import, pragma Export, or
-- pragma Interface_Name, performs validity checks and sets the
-- Interface_Name field of the given subprogram entity to the
-- appropriate external or link name, depending on the arguments
-- given. Ext_Arg is always present, but Link_Arg may be missing.
-- Note that Ext_Arg may represent the Link_Name if Link_Arg is
-- missing, and appropriate named notation is used for Ext_Arg.
-- If neither Ext_Arg nor Link_Arg is present, the interface name
-- is set to the default from the subprogram name.
procedure Process_Interrupt_Or_Attach_Handler;
-- Common processing for Interrupt and Attach_Handler pragmas
procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
-- Common processing for Restrictions and Restriction_Warnings pragmas.
-- Warn is False for Restrictions, True for Restriction_Warnings.
procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
-- Common processing for Suppress and Unsuppress. The boolean parameter
-- Suppress_Case is True for the Suppress case, and False for the
-- Unsuppress case.
procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
-- This procedure sets the Is_Exported flag for the given entity,
-- checking that the entity was not previously imported. Arg is
-- the argument that specified the entity. A check is also made
-- for exporting inappropriate entities.
procedure Set_Extended_Import_Export_External_Name
(Internal_Ent : Entity_Id;
Arg_External : Node_Id);
-- Common processing for all extended import export pragmas. The first
-- argument, Internal_Ent, is the internal entity, which has already
-- been checked for validity by the caller. Arg_External is from the
-- Import or Export pragma, and may be null if no External parameter
-- was present. If Arg_External is present and is a non-null string
-- (a null string is treated as the default), then the Interface_Name
-- field of Internal_Ent is set appropriately.
procedure Set_Imported (E : Entity_Id);
-- This procedure sets the Is_Imported flag for the given entity,
-- checking that it is not previously exported or imported.
procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
-- Mech is a parameter passing mechanism (see Import_Function syntax
-- for MECHANISM_NAME). This routine checks that the mechanism argument
-- has the right form, and if not issues an error message. If the
-- argument has the right form then the Mechanism field of Ent is
-- set appropriately.
procedure Set_Ravenscar_Profile (N : Node_Id);
-- Activate the set of configuration pragmas and restrictions that
-- make up the Ravenscar Profile. N is the corresponding pragma
-- node, which is used for error messages on any constructs
-- that violate the profile.
--------------------------
-- Check_Ada_83_Warning --
--------------------------
procedure Check_Ada_83_Warning is
begin
if Ada_Version = Ada_83 and then Comes_From_Source (N) then
Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
end if;
end Check_Ada_83_Warning;
---------------------
-- Check_Arg_Count --
---------------------
procedure Check_Arg_Count (Required : Nat) is
begin
if Arg_Count /= Required then
Error_Pragma ("wrong number of arguments for pragma%");
end if;
end Check_Arg_Count;
--------------------------------
-- Check_Arg_Is_External_Name --
--------------------------------
procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) = N_Identifier then
return;
else
Analyze_And_Resolve (Argx, Standard_String);
if Is_OK_Static_Expression (Argx) then
return;
elsif Etype (Argx) = Any_Type then
raise Pragma_Exit;
-- An interesting special case, if we have a string literal and
-- we are in Ada 83 mode, then we allow it even though it will
-- not be flagged as static. This allows expected Ada 83 mode
-- use of external names which are string literals, even though
-- technically these are not static in Ada 83.
elsif Ada_Version = Ada_83
and then Nkind (Argx) = N_String_Literal
then
return;
-- Static expression that raises Constraint_Error. This has
-- already been flagged, so just exit from pragma processing.
elsif Is_Static_Expression (Argx) then
raise Pragma_Exit;
-- Here we have a real error (non-static expression)
else
Error_Msg_Name_1 := Chars (N);
Flag_Non_Static_Expr
("argument for pragma% must be a identifier or " &
"static string expression!", Argx);
raise Pragma_Exit;
end if;
end if;
end Check_Arg_Is_External_Name;
-----------------------------
-- Check_Arg_Is_Identifier --
-----------------------------
procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_Identifier then
Error_Pragma_Arg
("argument for pragma% must be identifier", Argx);
end if;
end Check_Arg_Is_Identifier;
----------------------------------
-- Check_Arg_Is_Integer_Literal --
----------------------------------
procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_Integer_Literal then
Error_Pragma_Arg
("argument for pragma% must be integer literal", Argx);
end if;
end Check_Arg_Is_Integer_Literal;
-------------------------------------------
-- Check_Arg_Is_Library_Level_Local_Name --
-------------------------------------------
-- LOCAL_NAME ::=
-- DIRECT_NAME
-- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
-- | library_unit_NAME
procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
begin
Check_Arg_Is_Local_Name (Arg);
if not Is_Library_Level_Entity (Entity (Expression (Arg)))
and then Comes_From_Source (N)
then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg);
end if;
end Check_Arg_Is_Library_Level_Local_Name;
-----------------------------
-- Check_Arg_Is_Local_Name --
-----------------------------
-- LOCAL_NAME ::=
-- DIRECT_NAME
-- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
-- | library_unit_NAME
procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Analyze (Argx);
if Nkind (Argx) not in N_Direct_Name
and then (Nkind (Argx) /= N_Attribute_Reference
or else Present (Expressions (Argx))
or else Nkind (Prefix (Argx)) /= N_Identifier)
and then (not Is_Entity_Name (Argx)
or else not Is_Compilation_Unit (Entity (Argx)))
then
Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
end if;
if Is_Entity_Name (Argx)
and then Scope (Entity (Argx)) /= Current_Scope
then
Error_Pragma_Arg
("pragma% argument must be in same declarative part", Arg);
end if;
end Check_Arg_Is_Local_Name;
---------------------------------
-- Check_Arg_Is_Locking_Policy --
---------------------------------
procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Locking_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid locking policy name", Argx);
end if;
end Check_Arg_Is_Locking_Policy;
-------------------------
-- Check_Arg_Is_One_Of --
-------------------------
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
Error_Msg_Name_2 := N1;
Error_Msg_Name_3 := N2;
Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
end if;
end Check_Arg_Is_One_Of;
procedure Check_Arg_Is_One_Of
(Arg : Node_Id;
N1, N2, N3 : Name_Id)
is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= N1
and then Chars (Argx) /= N2
and then Chars (Argx) /= N3
then
Error_Pragma_Arg ("invalid argument for pragma%", Argx);
end if;
end Check_Arg_Is_One_Of;
---------------------------------
-- Check_Arg_Is_Queuing_Policy --
---------------------------------
procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Queuing_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid queuing policy name", Argx);
end if;
end Check_Arg_Is_Queuing_Policy;
------------------------------------
-- Check_Arg_Is_Static_Expression --
------------------------------------
procedure Check_Arg_Is_Static_Expression
(Arg : Node_Id;
Typ : Entity_Id)
is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Analyze_And_Resolve (Argx, Typ);
if Is_OK_Static_Expression (Argx) then
return;
elsif Etype (Argx) = Any_Type then
raise Pragma_Exit;
-- An interesting special case, if we have a string literal and
-- we are in Ada 83 mode, then we allow it even though it will
-- not be flagged as static. This allows the use of Ada 95
-- pragmas like Import in Ada 83 mode. They will of course be
-- flagged with warnings as usual, but will not cause errors.
elsif Ada_Version = Ada_83
and then Nkind (Argx) = N_String_Literal
then
return;
-- Static expression that raises Constraint_Error. This has
-- already been flagged, so just exit from pragma processing.
elsif Is_Static_Expression (Argx) then
raise Pragma_Exit;
-- Finally, we have a real error
else
Error_Msg_Name_1 := Chars (N);
Flag_Non_Static_Expr
("argument for pragma% must be a static expression!", Argx);
raise Pragma_Exit;
end if;
end Check_Arg_Is_Static_Expression;
---------------------------------
-- Check_Arg_Is_String_Literal --
---------------------------------
procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_String_Literal then
Error_Pragma_Arg
("argument for pragma% must be string literal", Argx);
end if;
end Check_Arg_Is_String_Literal;
------------------------------------------
-- Check_Arg_Is_Task_Dispatching_Policy --
------------------------------------------
procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid task dispatching policy name", Argx);
end if;
end Check_Arg_Is_Task_Dispatching_Policy;
---------------------
-- Check_Arg_Order --
---------------------
procedure Check_Arg_Order (Names : Name_List) is
Arg : Node_Id;
Highest_So_Far : Natural := 0;
-- Highest index in Names seen do far
begin
Arg := Arg1;
for J in 1 .. Arg_Count loop
if Chars (Arg) /= No_Name then
for K in Names'Range loop
if Chars (Arg) = Names (K) then
if K < Highest_So_Far then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("parameters out of order for pragma%", Arg);
Error_Msg_Name_1 := Names (K);
Error_Msg_Name_2 := Names (Highest_So_Far);
Error_Msg_N ("\% must appear before %", Arg);
raise Pragma_Exit;
else
Highest_So_Far := K;
end if;
end if;
end loop;
end if;
Arg := Next (Arg);
end loop;
end Check_Arg_Order;
--------------------------------
-- Check_At_Least_N_Arguments --
--------------------------------
procedure Check_At_Least_N_Arguments (N : Nat) is
begin
if Arg_Count < N then
Error_Pragma ("too few arguments for pragma%");
end if;
end Check_At_Least_N_Arguments;
-------------------------------
-- Check_At_Most_N_Arguments --
-------------------------------
procedure Check_At_Most_N_Arguments (N : Nat) is
Arg : Node_Id;
begin
if Arg_Count > N then
Arg := Arg1;
for J in 1 .. N loop
Next (Arg);
Error_Pragma_Arg ("too many arguments for pragma%", Arg);
end loop;
end if;
end Check_At_Most_N_Arguments;
---------------------
-- Check_Component --
---------------------
procedure Check_Component (Comp : Node_Id) is
begin
if Nkind (Comp) = N_Component_Declaration then
declare
Sindic : constant Node_Id :=
Subtype_Indication (Component_Definition (Comp));
Typ : constant Entity_Id :=
Etype (Defining_Identifier (Comp));
begin
if Nkind (Sindic) = N_Subtype_Indication then
-- Ada 2005 (AI-216): If a component subtype is subject to
-- a per-object constraint, then the component type shall
-- be an Unchecked_Union.
if Has_Per_Object_Constraint (Defining_Identifier (Comp))
and then
not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
then
Error_Msg_N ("component subtype subject to per-object" &
" constraint must be an Unchecked_Union", Comp);
end if;
end if;
if Is_Controlled (Typ) then
Error_Msg_N
("component of unchecked union cannot be controlled", Comp);
elsif Has_Task (Typ) then
Error_Msg_N
("component of unchecked union cannot have tasks", Comp);
end if;
end;
end if;
end Check_Component;
----------------------------------
-- Check_Duplicated_Export_Name --
----------------------------------
procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
String_Val : constant String_Id := Strval (Nam);
begin
-- We are only interested in the export case, and in the case of
-- generics, it is the instance, not the template, that is the
-- problem (the template will generate a warning in any case).
if not Inside_A_Generic
and then (Prag_Id = Pragma_Export
or else
Prag_Id = Pragma_Export_Procedure
or else
Prag_Id = Pragma_Export_Valued_Procedure
or else
Prag_Id = Pragma_Export_Function)
then
for J in Externals.First .. Externals.Last loop
if String_Equal (String_Val, Strval (Externals.Table (J))) then
Error_Msg_Sloc := Sloc (Externals.Table (J));
Error_Msg_N ("external name duplicates name given#", Nam);
exit;
end if;
end loop;
Externals.Append (Nam);
end if;
end Check_Duplicated_Export_Name;
-------------------------
-- Check_First_Subtype --
-------------------------
procedure Check_First_Subtype (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if not Is_First_Subtype (Entity (Argx)) then
Error_Pragma_Arg
("pragma% cannot apply to subtype", Argx);
end if;
end Check_First_Subtype;
---------------------------
-- Check_In_Main_Program --
---------------------------
procedure Check_In_Main_Program is
P : constant Node_Id := Parent (N);
begin
-- Must be at in subprogram body
if Nkind (P) /= N_Subprogram_Body then
Error_Pragma ("% pragma allowed only in subprogram");
-- Otherwise warn if obviously not main program
elsif Present (Parameter_Specifications (Specification (P)))
or else not Is_Compilation_Unit (Defining_Entity (P))
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("?pragma% is only effective in main program", N);
end if;
end Check_In_Main_Program;
---------------------------------------
-- Check_Interrupt_Or_Attach_Handler --
---------------------------------------
procedure Check_Interrupt_Or_Attach_Handler is
Arg1_X : constant Node_Id := Expression (Arg1);
Handler_Proc, Proc_Scope : Entity_Id;
begin
Analyze (Arg1_X);
if Prag_Id = Pragma_Interrupt_Handler then
Check_Restriction (No_Dynamic_Attachment, N);
end if;
Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
Proc_Scope := Scope (Handler_Proc);
-- On AAMP only, a pragma Interrupt_Handler is supported for
-- nonprotected parameterless procedures.
if not AAMP_On_Target
or else Prag_Id = Pragma_Attach_Handler
then
if Ekind (Proc_Scope) /= E_Protected_Type then
Error_Pragma_Arg
("argument of pragma% must be protected procedure", Arg1);
end if;
if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
Error_Pragma ("pragma% must be in protected definition");
end if;
end if;
if not Is_Library_Level_Entity (Proc_Scope)
or else (AAMP_On_Target
and then not Is_Library_Level_Entity (Handler_Proc))
then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg1);
end if;
end Check_Interrupt_Or_Attach_Handler;
-------------------------------------------
-- Check_Is_In_Decl_Part_Or_Package_Spec --
-------------------------------------------
procedure Check_Is_In_Decl_Part_Or_Package_Spec is
P : Node_Id;
begin
P := Parent (N);
loop
if No (P) then
exit;
elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
exit;
elsif Nkind (P) = N_Package_Specification then
return;
elsif Nkind (P) = N_Block_Statement then
return;
-- Note: the following tests seem a little peculiar, because
-- they test for bodies, but if we were in the statement part
-- of the body, we would already have hit the handled statement
-- sequence, so the only way we get here is by being in the
-- declarative part of the body.
elsif Nkind (P) = N_Subprogram_Body
or else Nkind (P) = N_Package_Body
or else Nkind (P) = N_Task_Body
or else Nkind (P) = N_Entry_Body
then
return;
end if;
P := Parent (P);
end loop;
Error_Pragma ("pragma% is not in declarative part or package spec");
end Check_Is_In_Decl_Part_Or_Package_Spec;
-------------------------
-- Check_No_Identifier --
-------------------------
procedure Check_No_Identifier (Arg : Node_Id) is
begin
if Chars (Arg) /= No_Name then
Error_Pragma_Arg_Ident
("pragma% does not permit identifier& here", Arg);
end if;
end Check_No_Identifier;
--------------------------
-- Check_No_Identifiers --
--------------------------
procedure Check_No_Identifiers is
Arg_Node : Node_Id;
begin
if Arg_Count > 0 then
Arg_Node := Arg1;
while Present (Arg_Node) loop
Check_No_Identifier (Arg_Node);
Next (Arg_Node);
end loop;
end if;
end Check_No_Identifiers;
-------------------------------
-- Check_Optional_Identifier --
-------------------------------
procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
begin
if Present (Arg) and then Chars (Arg) /= No_Name then
if Chars (Arg) /= Id then
Error_Msg_Name_1 := Chars (N);
Error_Msg_Name_2 := Id;
Error_Msg_N ("pragma% argument expects identifier%", Arg);
raise Pragma_Exit;
end if;
end if;
end Check_Optional_Identifier;
procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
begin
Name_Buffer (1 .. Id'Length) := Id;
Name_Len := Id'Length;
Check_Optional_Identifier (Arg, Name_Find);
end Check_Optional_Identifier;
-----------------------------
-- Check_Static_Constraint --
-----------------------------
-- Note: for convenience in writing this procedure, in addition to
-- the officially (i.e. by spec) allowed argument which is always
-- a constraint, it also allows ranges and discriminant associations.
-- Above is not clear ???
procedure Check_Static_Constraint (Constr : Node_Id) is
--------------------
-- Require_Static --
--------------------
procedure Require_Static (E : Node_Id);
-- Require given expression to be static expression
procedure Require_Static (E : Node_Id) is
begin
if not Is_OK_Static_Expression (E) then
Flag_Non_Static_Expr
("non-static constraint not allowed in Unchecked_Union!", E);
raise Pragma_Exit;
end if;
end Require_Static;
-- Start of processing for Check_Static_Constraint
begin
case Nkind (Constr) is
when N_Discriminant_Association =>
Require_Static (Expression (Constr));
when N_Range =>
Require_Static (Low_Bound (Constr));
Require_Static (High_Bound (Constr));
when N_Attribute_Reference =>
Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
when N_Range_Constraint =>
Check_Static_Constraint (Range_Expression (Constr));
when N_Index_Or_Discriminant_Constraint =>
declare
IDC : Entity_Id;
begin
IDC := First (Constraints (Constr));
while Present (IDC) loop
Check_Static_Constraint (IDC);
Next (IDC);
end loop;
end;
when others =>
null;
end case;
end Check_Static_Constraint;
--------------------------------------
-- Check_Valid_Configuration_Pragma --
--------------------------------------
-- A configuration pragma must appear in the context clause of
-- a compilation unit, at the start of the list (i.e. only other
-- pragmas may precede it).
procedure Check_Valid_Configuration_Pragma is
begin
if not Is_Configuration_Pragma then
Error_Pragma ("incorrect placement for configuration pragma%");
end if;
end Check_Valid_Configuration_Pragma;
-------------------------------------
-- Check_Valid_Library_Unit_Pragma --
-------------------------------------
procedure Check_Valid_Library_Unit_Pragma is
Plist : List_Id;
Parent_Node : Node_Id;
Unit_Name : Entity_Id;
Unit_Kind : Node_Kind;
Unit_Node : Node_Id;
Sindex : Source_File_Index;
begin
if not Is_List_Member (N) then
Pragma_Misplaced;
else
Plist := List_Containing (N);
Parent_Node := Parent (Plist);
if Parent_Node = Empty then
Pragma_Misplaced;
-- Case of pragma appearing after a compilation unit. In this
-- case it must have an argument with the corresponding name
-- and must be part of the following pragmas of its parent.
elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
if Plist /= Pragmas_After (Parent_Node) then
Pragma_Misplaced;
elsif Arg_Count = 0 then
Error_Pragma
("argument required if outside compilation unit");
else
Check_No_Identifiers;
Check_Arg_Count (1);
Unit_Node := Unit (Parent (Parent_Node));
Unit_Kind := Nkind (Unit_Node);
Analyze (Expression (Arg1));
if Unit_Kind = N_Generic_Subprogram_Declaration
or else Unit_Kind = N_Subprogram_Declaration
then
Unit_Name := Defining_Entity (Unit_Node);
elsif Unit_Kind in N_Generic_Instantiation then
Unit_Name := Defining_Entity (Unit_Node);
else
Unit_Name := Cunit_Entity (Current_Sem_Unit);
end if;
if Chars (Unit_Name) /=
Chars (Entity (Expression (Arg1)))
then
Error_Pragma_Arg
("pragma% argument is not current unit name", Arg1);
end if;
if Ekind (Unit_Name) = E_Package
and then Present (Renamed_Entity (Unit_Name))
then
Error_Pragma ("pragma% not allowed for renamed package");
end if;
end if;
-- Pragma appears other than after a compilation unit
else
-- Here we check for the generic instantiation case and also
-- for the case of processing a generic formal package. We
-- detect these cases by noting that the Sloc on the node
-- does not belong to the current compilation unit.
Sindex := Source_Index (Current_Sem_Unit);
if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
Rewrite (N, Make_Null_Statement (Loc));
return;
-- If before first declaration, the pragma applies to the
-- enclosing unit, and the name if present must be this name.
elsif Is_Before_First_Decl (N, Plist) then
Unit_Node := Unit_Declaration_Node (Current_Scope);
Unit_Kind := Nkind (Unit_Node);
if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
Pragma_Misplaced;
elsif Unit_Kind = N_Subprogram_Body
and then not Acts_As_Spec (Unit_Node)
then
Pragma_Misplaced;
elsif Nkind (Parent_Node) = N_Package_Body then
Pragma_Misplaced;
elsif Nkind (Parent_Node) = N_Package_Specification
and then Plist = Private_Declarations (Parent_Node)
then
Pragma_Misplaced;
elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
or else Nkind (Parent_Node)
= N_Generic_Subprogram_Declaration)
and then Plist = Generic_Formal_Declarations (Parent_Node)
then
Pragma_Misplaced;
elsif Arg_Count > 0 then
Analyze (Expression (Arg1));
if Entity (Expression (Arg1)) /= Current_Scope then
Error_Pragma_Arg
("name in pragma% must be enclosing unit", Arg1);
end if;
-- It is legal to have no argument in this context
else
return;
end if;
-- Error if not before first declaration. This is because a
-- library unit pragma argument must be the name of a library
-- unit (RM 10.1.5(7)), but the only names permitted in this
-- context are (RM 10.1.5(6)) names of subprogram declarations,
-- generic subprogram declarations or generic instantiations.
else
Error_Pragma
("pragma% misplaced, must be before first declaration");
end if;
end if;
end if;
end Check_Valid_Library_Unit_Pragma;
-------------------
-- Check_Variant --
-------------------
procedure Check_Variant (Variant : Node_Id) is
Clist : constant Node_Id := Component_List (Variant);
Comp : Node_Id;
begin
if not Is_Non_Empty_List (Component_Items (Clist)) then
Error_Msg_N
("Unchecked_Union may not have empty component list",
Variant);
return;
end if;
Comp := First (Component_Items (Clist));
while Present (Comp) loop
Check_Component (Comp);
Next (Comp);
end loop;
end Check_Variant;
------------------
-- Error_Pragma --
------------------
procedure Error_Pragma (Msg : String) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, N);
raise Pragma_Exit;
end Error_Pragma;
----------------------
-- Error_Pragma_Arg --
----------------------
procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
raise Pragma_Exit;
end Error_Pragma_Arg;
procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
Error_Pragma_Arg (Msg2, Arg);
end Error_Pragma_Arg;
----------------------------
-- Error_Pragma_Arg_Ident --
----------------------------
procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, Arg);
raise Pragma_Exit;
end Error_Pragma_Arg_Ident;
------------------------
-- Find_Lib_Unit_Name --
------------------------
function Find_Lib_Unit_Name return Entity_Id is
begin
-- Return inner compilation unit entity, for case of nested
-- categorization pragmas. This happens in generic unit.
if Nkind (Parent (N)) = N_Package_Specification
and then Defining_Entity (Parent (N)) /= Current_Scope
then
return Defining_Entity (Parent (N));
else
return Current_Scope;
end if;
end Find_Lib_Unit_Name;
----------------------------
-- Find_Program_Unit_Name --
----------------------------
procedure Find_Program_Unit_Name (Id : Node_Id) is
Unit_Name : Entity_Id;
Unit_Kind : Node_Kind;
P : constant Node_Id := Parent (N);
begin
if Nkind (P) = N_Compilation_Unit then
Unit_Kind := Nkind (Unit (P));
if Unit_Kind = N_Subprogram_Declaration
or else Unit_Kind = N_Package_Declaration
or else Unit_Kind in N_Generic_Declaration
then
Unit_Name := Defining_Entity (Unit (P));
if Chars (Id) = Chars (Unit_Name) then
Set_Entity (Id, Unit_Name);
Set_Etype (Id, Etype (Unit_Name));
else
Set_Etype (Id, Any_Type);
Error_Pragma
("cannot find program unit referenced by pragma%");
end if;
else
Set_Etype (Id, Any_Type);
Error_Pragma ("pragma% inapplicable to this unit");
end if;
else
Analyze (Id);
end if;
end Find_Program_Unit_Name;
-----------------------------------------
-- Find_Unique_Parameterless_Procedure --
-----------------------------------------
function Find_Unique_Parameterless_Procedure
(Name : Entity_Id;
Arg : Node_Id) return Entity_Id
is
Proc : Entity_Id := Empty;
begin
-- The body of this procedure needs some comments ???
if not Is_Entity_Name (Name) then
Error_Pragma_Arg
("argument of pragma% must be entity name", Arg);
elsif not Is_Overloaded (Name) then
Proc := Entity (Name);
if Ekind (Proc) /= E_Procedure
or else Present (First_Formal (Proc)) then
Error_Pragma_Arg
("argument of pragma% must be parameterless procedure", Arg);
end if;
else
declare
Found : Boolean := False;
It : Interp;
Index : Interp_Index;
begin
Get_First_Interp (Name, Index, It);
while Present (It.Nam) loop
Proc := It.Nam;
if Ekind (Proc) = E_Procedure
and then No (First_Formal (Proc))
then
if not Found then
Found := True;
Set_Entity (Name, Proc);
Set_Is_Overloaded (Name, False);
else
Error_Pragma_Arg
("ambiguous handler name for pragma% ", Arg);
end if;
end if;
Get_Next_Interp (Index, It);
end loop;
if not Found then
Error_Pragma_Arg
("argument of pragma% must be parameterless procedure",
Arg);
else
Proc := Entity (Name);
end if;
end;
end if;
return Proc;
end Find_Unique_Parameterless_Procedure;
-------------------------
-- Gather_Associations --
-------------------------
procedure Gather_Associations
(Names : Name_List;
Args : out Args_List)
is
Arg : Node_Id;
begin
-- Initialize all parameters to Empty
for J in Args'Range loop
Args (J) := Empty;
end loop;
-- That's all we have to do if there are no argument associations
if No (Pragma_Argument_Associations (N)) then
return;
end if;
-- Otherwise first deal with any positional parameters present
Arg := First (Pragma_Argument_Associations (N));
for Index in Args'Range loop
exit when No (Arg) or else Chars (Arg) /= No_Name;
Args (Index) := Expression (Arg);
Next (Arg);
end loop;
-- Positional parameters all processed, if any left, then we
-- have too many positional parameters.
if Present (Arg) and then Chars (Arg) = No_Name then
Error_Pragma_Arg
("too many positional associations for pragma%", Arg);
end if;
-- Process named parameters if any are present
while Present (Arg) loop
if Chars (Arg) = No_Name then
Error_Pragma_Arg
("positional association cannot follow named association",
Arg);
else
for Index in Names'Range loop
if Names (Index) = Chars (Arg) then
if Present (Args (Index)) then
Error_Pragma_Arg
("duplicate argument association for pragma%", Arg);
else
Args (Index) := Expression (Arg);
exit;
end if;
end if;
if Index = Names'Last then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("pragma% does not allow & argument", Arg);
-- Check for possible misspelling
for Index1 in Names'Range loop
if Is_Bad_Spelling_Of
(Get_Name_String (Chars (Arg)),
Get_Name_String (Names (Index1)))
then
Error_Msg_Name_1 := Names (Index1);
Error_Msg_N ("\possible misspelling of%", Arg);
exit;
end if;
end loop;
raise Pragma_Exit;
end if;
end loop;
end if;
Next (Arg);
end loop;
end Gather_Associations;
--------------------
-- Get_Pragma_Arg --
--------------------
function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
begin
if Nkind (Arg) = N_Pragma_Argument_Association then
return Expression (Arg);
else
return Arg;
end if;
end Get_Pragma_Arg;
-----------------
-- GNAT_Pragma --
-----------------
procedure GNAT_Pragma is
begin
Check_Restriction (No_Implementation_Pragmas, N);
end GNAT_Pragma;
--------------------------
-- Is_Before_First_Decl --
--------------------------
function Is_Before_First_Decl
(Pragma_Node : Node_Id;
Decls : List_Id) return Boolean
is
Item : Node_Id := First (Decls);
begin
-- Only other pragmas can come before this pragma
loop
if No (Item) or else Nkind (Item) /= N_Pragma then
return False;
elsif Item = Pragma_Node then
return True;
end if;
Next (Item);
end loop;
end Is_Before_First_Decl;
-----------------------------
-- Is_Configuration_Pragma --
-----------------------------
-- A configuration pragma must appear in the context clause of
-- a compilation unit, at the start of the list (i.e. only other
-- pragmas may precede it).
function Is_Configuration_Pragma return Boolean is
Lis : constant List_Id := List_Containing (N);
Par : constant Node_Id := Parent (N);
Prg : Node_Id;
begin
-- If no parent, then we are in the configuration pragma file,
-- so the placement is definitely appropriate.
if No (Par) then
return True;
-- Otherwise we must be in the context clause of a compilation unit
-- and the only thing allowed before us in the context list is more
-- configuration pragmas.
elsif Nkind (Par) = N_Compilation_Unit
and then Context_Items (Par) = Lis
then
Prg := First (Lis);
loop
if Prg = N then
return True;
elsif Nkind (Prg) /= N_Pragma then
return False;
end if;
Next (Prg);
end loop;
else
return False;
end if;
end Is_Configuration_Pragma;
--------------------------
-- Is_In_Context_Clause --
--------------------------
function Is_In_Context_Clause return Boolean is
Plist : List_Id;
Parent_Node : Node_Id;
begin
if not Is_List_Member (N) then
return False;
else
Plist := List_Containing (N);
Parent_Node := Parent (Plist);
if Parent_Node = Empty
or else Nkind (Parent_Node) /= N_Compilation_Unit
or else Context_Items (Parent_Node) /= Plist
then
return False;
end if;
end if;
return True;
end Is_In_Context_Clause;
---------------------------------
-- Is_Static_String_Expression --
---------------------------------
function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Analyze_And_Resolve (Argx);
return Is_OK_Static_Expression (Argx)
and then Nkind (Argx) = N_String_Literal;
end Is_Static_String_Expression;
----------------------
-- Pragma_Misplaced --
----------------------
procedure Pragma_Misplaced is
begin
Error_Pragma ("incorrect placement of pragma%");
end Pragma_Misplaced;
------------------------------------
-- Process Atomic_Shared_Volatile --
------------------------------------
procedure Process_Atomic_Shared_Volatile is
E_Id : Node_Id;
E : Entity_Id;
D : Node_Id;
K : Node_Kind;
Utyp : Entity_Id;
procedure Set_Atomic (E : Entity_Id);
-- Set given type as atomic, and if no explicit alignment was
-- given, set alignment to unknown, since back end knows what
-- the alignment requirements are for atomic arrays. Note that
-- this step is necessary for derived types.
----------------
-- Set_Atomic --
----------------
procedure Set_Atomic (E : Entity_Id) is
begin
Set_Is_Atomic (E);
if not Has_Alignment_Clause (E) then
Set_Alignment (E, Uint_0);
end if;
end Set_Atomic;
-- Start of processing for Process_Atomic_Shared_Volatile
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
D := Declaration_Node (E);
K := Nkind (D);
if Is_Type (E) then
if Rep_Item_Too_Early (E, N)
or else
Rep_Item_Too_Late (E, N)
then
return;
else
Check_First_Subtype (Arg1);
end if;
if Prag_Id /= Pragma_Volatile then
Set_Atomic (E);
Set_Atomic (Underlying_Type (E));
Set_Atomic (Base_Type (E));
end if;
-- Attribute belongs on the base type. If the
-- view of the type is currently private, it also
-- belongs on the underlying type.
Set_Is_Volatile (Base_Type (E));
Set_Is_Volatile (Underlying_Type (E));
Set_Treat_As_Volatile (E);
Set_Treat_As_Volatile (Underlying_Type (E));
elsif K = N_Object_Declaration
or else (K = N_Component_Declaration
and then Original_Record_Component (E) = E)
then
if Rep_Item_Too_Late (E, N) then
return;
end if;
if Prag_Id /= Pragma_Volatile then
Set_Is_Atomic (E);
-- If the object declaration has an explicit
-- initialization, a temporary may have to be
-- created to hold the expression, to insure
-- that access to the object remain atomic.
if Nkind (Parent (E)) = N_Object_Declaration
and then Present (Expression (Parent (E)))
then
Set_Has_Delayed_Freeze (E);
end if;
-- An interesting improvement here. If an object of type X
-- is declared atomic, and the type X is not atomic, that's
-- a pity, since it may not have appropraite alignment etc.
-- We can rescue this in the special case where the object
-- and type are in the same unit by just setting the type
-- as atomic, so that the back end will process it as atomic.
Utyp := Underlying_Type (Etype (E));
if Present (Utyp)
and then Sloc (E) > No_Location
and then Sloc (Utyp) > No_Location
and then
Get_Source_File_Index (Sloc (E)) =
Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
then
Set_Is_Atomic (Underlying_Type (Etype (E)));
end if;
end if;
Set_Is_Volatile (E);
Set_Treat_As_Volatile (E);
else
Error_Pragma_Arg
("inappropriate entity for pragma%", Arg1);
end if;
end Process_Atomic_Shared_Volatile;
------------------------
-- Process_Convention --
------------------------
procedure Process_Convention
(C : out Convention_Id;
E : out Entity_Id)
is
Id : Node_Id;
E1 : Entity_Id;
Cname : Name_Id;
Comp_Unit : Unit_Number_Type;
procedure Set_Convention_From_Pragma (E : Entity_Id);
-- Set convention in entity E, and also flag that the entity has a
-- convention pragma. If entity is for a private or incomplete type,
-- also set convention and flag on underlying type. This procedure
-- also deals with the special case of C_Pass_By_Copy convention.
--------------------------------
-- Set_Convention_From_Pragma --
--------------------------------
procedure Set_Convention_From_Pragma (E : Entity_Id) is
begin
-- Ada 2005 (AI-430): Check invalid attempt to change convention
-- for an overridden dispatching operation. Technically this is
-- an amendment and should only be done in Ada 2005 mode.
-- However, this is clearly a mistake, since the problem that is
-- addressed by this AI is that there is a clear gap in the RM!
if Is_Dispatching_Operation (E)
and then Present (Overridden_Operation (E))
and then C /= Convention (Overridden_Operation (E))
then
Error_Pragma_Arg
("cannot change convention for " &
"overridden dispatching operation",
Arg1);
end if;
-- Set the convention
Set_Convention (E, C);
Set_Has_Convention_Pragma (E);
if Is_Incomplete_Or_Private_Type (E) then
Set_Convention (Underlying_Type (E), C);
Set_Has_Convention_Pragma (Underlying_Type (E), True);
end if;
-- A class-wide type should inherit the convention of
-- the specific root type (although this isn't specified
-- clearly by the RM).
if Is_Type (E) and then Present (Class_Wide_Type (E)) then
Set_Convention (Class_Wide_Type (E), C);
end if;
-- If the entity is a record type, then check for special case
-- of C_Pass_By_Copy, which is treated the same as C except that
-- the special record flag is set. This convention is also only
-- permitted on record types (see AI95-00131).
if Cname = Name_C_Pass_By_Copy then
if Is_Record_Type (E) then
Set_C_Pass_By_Copy (Base_Type (E));
elsif Is_Incomplete_Or_Private_Type (E)
and then Is_Record_Type (Underlying_Type (E))
then
Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
else
Error_Pragma_Arg
("C_Pass_By_Copy convention allowed only for record type",
Arg2);
end if;
end if;
-- If the entity is a derived boolean type, check for the
-- special case of convention C, C++, or Fortran, where we
-- consider any nonzero value to represent true.
if Is_Discrete_Type (E)
and then Root_Type (Etype (E)) = Standard_Boolean
and then
(C = Convention_C
or else
C = Convention_CPP
or else
C = Convention_Fortran)
then
Set_Nonzero_Is_True (Base_Type (E));
end if;
end Set_Convention_From_Pragma;
-- Start of processing for Process_Convention
begin
Check_At_Least_N_Arguments (2);
Check_Optional_Identifier (Arg1, Name_Convention);
Check_Arg_Is_Identifier (Arg1);
Cname := Chars (Expression (Arg1));
-- C_Pass_By_Copy is treated as a synonym for convention C
-- (this is tested again below to set the critical flag)
if Cname = Name_C_Pass_By_Copy then
C := Convention_C;
-- Otherwise we must have something in the standard convention list
elsif Is_Convention_Name (Cname) then
C := Get_Convention_Id (Chars (Expression (Arg1)));
-- In DEC VMS, it seems that there is an undocumented feature
-- that any unrecognized convention is treated as the default,
-- which for us is convention C. It does not seem so terrible
-- to do this unconditionally, silently in the VMS case, and
-- with a warning in the non-VMS case.
else
if Warn_On_Export_Import and not OpenVMS_On_Target then
Error_Msg_N
("?unrecognized convention name, C assumed",
Expression (Arg1));
end if;
C := Convention_C;
end if;
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg2);
Id := Expression (Arg2);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg ("entity name required", Arg2);
end if;
E := Entity (Id);
-- Go to renamed subprogram if present, since convention applies
-- to the actual renamed entity, not to the renaming entity.
-- If subprogram is inherited, go to parent subprogram.
if Is_Subprogram (E)
and then Present (Alias (E))
then
if Nkind (Parent (Declaration_Node (E)))
= N_Subprogram_Renaming_Declaration
then
E := Alias (E);
elsif Nkind (Parent (E)) = N_Full_Type_Declaration
and then Scope (E) = Scope (Alias (E))
then
E := Alias (E);
end if;
end if;
-- Check that we are not applying this to a specless body
if Is_Subprogram (E)
and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
then
Error_Pragma
("pragma% requires separate spec and must come before body");
end if;
-- Check that we are not applying this to a named constant
if Ekind (E) = E_Named_Integer
or else
Ekind (E) = E_Named_Real
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("cannot apply pragma% to named constant!",
Get_Pragma_Arg (Arg2));
Error_Pragma_Arg
("\supply appropriate type for&!", Arg2);
end if;
if Etype (E) = Any_Type
or else Rep_Item_Too_Early (E, N)
then
raise Pragma_Exit;
else
E := Underlying_Type (E);
end if;
if Rep_Item_Too_Late (E, N) then
raise Pragma_Exit;
end if;
if Has_Convention_Pragma (E) then
Error_Pragma_Arg
("at most one Convention/Export/Import pragma is allowed", Arg2);
elsif Convention (E) = Convention_Protected
or else Ekind (Scope (E)) = E_Protected_Type
then
Error_Pragma_Arg
("a protected operation cannot be given a different convention",
Arg2);
end if;
-- For Intrinsic, a subprogram is required
if C = Convention_Intrinsic
and then not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
then
Error_Pragma_Arg
("second argument of pragma% must be a subprogram", Arg2);
end if;
-- For Stdcall, a subprogram, variable or subprogram type is required
if C = Convention_Stdcall
and then not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
and then Ekind (E) /= E_Variable
and then not
(Is_Access_Type (E)
and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
then
Error_Pragma_Arg
("second argument of pragma% must be subprogram (type)",
Arg2);
end if;
if not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
then
Set_Convention_From_Pragma (E);
if Is_Type (E) then
Check_First_Subtype (Arg2);
Set_Convention_From_Pragma (Base_Type (E));
-- For subprograms, we must set the convention on the
-- internally generated directly designated type as well.
if Ekind (E) = E_Access_Subprogram_Type then
Set_Convention_From_Pragma (Directly_Designated_Type (E));
end if;
end if;
-- For the subprogram case, set proper convention for all homonyms
-- in same scope and the same declarative part, i.e. the same
-- compilation unit.
else
Comp_Unit := Get_Source_Unit (E);
Set_Convention_From_Pragma (E);
-- Treat a pragma Import as an implicit body, for GPS use
if Prag_Id = Pragma_Import then
Generate_Reference (E, Id, 'b');
end if;
E1 := E;
loop
E1 := Homonym (E1);
exit when No (E1) or else Scope (E1) /= Current_Scope;
-- Note: below we are missing a check for Rep_Item_Too_Late.
-- That is deliberate, we cannot chain the rep item on more
-- than one Rep_Item chain, to be fixed later ???
if Comes_From_Source (E1)
and then Comp_Unit = Get_Source_Unit (E1)
and then Nkind (Original_Node (Parent (E1))) /=
N_Full_Type_Declaration
then
Set_Convention_From_Pragma (E1);
if Prag_Id = Pragma_Import then
Generate_Reference (E, Id, 'b');
end if;
end if;
end loop;
end if;
end Process_Convention;
-----------------------------------------------------
-- Process_Extended_Import_Export_Exception_Pragma --
-----------------------------------------------------
procedure Process_Extended_Import_Export_Exception_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Form : Node_Id;
Arg_Code : Node_Id)
is
Def_Id : Entity_Id;
Code_Val : Uint;
begin
GNAT_Pragma;
if not OpenVMS_On_Target then
Error_Pragma
("?pragma% ignored (applies only to Open'V'M'S)");
end if;
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Def_Id := Entity (Arg_Internal);
if Ekind (Def_Id) /= E_Exception then
Error_Pragma_Arg
("pragma% must refer to declared exception", Arg_Internal);
end if;
Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
if Present (Arg_Form) then
Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
end if;
if Present (Arg_Form)
and then Chars (Arg_Form) = Name_Ada
then
null;
else
Set_Is_VMS_Exception (Def_Id);
Set_Exception_Code (Def_Id, No_Uint);
end if;
if Present (Arg_Code) then
if not Is_VMS_Exception (Def_Id) then
Error_Pragma_Arg
("Code option for pragma% not allowed for Ada case",
Arg_Code);
end if;
Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
Code_Val := Expr_Value (Arg_Code);
if not UI_Is_In_Int_Range (Code_Val) then
Error_Pragma_Arg
("Code option for pragma% must be in 32-bit range",
Arg_Code);
else
Set_Exception_Code (Def_Id, Code_Val);
end if;
end if;
end Process_Extended_Import_Export_Exception_Pragma;
-------------------------------------------------
-- Process_Extended_Import_Export_Internal_Arg --
-------------------------------------------------
procedure Process_Extended_Import_Export_Internal_Arg
(Arg_Internal : Node_Id := Empty)
is
begin
GNAT_Pragma;
if No (Arg_Internal) then
Error_Pragma ("Internal parameter required for pragma%");
end if;
if Nkind (Arg_Internal) = N_Identifier then
null;
elsif Nkind (Arg_Internal) = N_Operator_Symbol
and then (Prag_Id = Pragma_Import_Function
or else
Prag_Id = Pragma_Export_Function)
then
null;
else
Error_Pragma_Arg
("wrong form for Internal parameter for pragma%", Arg_Internal);
end if;
Check_Arg_Is_Local_Name (Arg_Internal);
end Process_Extended_Import_Export_Internal_Arg;
--------------------------------------------------
-- Process_Extended_Import_Export_Object_Pragma --
--------------------------------------------------
procedure Process_Extended_Import_Export_Object_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Size : Node_Id)
is
Def_Id : Entity_Id;
begin
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Def_Id := Entity (Arg_Internal);
if Ekind (Def_Id) /= E_Constant
and then Ekind (Def_Id) /= E_Variable
then
Error_Pragma_Arg
("pragma% must designate an object", Arg_Internal);
end if;
if Has_Rep_Pragma (Def_Id, Name_Common_Object)
or else
Has_Rep_Pragma (Def_Id, Name_Psect_Object)
then
Error_Pragma_Arg
("previous Common/Psect_Object applies, pragma % not permitted",
Arg_Internal);
end if;
if Rep_Item_Too_Late (Def_Id, N) then
raise Pragma_Exit;
end if;
Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
if Present (Arg_Size) then
Check_Arg_Is_External_Name (Arg_Size);
end if;
-- Export_Object case
if Prag_Id = Pragma_Export_Object then
if not Is_Library_Level_Entity (Def_Id) then
Error_Pragma_Arg
("argument for pragma% must be library level entity",
Arg_Internal);
end if;
if Ekind (Current_Scope) = E_Generic_Package then
Error_Pragma ("pragma& cannot appear in a generic unit");
end if;
if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
Error_Pragma_Arg
("exported object must have compile time known size",
Arg_Internal);
end if;
if Warn_On_Export_Import and then Is_Exported (Def_Id) then
Error_Msg_N
("?duplicate Export_Object pragma", N);
else
Set_Exported (Def_Id, Arg_Internal);
end if;
-- Import_Object case
else
if Is_Concurrent_Type (Etype (Def_Id)) then
Error_Pragma_Arg
("cannot use pragma% for task/protected object",
Arg_Internal);
end if;
if Ekind (Def_Id) = E_Constant then
Error_Pragma_Arg
("cannot import a constant", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Has_Discriminants (Etype (Def_Id))
then
Error_Msg_N
("imported value must be initialized?", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Is_Access_Type (Etype (Def_Id))
then
Error_Pragma_Arg
("cannot import object of an access type?", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Is_Imported (Def_Id)
then
Error_Msg_N
("?duplicate Import_Object pragma", N);
-- Check for explicit initialization present. Note that an
-- initialization that generated by the code generator, e.g.
-- for an access type, does not count here.
elsif Present (Expression (Parent (Def_Id)))
and then
Comes_From_Source
(Original_Node (Expression (Parent (Def_Id))))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
"\imported entities cannot be initialized ('R'M' 'B.1(24))",
Arg1);
else
Set_Imported (Def_Id);
Note_Possible_Modification (Arg_Internal);
end if;
end if;
end Process_Extended_Import_Export_Object_Pragma;
------------------------------------------------------
-- Process_Extended_Import_Export_Subprogram_Pragma --
------------------------------------------------------
procedure Process_Extended_Import_Export_Subprogram_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Parameter_Types : Node_Id;
Arg_Result_Type : Node_Id := Empty;
Arg_Mechanism : Node_Id;
Arg_Result_Mechanism : Node_Id := Empty;
Arg_First_Optional_Parameter : Node_Id := Empty)
is
Ent : Entity_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
Formal : Entity_Id;
Ambiguous : Boolean;
Match : Boolean;
Dval : Node_Id;
function Same_Base_Type
(Ptype : Node_Id;
Formal : Entity_Id) return Boolean;
-- Determines if Ptype references the type of Formal. Note that
-- only the base types need to match according to the spec. Ptype
-- here is the argument from the pragma, which is either a type
-- name, or an access attribute.
--------------------
-- Same_Base_Type --
--------------------
function Same_Base_Type
(Ptype : Node_Id;
Formal : Entity_Id) return Boolean
is
Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
Pref : Node_Id;
begin
-- Case where pragma argument is typ'Access
if Nkind (Ptype) = N_Attribute_Reference
and then Attribute_Name (Ptype) = Name_Access
then
Pref := Prefix (Ptype);
Find_Type (Pref);
if not Is_Entity_Name (Pref)
or else Entity (Pref) = Any_Type
then
raise Pragma_Exit;
end if;
-- We have a match if the corresponding argument is of an
-- anonymous access type, and its designicated type matches
-- the type of the prefix of the access attribute
return Ekind (Ftyp) = E_Anonymous_Access_Type
and then Base_Type (Entity (Pref)) =
Base_Type (Etype (Designated_Type (Ftyp)));
-- Case where pragma argument is a type name
else
Find_Type (Ptype);
if not Is_Entity_Name (Ptype)
or else Entity (Ptype) = Any_Type
then
raise Pragma_Exit;
end if;
-- We have a match if the corresponding argument is of
-- the type given in the pragma (comparing base types)
return Base_Type (Entity (Ptype)) = Ftyp;
end if;
end Same_Base_Type;
-- Start of processing for
-- Process_Extended_Import_Export_Subprogram_Pragma
begin
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Ent := Empty;
Ambiguous := False;
-- Loop through homonyms (overloadings) of the entity
Hom_Id := Entity (Arg_Internal);
while Present (Hom_Id) loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- We need a subprogram in the current scope
if not Is_Subprogram (Def_Id)
or else Scope (Def_Id) /= Current_Scope
then
null;
else
Match := True;
-- Pragma cannot apply to subprogram body
if Is_Subprogram (Def_Id)
and then
Nkind (Parent
(Declaration_Node (Def_Id))) = N_Subprogram_Body
then
Error_Pragma
("pragma% requires separate spec"
& " and must come before body");
end if;
-- Test result type if given, note that the result type
-- parameter can only be present for the function cases.
if Present (Arg_Result_Type)
and then not Same_Base_Type (Arg_Result_Type, Def_Id)
then
Match := False;
elsif Etype (Def_Id) /= Standard_Void_Type
and then
(Chars (N) = Name_Export_Procedure
or else Chars (N) = Name_Import_Procedure)
then
Match := False;
-- Test parameter types if given. Note that this parameter
-- has not been analyzed (and must not be, since it is
-- semantic nonsense), so we get it as the parser left it.
elsif Present (Arg_Parameter_Types) then
Check_Matching_Types : declare
Formal : Entity_Id;
Ptype : Node_Id;
begin
Formal := First_Formal (Def_Id);
if Nkind (Arg_Parameter_Types) = N_Null then
if Present (Formal) then
Match := False;
end if;
-- A list of one type, e.g. (List) is parsed as
-- a parenthesized expression.
elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
and then Paren_Count (Arg_Parameter_Types) = 1
then
if No (Formal)
or else Present (Next_Formal (Formal))
then
Match := False;
else
Match :=
Same_Base_Type (Arg_Parameter_Types, Formal);
end if;
-- A list of more than one type is parsed as a aggregate
elsif Nkind (Arg_Parameter_Types) = N_Aggregate
and then Paren_Count (Arg_Parameter_Types) = 0
then
Ptype := First (Expressions (Arg_Parameter_Types));
while Present (Ptype) or else Present (Formal) loop
if No (Ptype)
or else No (Formal)
or else not Same_Base_Type (Ptype, Formal)
then
Match := False;
exit;
else
Next_Formal (Formal);
Next (Ptype);
end if;
end loop;
-- Anything else is of the wrong form
else
Error_Pragma_Arg
("wrong form for Parameter_Types parameter",
Arg_Parameter_Types);
end if;
end Check_Matching_Types;
end if;
-- Match is now False if the entry we found did not match
-- either a supplied Parameter_Types or Result_Types argument
if Match then
if No (Ent) then
Ent := Def_Id;
-- Ambiguous case, the flag Ambiguous shows if we already
-- detected this and output the initial messages.
else
if not Ambiguous then
Ambiguous := True;
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("pragma% does not uniquely identify subprogram!",
N);
Error_Msg_Sloc := Sloc (Ent);
Error_Msg_N ("matching subprogram #!", N);
Ent := Empty;
end if;
Error_Msg_Sloc := Sloc (Def_Id);
Error_Msg_N ("matching subprogram #!", N);
end if;
end if;
end if;
Hom_Id := Homonym (Hom_Id);
end loop;
-- See if we found an entry
if No (Ent) then
if not Ambiguous then
if Is_Generic_Subprogram (Entity (Arg_Internal)) then
Error_Pragma
("pragma% cannot be given for generic subprogram");
else
Error_Pragma
("pragma% does not identify local subprogram");
end if;
end if;
return;
end if;
-- Import pragmas must be be for imported entities
if Prag_Id = Pragma_Import_Function
or else
Prag_Id = Pragma_Import_Procedure
or else
Prag_Id = Pragma_Import_Valued_Procedure
then
if not Is_Imported (Ent) then
Error_Pragma
("pragma Import or Interface must precede pragma%");
end if;
-- Here we have the Export case which can set the entity as exported
-- But does not do so if the specified external name is null,
-- since that is taken as a signal in DEC Ada 83 (with which
-- we want to be compatible) to request no external name.
elsif Nkind (Arg_External) = N_String_Literal
and then String_Length (Strval (Arg_External)) = 0
then
null;
-- In all other cases, set entit as exported
else
Set_Exported (Ent, Arg_Internal);
end if;
-- Special processing for Valued_Procedure cases
if Prag_Id = Pragma_Import_Valued_Procedure
or else
Prag_Id = Pragma_Export_Valued_Procedure
then
Formal := First_Formal (Ent);
if No (Formal) then
Error_Pragma
("at least one parameter required for pragma%");
elsif Ekind (Formal) /= E_Out_Parameter then
Error_Pragma
("first parameter must have mode out for pragma%");
else
Set_Is_Valued_Procedure (Ent);
end if;
end if;
Set_Extended_Import_Export_External_Name (Ent, Arg_External);
-- Process Result_Mechanism argument if present. We have already
-- checked that this is only allowed for the function case.
if Present (Arg_Result_Mechanism) then
Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
end if;
-- Process Mechanism parameter if present. Note that this parameter
-- is not analyzed, and must not be analyzed since it is semantic
-- nonsense, so we get it in exactly as the parser left it.
if Present (Arg_Mechanism) then
declare
Formal : Entity_Id;
Massoc : Node_Id;
Mname : Node_Id;
Choice : Node_Id;
begin
-- A single mechanism association without a formal parameter
-- name is parsed as a parenthesized expression. All other
-- cases are parsed as aggregates, so we rewrite the single
-- parameter case as an aggregate for consistency.
if Nkind (Arg_Mechanism) /= N_Aggregate
and then Paren_Count (Arg_Mechanism) = 1
then
Rewrite (Arg_Mechanism,
Make_Aggregate (Sloc (Arg_Mechanism),
Expressions => New_List (
Relocate_Node (Arg_Mechanism))));
end if;
-- Case of only mechanism name given, applies to all formals
if Nkind (Arg_Mechanism) /= N_Aggregate then
Formal := First_Formal (Ent);
while Present (Formal) loop
Set_Mechanism_Value (Formal, Arg_Mechanism);
Next_Formal (Formal);
end loop;
-- Case of list of mechanism associations given
else
if Null_Record_Present (Arg_Mechanism) then
Error_Pragma_Arg
("inappropriate form for Mechanism parameter",
Arg_Mechanism);
end if;
-- Deal with positional ones first
Formal := First_Formal (Ent);
if Present (Expressions (Arg_Mechanism)) then
Mname := First (Expressions (Arg_Mechanism));
while Present (Mname) loop
if No (Formal) then
Error_Pragma_Arg
("too many mechanism associations", Mname);
end if;
Set_Mechanism_Value (Formal, Mname);
Next_Formal (Formal);
Next (Mname);
end loop;
end if;
-- Deal with named entries
if Present (Component_Associations (Arg_Mechanism)) then
Massoc := First (Component_Associations (Arg_Mechanism));
while Present (Massoc) loop
Choice := First (Choices (Massoc));
if Nkind (Choice) /= N_Identifier
or else Present (Next (Choice))
then
Error_Pragma_Arg
("incorrect form for mechanism association",
Massoc);
end if;
Formal := First_Formal (Ent);
loop
if No (Formal) then
Error_Pragma_Arg
("parameter name & not present", Choice);
end if;
if Chars (Choice) = Chars (Formal) then
Set_Mechanism_Value
(Formal, Expression (Massoc));
exit;
end if;
Next_Formal (Formal);
end loop;
Next (Massoc);
end loop;
end if;
end if;
end;
end if;
-- Process First_Optional_Parameter argument if present. We have
-- already checked that this is only allowed for the Import case.
if Present (Arg_First_Optional_Parameter) then
if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
Error_Pragma_Arg
("first optional parameter must be formal parameter name",
Arg_First_Optional_Parameter);
end if;
Formal := First_Formal (Ent);
loop
if No (Formal) then
Error_Pragma_Arg
("specified formal parameter& not found",
Arg_First_Optional_Parameter);
end if;
exit when Chars (Formal) =
Chars (Arg_First_Optional_Parameter);
Next_Formal (Formal);
end loop;
Set_First_Optional_Parameter (Ent, Formal);
-- Check specified and all remaining formals have right form
while Present (Formal) loop
if Ekind (Formal) /= E_In_Parameter then
Error_Msg_NE
("optional formal& is not of mode in!",
Arg_First_Optional_Parameter, Formal);
else
Dval := Default_Value (Formal);
if No (Dval) then
Error_Msg_NE
("optional formal& does not have default value!",
Arg_First_Optional_Parameter, Formal);
elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
null;
else
Error_Msg_FE
("default value for optional formal& is non-static!",
Arg_First_Optional_Parameter, Formal);
end if;
end if;
Set_Is_Optional_Parameter (Formal);
Next_Formal (Formal);
end loop;
end if;
end Process_Extended_Import_Export_Subprogram_Pragma;
--------------------------
-- Process_Generic_List --
--------------------------
procedure Process_Generic_List is
Arg : Node_Id;
Exp : Node_Id;
begin
GNAT_Pragma;
Check_No_Identifiers;
Check_At_Least_N_Arguments (1);
Arg := Arg1;
while Present (Arg) loop
Exp := Expression (Arg);
Analyze (Exp);
if not Is_Entity_Name (Exp)
or else
(not Is_Generic_Instance (Entity (Exp))
and then
not Is_Generic_Unit (Entity (Exp)))
then
Error_Pragma_Arg
("pragma% argument must be name of generic unit/instance",
Arg);
end if;
Next (Arg);
end loop;
end Process_Generic_List;
---------------------------------
-- Process_Import_Or_Interface --
---------------------------------
procedure Process_Import_Or_Interface is
C : Convention_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
begin
Process_Convention (C, Def_Id);
Kill_Size_Check_Code (Def_Id);
Note_Possible_Modification (Expression (Arg2));
if Ekind (Def_Id) = E_Variable
or else
Ekind (Def_Id) = E_Constant
then
-- User initialization is not allowed for imported object, but
-- the object declaration may contain a default initialization,
-- that will be discarded. Note that an explicit initialization
-- only counts if it comes from source, otherwise it is simply
-- the code generator making an implicit initialization explicit.
if Present (Expression (Parent (Def_Id)))
and then Comes_From_Source (Expression (Parent (Def_Id)))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
"\imported entities cannot be initialized ('R'M' 'B.1(24))",
Arg2);
else
Set_Imported (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
-- Note that we do not set Is_Public here. That's because we
-- only want to set if if there is no address clause, and we
-- don't know that yet, so we delay that processing till
-- freeze time.
-- pragma Import completes deferred constants
if Ekind (Def_Id) = E_Constant then
Set_Has_Completion (Def_Id);
end if;
-- It is not possible to import a constant of an unconstrained
-- array type (e.g. string) because there is no simple way to
-- write a meaningful subtype for it.
if Is_Array_Type (Etype (Def_Id))
and then not Is_Constrained (Etype (Def_Id))
then
Error_Msg_NE
("imported constant& must have a constrained subtype",
N, Def_Id);
end if;
end if;
elsif Is_Subprogram (Def_Id)
or else Is_Generic_Subprogram (Def_Id)
then
-- If the name is overloaded, pragma applies to all of the
-- denoted entities in the same declarative part.
Hom_Id := Def_Id;
while Present (Hom_Id) loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- Ignore inherited subprograms because the pragma will
-- apply to the parent operation, which is the one called.
if Is_Overloadable (Def_Id)
and then Present (Alias (Def_Id))
then
null;
-- If it is not a subprogram, it must be in an outer
-- scope and pragma does not apply.
elsif not Is_Subprogram (Def_Id)
and then not Is_Generic_Subprogram (Def_Id)
then
null;
-- Verify that the homonym is in the same declarative
-- part (not just the same scope).
elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
then
exit;
else
Set_Imported (Def_Id);
-- Special processing for Convention_Intrinsic
if C = Convention_Intrinsic then
-- Link_Name argument not allowed for intrinsic
if Present (Arg3)
and then Chars (Arg3) = Name_Link_Name
then
Arg4 := Arg3;
end if;
if Present (Arg4) then
Error_Pragma_Arg
("Link_Name argument not allowed for " &
"Import Intrinsic",
Arg4);
end if;
Set_Is_Intrinsic_Subprogram (Def_Id);
-- If no external name is present, then check that
-- this is a valid intrinsic subprogram. If an external
-- name is present, then this is handled by the back end.
if No (Arg3) then
Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
end if;
end if;
-- All interfaced procedures need an external symbol
-- created for them since they are always referenced
-- from another object file.
Set_Is_Public (Def_Id);
-- Verify that the subprogram does not have a completion
-- through a renaming declaration. For other completions
-- the pragma appears as a too late representation.
declare
Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
begin
if Present (Decl)
and then Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
and then
Nkind
(Unit_Declaration_Node
(Corresponding_Body (Decl))) =
N_Subprogram_Renaming_Declaration
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Msg_NE ("cannot import&#," &
" already completed by a renaming",
N, Def_Id);
end if;
end;
Set_Has_Completion (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
end if;
if Is_Compilation_Unit (Hom_Id) then
-- Its possible homonyms are not affected by the pragma.
-- Such homonyms might be present in the context of other
-- units being compiled.
exit;
else
Hom_Id := Homonym (Hom_Id);
end if;
end loop;
-- When the convention is Java, we also allow Import to be given
-- for packages, exceptions, and record components.
elsif C = Convention_Java
and then
(Ekind (Def_Id) = E_Package
or else Ekind (Def_Id) = E_Exception
or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
then
Set_Imported (Def_Id);
Set_Is_Public (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
else
Error_Pragma_Arg
("second argument of pragma% must be object or subprogram",
Arg2);
end if;
-- If this pragma applies to a compilation unit, then the unit,
-- which is a subprogram, does not require (or allow) a body.
-- We also do not need to elaborate imported procedures.
if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
declare
Cunit : constant Node_Id := Parent (Parent (N));
begin
Set_Body_Required (Cunit, False);
end;
end if;
end Process_Import_Or_Interface;
--------------------
-- Process_Inline --
--------------------
procedure Process_Inline (Active : Boolean) is
Assoc : Node_Id;
Decl : Node_Id;
Subp_Id : Node_Id;
Subp : Entity_Id;
Applies : Boolean;
Effective : Boolean := False;
procedure Make_Inline (Subp : Entity_Id);
-- Subp is the defining unit name of the subprogram
-- declaration. Set the flag, as well as the flag in the
-- corresponding body, if there is one present.
procedure Set_Inline_Flags (Subp : Entity_Id);
-- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
-- Returns True if it can be determined at this stage that inlining
-- is not possible, for examle if the body is available and contains
-- exception handlers, we prevent inlining, since otherwise we can
-- get undefined symbols at link time. This function also emits a
-- warning if front-end inlining is enabled and the pragma appears
-- too late.
-- ??? is business with link symbols still valid, or does it relate
-- to front end ZCX which is being phased out ???
---------------------------
-- Inlining_Not_Possible --
---------------------------
function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
Decl : constant Node_Id := Unit_Declaration_Node (Subp);
Stats : Node_Id;
begin
if Nkind (Decl) = N_Subprogram_Body then
Stats := Handled_Statement_Sequence (Decl);
return Present (Exception_Handlers (Stats))
or else Present (At_End_Proc (Stats));
elsif Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
then
if Front_End_Inlining
and then Analyzed (Corresponding_Body (Decl))
then
Error_Msg_N ("pragma appears too late, ignored?", N);
return True;
-- If the subprogram is a renaming as body, the body is
-- just a call to the renamed subprogram, and inlining is
-- trivially possible.
elsif
Nkind (Unit_Declaration_Node (Corresponding_Body (Decl)))
= N_Subprogram_Renaming_Declaration
then
return False;
else
Stats :=
Handled_Statement_Sequence
(Unit_Declaration_Node (Corresponding_Body (Decl)));
return
Present (Exception_Handlers (Stats))
or else Present (At_End_Proc (Stats));
end if;
else
-- If body is not available, assume the best, the check is
-- performed again when compiling enclosing package bodies.
return False;
end if;
end Inlining_Not_Possible;
-----------------
-- Make_Inline --
-----------------
procedure Make_Inline (Subp : Entity_Id) is
Kind : constant Entity_Kind := Ekind (Subp);
Inner_Subp : Entity_Id := Subp;
begin
if Etype (Subp) = Any_Type then
return;
-- If inlining is not possible, for now do not treat as an error
elsif Inlining_Not_Possible (Subp) then
Applies := True;
return;
-- Here we have a candidate for inlining, but we must exclude
-- derived operations. Otherwise we will end up trying to
-- inline a phantom declaration, and the result would be to
-- drag in a body which has no direct inlining associated with
-- it. That would not only be inefficient but would also result
-- in the backend doing cross-unit inlining in cases where it
-- was definitely inappropriate to do so.
-- However, a simple Comes_From_Source test is insufficient,
-- since we do want to allow inlining of generic instances,
-- which also do not come from source. Predefined operators do
-- not come from source but are not inlineable either.
elsif not Comes_From_Source (Subp)
and then not Is_Generic_Instance (Subp)
and then Scope (Subp) /= Standard_Standard
then
Applies := True;
return;
-- The referenced entity must either be the enclosing entity,
-- or an entity declared within the current open scope.
elsif Present (Scope (Subp))
and then Scope (Subp) /= Current_Scope
and then Subp /= Current_Scope
then
Error_Pragma_Arg
("argument of% must be entity in current scope", Assoc);
return;
end if;
-- Processing for procedure, operator or function.
-- If subprogram is aliased (as for an instance) indicate
-- that the renamed entity (if declared in the same unit)
-- is inlined.
if Is_Subprogram (Subp) then
while Present (Alias (Inner_Subp)) loop
Inner_Subp := Alias (Inner_Subp);
end loop;
if In_Same_Source_Unit (Subp, Inner_Subp) then
Set_Inline_Flags (Inner_Subp);
Decl := Parent (Parent (Inner_Subp));
if Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
then
Set_Inline_Flags (Corresponding_Body (Decl));
end if;
end if;
Applies := True;
-- For a generic subprogram set flag as well, for use at
-- the point of instantiation, to determine whether the
-- body should be generated.
elsif Is_Generic_Subprogram (Subp) then
Set_Inline_Flags (Subp);
Applies := True;
-- Literals are by definition inlined
elsif Kind = E_Enumeration_Literal then
null;
-- Anything else is an error
else
Error_Pragma_Arg
("expect subprogram name for pragma%", Assoc);
end if;
end Make_Inline;
----------------------
-- Set_Inline_Flags --
----------------------
procedure Set_Inline_Flags (Subp : Entity_Id) is
begin
if Active then
Set_Is_Inlined (Subp, True);
end if;
if not Has_Pragma_Inline (Subp) then
Set_Has_Pragma_Inline (Subp);
Set_Next_Rep_Item (N, First_Rep_Item (Subp));
Set_First_Rep_Item (Subp, N);
Effective := True;
end if;
end Set_Inline_Flags;
-- Start of processing for Process_Inline
begin
Check_No_Identifiers;
Check_At_Least_N_Arguments (1);
if Active then
Inline_Processing_Required := True;
end if;
Assoc := Arg1;
while Present (Assoc) loop
Subp_Id := Expression (Assoc);
Analyze (Subp_Id);
Applies := False;
if Is_Entity_Name (Subp_Id) then
Subp := Entity (Subp_Id);
if Subp = Any_Id then
-- If previous error, avoid cascaded errors
Applies := True;
Effective := True;
else
Make_Inline (Subp);
while Present (Homonym (Subp))
and then Scope (Homonym (Subp)) = Current_Scope
loop
Make_Inline (Homonym (Subp));
Subp := Homonym (Subp);
end loop;
end if;
end if;
if not Applies then
Error_Pragma_Arg
("inappropriate argument for pragma%", Assoc);
elsif not Effective
and then Warn_On_Redundant_Constructs
then
if Inlining_Not_Possible (Subp) then
Error_Msg_NE
("pragma Inline for& is ignored?", N, Entity (Subp_Id));
else
Error_Msg_NE
("pragma Inline for& is redundant?", N, Entity (Subp_Id));
end if;
end if;
Next (Assoc);
end loop;
end Process_Inline;
----------------------------
-- Process_Interface_Name --
----------------------------
procedure Process_Interface_Name
(Subprogram_Def : Entity_Id;
Ext_Arg : Node_Id;
Link_Arg : Node_Id)
is
Ext_Nam : Node_Id;
Link_Nam : Node_Id;
String_Val : String_Id;
procedure Check_Form_Of_Interface_Name (SN : Node_Id);
-- SN is a string literal node for an interface name. This routine
-- performs some minimal checks that the name is reasonable. In
-- particular that no spaces or other obviously incorrect characters
-- appear. This is only a warning, since any characters are allowed.
----------------------------------
-- Check_Form_Of_Interface_Name --
----------------------------------
procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
S : constant String_Id := Strval (Expr_Value_S (SN));
SL : constant Nat := String_Length (S);
C : Char_Code;
begin
if SL = 0 then
Error_Msg_N ("interface name cannot be null string", SN);
end if;
for J in 1 .. SL loop
C := Get_String_Char (S, J);
if Warn_On_Export_Import
and then (not In_Character_Range (C)
or else Get_Character (C) = ' '
or else Get_Character (C) = ',')
then
Error_Msg_N
("?interface name contains illegal character", SN);
end if;
end loop;
end Check_Form_Of_Interface_Name;
-- Start of processing for Process_Interface_Name
begin
if No (Link_Arg) then
if No (Ext_Arg) then
return;
elsif Chars (Ext_Arg) = Name_Link_Name then
Ext_Nam := Empty;
Link_Nam := Expression (Ext_Arg);
else
Check_Optional_Identifier (Ext_Arg, Name_External_Name);
Ext_Nam := Expression (Ext_Arg);
Link_Nam := Empty;
end if;
else
Check_Optional_Identifier (Ext_Arg, Name_External_Name);
Check_Optional_Identifier (Link_Arg, Name_Link_Name);
Ext_Nam := Expression (Ext_Arg);
Link_Nam := Expression (Link_Arg);
end if;
-- Check expressions for external name and link name are static
if Present (Ext_Nam) then
Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
Check_Form_Of_Interface_Name (Ext_Nam);
-- Verify that the external name is not the name of a local
-- entity, which would hide the imported one and lead to
-- run-time surprises. The problem can only arise for entities
-- declared in a package body (otherwise the external name is
-- fully qualified and won't conflict).
declare
Nam : Name_Id;
E : Entity_Id;
Par : Node_Id;
begin
if Prag_Id = Pragma_Import then
String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
Nam := Name_Find;
E := Entity_Id (Get_Name_Table_Info (Nam));
if Nam /= Chars (Subprogram_Def)
and then Present (E)
and then not Is_Overloadable (E)
and then Is_Immediately_Visible (E)
and then not Is_Imported (E)
and then Ekind (Scope (E)) = E_Package
then
Par := Parent (E);
while Present (Par) loop
if Nkind (Par) = N_Package_Body then
Error_Msg_Sloc := Sloc (E);
Error_Msg_NE
("imported entity is hidden by & declared#",
Ext_Arg, E);
exit;
end if;
Par := Parent (Par);
end loop;
end if;
end if;
end;
end if;
if Present (Link_Nam) then
Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
Check_Form_Of_Interface_Name (Link_Nam);
end if;
-- If there is no link name, just set the external name
if No (Link_Nam) then
Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
-- For the Link_Name case, the given literal is preceded by an
-- asterisk, which indicates to GCC that the given name should
-- be taken literally, and in particular that no prepending of
-- underlines should occur, even in systems where this is the
-- normal default.
else
Start_String;
Store_String_Char (Get_Char_Code ('*'));
String_Val := Strval (Expr_Value_S (Link_Nam));
for J in 1 .. String_Length (String_Val) loop
Store_String_Char (Get_String_Char (String_Val, J));
end loop;
Link_Nam :=
Make_String_Literal (Sloc (Link_Nam), End_String);
end if;
Set_Encoded_Interface_Name
(Get_Base_Subprogram (Subprogram_Def), Link_Nam);
Check_Duplicated_Export_Name (Link_Nam);
end Process_Interface_Name;
-----------------------------------------
-- Process_Interrupt_Or_Attach_Handler --
-----------------------------------------
procedure Process_Interrupt_Or_Attach_Handler is
Arg1_X : constant Node_Id := Expression (Arg1);
Handler_Proc : constant Entity_Id := Entity (Arg1_X);
Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
begin
Set_Is_Interrupt_Handler (Handler_Proc);
-- If the pragma is not associated with a handler procedure
-- within a protected type, then it must be for a nonprotected
-- procedure for the AAMP target, in which case we don't
-- associate a representation item with the procedure's scope.
if Ekind (Proc_Scope) = E_Protected_Type then
if Prag_Id = Pragma_Interrupt_Handler
or else
Prag_Id = Pragma_Attach_Handler
then
Record_Rep_Item (Proc_Scope, N);
end if;
end if;
end Process_Interrupt_Or_Attach_Handler;
--------------------------------------------------
-- Process_Restrictions_Or_Restriction_Warnings --
--------------------------------------------------
-- Note: some of the simple identifier cases were handled in par-prag,
-- but it is harmless (and more straightforward) to simply handle all
-- cases here, even if it means we repeat a bit of work in some cases.
procedure Process_Restrictions_Or_Restriction_Warnings
(Warn : Boolean)
is
Arg : Node_Id;
R_Id : Restriction_Id;
Id : Name_Id;
Expr : Node_Id;
Val : Uint;
procedure Check_Unit_Name (N : Node_Id);
-- Checks unit name parameter for No_Dependence. Returns if it has
-- an appropriate form, otherwise raises pragma argument error.
---------------------
-- Check_Unit_Name --
---------------------
procedure Check_Unit_Name (N : Node_Id) is
begin
if Nkind (N) = N_Selected_Component then
Check_Unit_Name (Prefix (N));
Check_Unit_Name (Selector_Name (N));
elsif Nkind (N) = N_Identifier then
return;
else
Error_Pragma_Arg
("wrong form for unit name for No_Dependence", N);
end if;
end Check_Unit_Name;
-- Start of processing for Process_Restrictions_Or_Restriction_Warnings
begin
Check_Ada_83_Warning;
Check_At_Least_N_Arguments (1);
Check_Valid_Configuration_Pragma;
Arg := Arg1;
while Present (Arg) loop
Id := Chars (Arg);
Expr := Expression (Arg);
-- Case of no restriction identifier present
if Id = No_Name then
if Nkind (Expr) /= N_Identifier then
Error_Pragma_Arg
("invalid form for restriction", Arg);
end if;
R_Id :=
Get_Restriction_Id
(Process_Restriction_Synonyms (Expr));
if R_Id not in All_Boolean_Restrictions then
Error_Pragma_Arg
("invalid restriction identifier", Arg);
end if;
if Implementation_Restriction (R_Id) then
Check_Restriction
(No_Implementation_Restrictions, Arg);
end if;
-- If this is a warning, then set the warning unless we already
-- have a real restriction active (we never want a warning to
-- override a real restriction).
if Warn then
if not Restriction_Active (R_Id) then
Set_Restriction (R_Id, N);
Restriction_Warnings (R_Id) := True;
end if;
-- If real restriction case, then set it and make sure that the
-- restriction warning flag is off, since a real restriction
-- always overrides a warning.
else
Set_Restriction (R_Id, N);
Restriction_Warnings (R_Id) := False;
end if;
-- A very special case that must be processed here: pragma
-- Restrictions (No_Exceptions) turns off all run-time
-- checking. This is a bit dubious in terms of the formal
-- language definition, but it is what is intended by RM
-- H.4(12). Restriction_Warnings never affects generated code
-- so this is done only in the real restriction case.
if R_Id = No_Exceptions and then not Warn then
Scope_Suppress := (others => True);
end if;
-- Case of No_Dependence => unit-name. Note that the parser
-- already made the necessary entry in the No_Dependence table.
elsif Id = Name_No_Dependence then
Check_Unit_Name (Expr);
-- All other cases of restriction identifier present
else
R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
Analyze_And_Resolve (Expr, Any_Integer);
if R_Id not in All_Parameter_Restrictions then
Error_Pragma_Arg
("invalid restriction parameter identifier", Arg);
elsif not Is_OK_Static_Expression (Expr) then
Flag_Non_Static_Expr
("value must be static expression!", Expr);
raise Pragma_Exit;
elsif not Is_Integer_Type (Etype (Expr))
or else Expr_Value (Expr) < 0
then
Error_Pragma_Arg
("value must be non-negative integer", Arg);
end if;
-- Restriction pragma is active
Val := Expr_Value (Expr);
if not UI_Is_In_Int_Range (Val) then
Error_Pragma_Arg
("pragma ignored, value too large?", Arg);
end if;
-- Warning case. If the real restriction is active, then we
-- ignore the request, since warning never overrides a real
-- restriction. Otherwise we set the proper warning. Note that
-- this circuit sets the warning again if it is already set,
-- which is what we want, since the constant may have changed.
if Warn then
if not Restriction_Active (R_Id) then
Set_Restriction
(R_Id, N, Integer (UI_To_Int (Val)));
Restriction_Warnings (R_Id) := True;
end if;
-- Real restriction case, set restriction and make sure warning
-- flag is off since real restriction always overrides warning.
else
Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
Restriction_Warnings (R_Id) := False;
end if;
end if;
Next (Arg);
end loop;
end Process_Restrictions_Or_Restriction_Warnings;
---------------------------------
-- Process_Suppress_Unsuppress --
---------------------------------
-- Note: this procedure makes entries in the check suppress data
-- structures managed by Sem. See spec of package Sem for full
-- details on how we handle recording of check suppression.
procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
C : Check_Id;
E_Id : Node_Id;
E : Entity_Id;
In_Package_Spec : constant Boolean :=
(Ekind (Current_Scope) = E_Package
or else
Ekind (Current_Scope) = E_Generic_Package)
and then not In_Package_Body (Current_Scope);
procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
-- Used to suppress a single check on the given entity
--------------------------------
-- Suppress_Unsuppress_Echeck --
--------------------------------
procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
ESR : constant Entity_Check_Suppress_Record :=
(Entity => E,
Check => C,
Suppress => Suppress_Case);
begin
Set_Checks_May_Be_Suppressed (E);
if In_Package_Spec then
Global_Entity_Suppress.Append (ESR);
else
Local_Entity_Suppress.Append (ESR);
end if;
-- If this is a first subtype, and the base type is distinct,
-- then also set the suppress flags on the base type.
if Is_First_Subtype (E)
and then Etype (E) /= E
then
Suppress_Unsuppress_Echeck (Etype (E), C);
end if;
end Suppress_Unsuppress_Echeck;
-- Start of processing for Process_Suppress_Unsuppress
begin
-- Suppress/Unsuppress can appear as a configuration pragma,
-- or in a declarative part or a package spec (RM 11.5(5))
if not Is_Configuration_Pragma then
Check_Is_In_Decl_Part_Or_Package_Spec;
end if;
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_No_Identifier (Arg1);
Check_Arg_Is_Identifier (Arg1);
if not Is_Check_Name (Chars (Expression (Arg1))) then
Error_Pragma_Arg
("argument of pragma% is not valid check name", Arg1);
else
C := Get_Check_Id (Chars (Expression (Arg1)));
end if;
if Arg_Count = 1 then
-- Make an entry in the local scope suppress table. This is the
-- table that directly shows the current value of the scope
-- suppress check for any check id value.
if C = All_Checks then
-- For All_Checks, we set all specific checks with the
-- exception of Elaboration_Check, which is handled specially
-- because of not wanting All_Checks to have the effect of
-- deactivating static elaboration order processing.
for J in Scope_Suppress'Range loop
if J /= Elaboration_Check then
Scope_Suppress (J) := Suppress_Case;
end if;
end loop;
-- If not All_Checks, just set appropriate entry. Note that we
-- will set Elaboration_Check if this is explicitly specified.
else
Scope_Suppress (C) := Suppress_Case;
end if;
-- Also make an entry in the Local_Entity_Suppress table. See
-- extended description in the package spec of Sem for details.
Local_Entity_Suppress.Append
((Entity => Empty,
Check => C,
Suppress => Suppress_Case));
-- Case of two arguments present, where the check is
-- suppressed for a specified entity (given as the second
-- argument of the pragma)
else
Check_Optional_Identifier (Arg2, Name_On);
E_Id := Expression (Arg2);
Analyze (E_Id);
if not Is_Entity_Name (E_Id) then
Error_Pragma_Arg
("second argument of pragma% must be entity name", Arg2);
end if;
E := Entity (E_Id);
if E = Any_Id then
return;
end if;
-- Enforce RM 11.5(7) which requires that for a pragma that
-- appears within a package spec, the named entity must be
-- within the package spec. We allow the package name itself
-- to be mentioned since that makes sense, although it is not
-- strictly allowed by 11.5(7).
if In_Package_Spec
and then E /= Current_Scope
and then Scope (E) /= Current_Scope
then
Error_Pragma_Arg
("entity in pragma% is not in package spec ('R'M 11.5(7))",
Arg2);
end if;
-- Loop through homonyms. As noted below, in the case of a package
-- spec, only homonyms within the package spec are considered.
loop
Suppress_Unsuppress_Echeck (E, C);
if Is_Generic_Instance (E)
and then Is_Subprogram (E)
and then Present (Alias (E))
then
Suppress_Unsuppress_Echeck (Alias (E), C);
end if;
-- Move to next homonym
E := Homonym (E);
exit when No (E);
-- If we are within a package specification, the
-- pragma only applies to homonyms in the same scope.
exit when In_Package_Spec
and then Scope (E) /= Current_Scope;
end loop;
end if;
end Process_Suppress_Unsuppress;
------------------
-- Set_Exported --
------------------
procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
begin
if Is_Imported (E) then
Error_Pragma_Arg
("cannot export entity& that was previously imported", Arg);
elsif Present (Address_Clause (E)) then
Error_Pragma_Arg
("cannot export entity& that has an address clause", Arg);
end if;
Set_Is_Exported (E);
-- Generate a reference for entity explicitly, because the
-- identifier may be overloaded and name resolution will not
-- generate one.
Generate_Reference (E, Arg);
-- Deal with exporting non-library level entity
if not Is_Library_Level_Entity (E) then
-- Not allowed at all for subprograms
if Is_Subprogram (E) then
Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
-- Otherwise set public and statically allocated
else
Set_Is_Public (E);
Set_Is_Statically_Allocated (E);
-- Warn if the corresponding W flag is set and the pragma
-- comes from source. The latter may not be true e.g. on
-- VMS where we expand export pragmas for exception codes
-- associated with imported or exported exceptions. We do
-- not want to generate a warning for something that the
-- user did not write.
if Warn_On_Export_Import
and then Comes_From_Source (Arg)
then
Error_Msg_NE
("?& has been made static as a result of Export", Arg, E);
Error_Msg_N
("\this usage is non-standard and non-portable", Arg);
end if;
end if;
end if;
if Warn_On_Export_Import and then Is_Type (E) then
Error_Msg_NE
("exporting a type has no effect?", Arg, E);
end if;
if Warn_On_Export_Import and Inside_A_Generic then
Error_Msg_NE
("all instances of& will have the same external name?", Arg, E);
end if;
end Set_Exported;
----------------------------------------------
-- Set_Extended_Import_Export_External_Name --
----------------------------------------------
procedure Set_Extended_Import_Export_External_Name
(Internal_Ent : Entity_Id;
Arg_External : Node_Id)
is
Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
New_Name : Node_Id;
begin
if No (Arg_External) then
return;
end if;
Check_Arg_Is_External_Name (Arg_External);
if Nkind (Arg_External) = N_String_Literal then
if String_Length (Strval (Arg_External)) = 0 then
return;
else
New_Name := Adjust_External_Name_Case (Arg_External);
end if;
elsif Nkind (Arg_External) = N_Identifier then
New_Name := Get_Default_External_Name (Arg_External);
-- Check_Arg_Is_External_Name should let through only
-- identifiers and string literals or static string
-- expressions (which are folded to string literals).
else
raise Program_Error;
end if;
-- If we already have an external name set (by a prior normal
-- Import or Export pragma), then the external names must match
if Present (Interface_Name (Internal_Ent)) then
Check_Matching_Internal_Names : declare
S1 : constant String_Id := Strval (Old_Name);
S2 : constant String_Id := Strval (New_Name);
procedure Mismatch;
-- Called if names do not match
--------------
-- Mismatch --
--------------
procedure Mismatch is
begin
Error_Msg_Sloc := Sloc (Old_Name);
Error_Pragma_Arg
("external name does not match that given #",
Arg_External);
end Mismatch;
-- Start of processing for Check_Matching_Internal_Names
begin
if String_Length (S1) /= String_Length (S2) then
Mismatch;
else
for J in 1 .. String_Length (S1) loop
if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
Mismatch;
end if;
end loop;
end if;
end Check_Matching_Internal_Names;
-- Otherwise set the given name
else
Set_Encoded_Interface_Name (Internal_Ent, New_Name);
Check_Duplicated_Export_Name (New_Name);
end if;
end Set_Extended_Import_Export_External_Name;
------------------
-- Set_Imported --
------------------
procedure Set_Imported (E : Entity_Id) is
begin
Error_Msg_Sloc := Sloc (E);
if Is_Exported (E) or else Is_Imported (E) then
Error_Msg_NE ("import of& declared# not allowed", N, E);
if Is_Exported (E) then
Error_Msg_N ("\entity was previously exported", N);
else
Error_Msg_N ("\entity was previously imported", N);
end if;
Error_Pragma ("\(pragma% applies to all previous entities)");
else
Set_Is_Imported (E);
-- If the entity is an object that is not at the library
-- level, then it is statically allocated. We do not worry
-- about objects with address clauses in this context since
-- they are not really imported in the linker sense.
if Is_Object (E)
and then not Is_Library_Level_Entity (E)
and then No (Address_Clause (E))
then
Set_Is_Statically_Allocated (E);
end if;
end if;
end Set_Imported;
-------------------------
-- Set_Mechanism_Value --
-------------------------
-- Note: the mechanism name has not been analyzed (and cannot indeed
-- be analyzed, since it is semantic nonsense), so we get it in the
-- exact form created by the parser.
procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
Class : Node_Id;
Param : Node_Id;
procedure Bad_Class;
-- Signal bad descriptor class name
procedure Bad_Mechanism;
-- Signal bad mechanism name
---------------
-- Bad_Class --
---------------
procedure Bad_Class is
begin
Error_Pragma_Arg ("unrecognized descriptor class name", Class);
end Bad_Class;
-------------------------
-- Bad_Mechanism_Value --
-------------------------
procedure Bad_Mechanism is
begin
Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
end Bad_Mechanism;
-- Start of processing for Set_Mechanism_Value
begin
if Mechanism (Ent) /= Default_Mechanism then
Error_Msg_NE
("mechanism for & has already been set", Mech_Name, Ent);
end if;
-- MECHANISM_NAME ::= value | reference | descriptor
if Nkind (Mech_Name) = N_Identifier then
if Chars (Mech_Name) = Name_Value then
Set_Mechanism (Ent, By_Copy);
return;
elsif Chars (Mech_Name) = Name_Reference then
Set_Mechanism (Ent, By_Reference);
return;
elsif Chars (Mech_Name) = Name_Descriptor then
Check_VMS (Mech_Name);
Set_Mechanism (Ent, By_Descriptor);
return;
elsif Chars (Mech_Name) = Name_Copy then
Error_Pragma_Arg
("bad mechanism name, Value assumed", Mech_Name);
else
Bad_Mechanism;
end if;
-- MECHANISM_NAME ::= descriptor (CLASS_NAME)
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
-- Note: this form is parsed as an indexed component
elsif Nkind (Mech_Name) = N_Indexed_Component then
Class := First (Expressions (Mech_Name));
if Nkind (Prefix (Mech_Name)) /= N_Identifier
or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
or else Present (Next (Class))
then
Bad_Mechanism;
end if;
-- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
-- Note: this form is parsed as a function call
elsif Nkind (Mech_Name) = N_Function_Call then
Param := First (Parameter_Associations (Mech_Name));
if Nkind (Name (Mech_Name)) /= N_Identifier
or else Chars (Name (Mech_Name)) /= Name_Descriptor
or else Present (Next (Param))
or else No (Selector_Name (Param))
or else Chars (Selector_Name (Param)) /= Name_Class
then
Bad_Mechanism;
else
Class := Explicit_Actual_Parameter (Param);
end if;
else
Bad_Mechanism;
end if;
-- Fall through here with Class set to descriptor class name
Check_VMS (Mech_Name);
if Nkind (Class) /= N_Identifier then
Bad_Class;
elsif Chars (Class) = Name_UBS then
Set_Mechanism (Ent, By_Descriptor_UBS);
elsif Chars (Class) = Name_UBSB then
Set_Mechanism (Ent, By_Descriptor_UBSB);
elsif Chars (Class) = Name_UBA then
Set_Mechanism (Ent, By_Descriptor_UBA);
elsif Chars (Class) = Name_S then
Set_Mechanism (Ent, By_Descriptor_S);
elsif Chars (Class) = Name_SB then
Set_Mechanism (Ent, By_Descriptor_SB);
elsif Chars (Class) = Name_A then
Set_Mechanism (Ent, By_Descriptor_A);
elsif Chars (Class) = Name_NCA then
Set_Mechanism (Ent, By_Descriptor_NCA);
else
Bad_Class;
end if;
end Set_Mechanism_Value;
---------------------------
-- Set_Ravenscar_Profile --
---------------------------
-- The tasks to be done here are
-- Set required policies
-- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
-- pragma Locking_Policy (Ceiling_Locking)
-- Set Detect_Blocking mode
-- Set required restrictions (see System.Rident for detailed list)
procedure Set_Ravenscar_Profile (N : Node_Id) is
begin
-- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
if Task_Dispatching_Policy /= ' '
and then Task_Dispatching_Policy /= 'F'
then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
-- Set the FIFO_Within_Priorities policy, but always preserve
-- System_Location since we like the error message with the run time
-- name.
else
Task_Dispatching_Policy := 'F';
if Task_Dispatching_Policy_Sloc /= System_Location then
Task_Dispatching_Policy_Sloc := Loc;
end if;
end if;
-- pragma Locking_Policy (Ceiling_Locking)
if Locking_Policy /= ' '
and then Locking_Policy /= 'C'
then
Error_Msg_Sloc := Locking_Policy_Sloc;
Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
-- Set the Ceiling_Locking policy, but preserve System_Location since
-- we like the error message with the run time name.
else
Locking_Policy := 'C';
if Locking_Policy_Sloc /= System_Location then
Locking_Policy_Sloc := Loc;
end if;
end if;
-- pragma Detect_Blocking
Detect_Blocking := True;
-- Set the corresponding restrictions
Set_Profile_Restrictions (Ravenscar, N, Warn => False);
end Set_Ravenscar_Profile;
-- Start of processing for Analyze_Pragma
begin
if not Is_Pragma_Name (Chars (N)) then
if Warn_On_Unrecognized_Pragma then
Error_Pragma ("unrecognized pragma%?");
else
return;
end if;
else
Prag_Id := Get_Pragma_Id (Chars (N));
end if;
-- Preset arguments
Arg1 := Empty;
Arg2 := Empty;
Arg3 := Empty;
Arg4 := Empty;
if Present (Pragma_Argument_Associations (N)) then
Arg1 := First (Pragma_Argument_Associations (N));
if Present (Arg1) then
Arg2 := Next (Arg1);
if Present (Arg2) then
Arg3 := Next (Arg2);
if Present (Arg3) then
Arg4 := Next (Arg3);
end if;
end if;
end if;
end if;
-- Count number of arguments
declare
Arg_Node : Node_Id;
begin
Arg_Count := 0;
Arg_Node := Arg1;
while Present (Arg_Node) loop
Arg_Count := Arg_Count + 1;
Next (Arg_Node);
end loop;
end;
-- An enumeration type defines the pragmas that are supported by the
-- implementation. Get_Pragma_Id (in package Prag) transorms a name
-- into the corresponding enumeration value for the following case.
case Prag_Id is
-----------------
-- Abort_Defer --
-----------------
-- pragma Abort_Defer;
when Pragma_Abort_Defer =>
GNAT_Pragma;
Check_Arg_Count (0);
-- The only required semantic processing is to check the
-- placement. This pragma must appear at the start of the
-- statement sequence of a handled sequence of statements.
if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
or else N /= First (Statements (Parent (N)))
then
Pragma_Misplaced;
end if;
------------
-- Ada_83 --
------------
-- pragma Ada_83;
-- Note: this pragma also has some specific processing in Par.Prag
-- because we want to set the Ada version mode during parsing.
when Pragma_Ada_83 =>
GNAT_Pragma;
Ada_Version := Ada_83;
Ada_Version_Explicit := Ada_Version;
Check_Arg_Count (0);
------------
-- Ada_95 --
------------
-- pragma Ada_95;
-- Note: this pragma also has some specific processing in Par.Prag
-- because we want to set the Ada 83 version mode during parsing.
when Pragma_Ada_95 =>
GNAT_Pragma;
Ada_Version := Ada_95;
Ada_Version_Explicit := Ada_Version;
Check_Arg_Count (0);
---------------------
-- Ada_05/Ada_2005 --
---------------------
-- pragma Ada_05;
-- pragma Ada_05 (LOCAL_NAME);
-- pragma Ada_2005;
-- pragma Ada_2005 (LOCAL_NAME):
-- Note: these pragma also have some specific processing in Par.Prag
-- because we want to set the Ada 2005 version mode during parsing.
when Pragma_Ada_05 | Pragma_Ada_2005 => declare
E_Id : Node_Id;
begin
GNAT_Pragma;
if Arg_Count = 1 then
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
Set_Is_Ada_2005_Only (Entity (E_Id));
else
Check_Arg_Count (0);
Ada_Version := Ada_05;
Ada_Version_Explicit := Ada_05;
end if;
end;
----------------------
-- All_Calls_Remote --
----------------------
-- pragma All_Calls_Remote [(library_package_NAME)];
when Pragma_All_Calls_Remote => All_Calls_Remote : declare
Lib_Entity : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Lib_Entity := Find_Lib_Unit_Name;
-- This pragma should only apply to a RCI unit (RM E.2.3(23))
if Present (Lib_Entity)
and then not Debug_Flag_U
then
if not Is_Remote_Call_Interface (Lib_Entity) then
Error_Pragma ("pragma% only apply to rci unit");
-- Set flag for entity of the library unit
else
Set_Has_All_Calls_Remote (Lib_Entity);
end if;
end if;
end All_Calls_Remote;
--------------
-- Annotate --
--------------
-- pragma Annotate (IDENTIFIER {, ARG});
-- ARG ::= NAME | EXPRESSION
when Pragma_Annotate => Annotate : begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
Check_Arg_Is_Identifier (Arg1);
declare
Arg : Node_Id := Arg2;
Exp : Node_Id;
begin
while Present (Arg) loop
Exp := Expression (Arg);
Analyze (Exp);
if Is_Entity_Name (Exp) then
null;
elsif Nkind (Exp) = N_String_Literal then
Resolve (Exp, Standard_String);
elsif Is_Overloaded (Exp) then
Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
else
Resolve (Exp);
end if;
Next (Arg);
end loop;
end;
end Annotate;
------------
-- Assert --
------------
-- pragma Assert ([Check =>] Boolean_EXPRESSION
-- [, [Message =>] Static_String_EXPRESSION]);
when Pragma_Assert => Assert : declare
Expr : Node_Id;
begin
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_Arg_Order ((Name_Check, Name_Message));
Check_Optional_Identifier (Arg1, Name_Check);
if Arg_Count > 1 then
Check_Optional_Identifier (Arg2, Name_Message);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
end if;
-- If expansion is active and assertions are inactive, then
-- we rewrite the Assertion as:
-- if False and then condition then
-- null;
-- end if;
-- The reason we do this rewriting during semantic analysis
-- rather than as part of normal expansion is that we cannot
-- analyze and expand the code for the boolean expression
-- directly, or it may cause insertion of actions that would
-- escape the attempt to suppress the assertion code.
Expr := Expression (Arg1);
if Expander_Active and not Assertions_Enabled then
Rewrite (N,
Make_If_Statement (Loc,
Condition =>
Make_And_Then (Loc,
Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
Right_Opnd => Expr),
Then_Statements => New_List (
Make_Null_Statement (Loc))));
Analyze (N);
-- Otherwise (if assertions are enabled, or if we are not
-- operating with expansion active), then we just analyze
-- and resolve the expression.
else
Analyze_And_Resolve (Expr, Any_Boolean);
end if;
-- If assertion is of the form (X'First = literal), where X is
-- formal parameter, then set Low_Bound_Known flag on this formal.
if Nkind (Expr) = N_Op_Eq then
declare
Right : constant Node_Id := Right_Opnd (Expr);
Left : constant Node_Id := Left_Opnd (Expr);
begin
if Nkind (Left) = N_Attribute_Reference
and then Attribute_Name (Left) = Name_First
and then Is_Entity_Name (Prefix (Left))
and then Is_Formal (Entity (Prefix (Left)))
and then Nkind (Right) = N_Integer_Literal
then
Set_Low_Bound_Known (Entity (Prefix (Left)));
end if;
end;
end if;
end Assert;
----------------------
-- Assertion_Policy --
----------------------
-- pragma Assertion_Policy (Check | Ignore)
when Pragma_Assertion_Policy =>
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
Assertions_Enabled := Chars (Expression (Arg1)) = Name_Check;
---------------
-- AST_Entry --
---------------
-- pragma AST_Entry (entry_IDENTIFIER);
when Pragma_AST_Entry => AST_Entry : declare
Ent : Node_Id;
begin
GNAT_Pragma;
Check_VMS (N);
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Local_Name (Arg1);
Ent := Entity (Expression (Arg1));
-- Note: the implementation of the AST_Entry pragma could handle
-- the entry family case fine, but for now we are consistent with
-- the DEC rules, and do not allow the pragma, which of course
-- has the effect of also forbidding the attribute.
if Ekind (Ent) /= E_Entry then
Error_Pragma_Arg
("pragma% argument must be simple entry name", Arg1);
elsif Is_AST_Entry (Ent) then
Error_Pragma_Arg
("duplicate % pragma for entry", Arg1);
elsif Has_Homonym (Ent) then
Error_Pragma_Arg
("pragma% argument cannot specify overloaded entry", Arg1);
else
declare
FF : constant Entity_Id := First_Formal (Ent);
begin
if Present (FF) then
if Present (Next_Formal (FF)) then
Error_Pragma_Arg
("entry for pragma% can have only one argument",
Arg1);
elsif Parameter_Mode (FF) /= E_In_Parameter then
Error_Pragma_Arg
("entry parameter for pragma% must have mode IN",
Arg1);
end if;
end if;
end;
Set_Is_AST_Entry (Ent);
end if;
end AST_Entry;
------------------
-- Asynchronous --
------------------
-- pragma Asynchronous (LOCAL_NAME);
when Pragma_Asynchronous => Asynchronous : declare
Nm : Entity_Id;
C_Ent : Entity_Id;
L : List_Id;
S : Node_Id;
N : Node_Id;
Formal : Entity_Id;
procedure Process_Async_Pragma;
-- Common processing for procedure and access-to-procedure case
--------------------------
-- Process_Async_Pragma --
--------------------------
procedure Process_Async_Pragma is
begin
if No (L) then
Set_Is_Asynchronous (Nm);
return;
end if;
-- The formals should be of mode IN (RM E.4.1(6))
S := First (L);
while Present (S) loop
Formal := Defining_Identifier (S);
if Nkind (Formal) = N_Defining_Identifier
and then Ekind (Formal) /= E_In_Parameter
then
Error_Pragma_Arg
("pragma% procedure can only have IN parameter",
Arg1);
end if;
Next (S);
end loop;
Set_Is_Asynchronous (Nm);
end Process_Async_Pragma;
-- Start of processing for pragma Asynchronous
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
if Debug_Flag_U then
return;
end if;
C_Ent := Cunit_Entity (Current_Sem_Unit);
Analyze (Expression (Arg1));
Nm := Entity (Expression (Arg1));
if not Is_Remote_Call_Interface (C_Ent)
and then not Is_Remote_Types (C_Ent)
then
-- This pragma should only appear in an RCI or Remote Types
-- unit (RM E.4.1(4))
Error_Pragma
("pragma% not in Remote_Call_Interface or " &
"Remote_Types unit");
end if;
if Ekind (Nm) = E_Procedure
and then Nkind (Parent (Nm)) = N_Procedure_Specification
then
if not Is_Remote_Call_Interface (Nm) then
Error_Pragma_Arg
("pragma% cannot be applied on non-remote procedure",
Arg1);
end if;
L := Parameter_Specifications (Parent (Nm));
Process_Async_Pragma;
return;
elsif Ekind (Nm) = E_Function then
Error_Pragma_Arg
("pragma% cannot be applied to function", Arg1);
elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
if Is_Record_Type (Nm) then
-- A record type that is the Equivalent_Type for
-- a remote access-to-subprogram type.
N := Declaration_Node (Corresponding_Remote_Type (Nm));
else
-- A non-expanded RAS type (case where distribution is
-- not enabled).
N := Declaration_Node (Nm);
end if;
if Nkind (N) = N_Full_Type_Declaration
and then Nkind (Type_Definition (N)) =
N_Access_Procedure_Definition
then
L := Parameter_Specifications (Type_Definition (N));
Process_Async_Pragma;
if Is_Asynchronous (Nm)
and then Expander_Active
and then Get_PCS_Name /= Name_No_DSA
then
RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
end if;
else
Error_Pragma_Arg
("pragma% cannot reference access-to-function type",
Arg1);
end if;
-- Only other possibility is Access-to-class-wide type
elsif Is_Access_Type (Nm)
and then Is_Class_Wide_Type (Designated_Type (Nm))
then
Check_First_Subtype (Arg1);
Set_Is_Asynchronous (Nm);
if Expander_Active then
RACW_Type_Is_Asynchronous (Nm);
end if;
else
Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
end if;
end Asynchronous;
------------
-- Atomic --
------------
-- pragma Atomic (LOCAL_NAME);
when Pragma_Atomic =>
Process_Atomic_Shared_Volatile;
-----------------------
-- Atomic_Components --
-----------------------
-- pragma Atomic_Components (array_LOCAL_NAME);
-- This processing is shared by Volatile_Components
when Pragma_Atomic_Components |
Pragma_Volatile_Components =>
Atomic_Components : declare
E_Id : Node_Id;
E : Entity_Id;
D : Node_Id;
K : Node_Kind;
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if Rep_Item_Too_Early (E, N)
or else
Rep_Item_Too_Late (E, N)
then
return;
end if;
D := Declaration_Node (E);
K := Nkind (D);
if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
or else
((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
and then Nkind (D) = N_Object_Declaration
and then Nkind (Object_Definition (D)) =
N_Constrained_Array_Definition)
then
-- The flag is set on the object, or on the base type
if Nkind (D) /= N_Object_Declaration then
E := Base_Type (E);
end if;
Set_Has_Volatile_Components (E);
if Prag_Id = Pragma_Atomic_Components then
Set_Has_Atomic_Components (E);
if Is_Packed (E) then
Set_Is_Packed (E, False);
Error_Pragma_Arg
("?Pack canceled, cannot pack atomic components",
Arg1);
end if;
end if;
else
Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
end if;
end Atomic_Components;
--------------------
-- Attach_Handler --
--------------------
-- pragma Attach_Handler (handler_NAME, EXPRESSION);
when Pragma_Attach_Handler =>
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (2);
if No_Run_Time_Mode then
Error_Msg_CRT ("Attach_Handler pragma", N);
else
Check_Interrupt_Or_Attach_Handler;
-- The expression that designates the attribute may
-- depend on a discriminant, and is therefore a per-
-- object expression, to be expanded in the init proc.
-- If expansion is enabled, perform semantic checks
-- on a copy only.
if Expander_Active then
declare
Temp : constant Node_Id :=
New_Copy_Tree (Expression (Arg2));
begin
Set_Parent (Temp, N);
Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
end;
else
Analyze (Expression (Arg2));
Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
end if;
Process_Interrupt_Or_Attach_Handler;
end if;
--------------------
-- C_Pass_By_Copy --
--------------------
-- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
Arg : Node_Id;
Val : Uint;
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, "max_size");
Arg := Expression (Arg1);
Check_Arg_Is_Static_Expression (Arg, Any_Integer);
Val := Expr_Value (Arg);
if Val <= 0 then
Error_Pragma_Arg
("maximum size for pragma% must be positive", Arg1);
elsif UI_Is_In_Int_Range (Val) then
Default_C_Record_Mechanism := UI_To_Int (Val);
-- If a giant value is given, Int'Last will do well enough.
-- If sometime someone complains that a record larger than
-- two gigabytes is not copied, we will worry about it then!
else
Default_C_Record_Mechanism := Mechanism_Type'Last;
end if;
end C_Pass_By_Copy;
-------------
-- Comment --
-------------
-- pragma Comment (static_string_EXPRESSION)
-- Processing for pragma Comment shares the circuitry for
-- pragma Ident. The only differences are that Ident enforces
-- a limit of 31 characters on its argument, and also enforces
-- limitations on placement for DEC compatibility. Pragma
-- Comment shares neither of these restrictions.
-------------------
-- Common_Object --
-------------------
-- pragma Common_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- Processing for this pragma is shared with Psect_Object
--------------------------
-- Compile_Time_Warning --
--------------------------
-- pragma Compile_Time_Warning
-- (boolean_EXPRESSION, static_string_EXPRESSION);
when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
GNAT_Pragma;
Check_Arg_Count (2);
Check_No_Identifiers;
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
Analyze_And_Resolve (Arg1x, Standard_Boolean);
if Compile_Time_Known_Value (Arg1x) then
if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
declare
Str : constant String_Id :=
Strval (Get_Pragma_Arg (Arg2));
Len : constant Int := String_Length (Str);
Cont : Boolean;
Ptr : Nat;
CC : Char_Code;
C : Character;
begin
Cont := False;
Ptr := 1;
-- Loop through segments of message separated by line
-- feeds. We output these segments as separate messages
-- with continuation marks for all but the first.
loop
Error_Msg_Strlen := 0;
-- Loop to copy characters from argument to error
-- message string buffer.
loop
exit when Ptr > Len;
CC := Get_String_Char (Str, Ptr);
Ptr := Ptr + 1;
-- Ignore wide chars ??? else store character
if In_Character_Range (CC) then
C := Get_Character (CC);
exit when C = ASCII.LF;
Error_Msg_Strlen := Error_Msg_Strlen + 1;
Error_Msg_String (Error_Msg_Strlen) := C;
end if;
end loop;
-- Here with one line ready to go
if Cont = False then
Error_Msg_N ("?~", Arg1);
Cont := True;
else
Error_Msg_N ("\?~", Arg1);
end if;
exit when Ptr > Len;
end loop;
end;
end if;
end if;
end Compile_Time_Warning;
-----------------------------
-- Complete_Representation --
-----------------------------
-- pragma Complete_Representation;
when Pragma_Complete_Representation =>
GNAT_Pragma;
Check_Arg_Count (0);
if Nkind (Parent (N)) /= N_Record_Representation_Clause then
Error_Pragma
("pragma & must appear within record representation clause");
end if;
----------------------------
-- Complex_Representation --
----------------------------
-- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
when Pragma_Complex_Representation => Complex_Representation : declare
E_Id : Entity_Id;
E : Entity_Id;
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if not Is_Record_Type (E) then
Error_Pragma_Arg
("argument for pragma% must be record type", Arg1);
end if;
Ent := First_Entity (E);
if No (Ent)
or else No (Next_Entity (Ent))
or else Present (Next_Entity (Next_Entity (Ent)))
or else not Is_Floating_Point_Type (Etype (Ent))
or else Etype (Ent) /= Etype (Next_Entity (Ent))
then
Error_Pragma_Arg
("record for pragma% must have two fields of same fpt type",
Arg1);
else
Set_Has_Complex_Representation (Base_Type (E));
end if;
end Complex_Representation;
-------------------------
-- Component_Alignment --
-------------------------
-- pragma Component_Alignment (
-- [Form =>] ALIGNMENT_CHOICE
-- [, [Name =>] type_LOCAL_NAME]);
--
-- ALIGNMENT_CHOICE ::=
-- Component_Size
-- | Component_Size_4
-- | Storage_Unit
-- | Default
when Pragma_Component_Alignment => Component_AlignmentP : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Form,
Name_Name);
Form : Node_Id renames Args (1);
Name : Node_Id renames Args (2);
Atype : Component_Alignment_Kind;
Typ : Entity_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
if No (Form) then
Error_Pragma ("missing Form argument for pragma%");
end if;
Check_Arg_Is_Identifier (Form);
-- Get proper alignment, note that Default = Component_Size
-- on all machines we have so far, and we want to set this
-- value rather than the default value to indicate that it
-- has been explicitly set (and thus will not get overridden
-- by the default component alignment for the current scope)
if Chars (Form) = Name_Component_Size then
Atype := Calign_Component_Size;
elsif Chars (Form) = Name_Component_Size_4 then
Atype := Calign_Component_Size_4;
elsif Chars (Form) = Name_Default then
Atype := Calign_Component_Size;
elsif Chars (Form) = Name_Storage_Unit then
Atype := Calign_Storage_Unit;
else
Error_Pragma_Arg
("invalid Form parameter for pragma%", Form);
end if;
-- Case with no name, supplied, affects scope table entry
if No (Name) then
Scope_Stack.Table
(Scope_Stack.Last).Component_Alignment_Default := Atype;
-- Case of name supplied
else
Check_Arg_Is_Local_Name (Name);
Find_Type (Name);
Typ := Entity (Name);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Record_Type (Typ)
and then not Is_Array_Type (Typ)
then
Error_Pragma_Arg
("Name parameter of pragma% must identify record or " &
"array type", Name);
end if;
-- An explicit Component_Alignment pragma overrides an
-- implicit pragma Pack, but not an explicit one.
if not Has_Pragma_Pack (Base_Type (Typ)) then
Set_Is_Packed (Base_Type (Typ), False);
Set_Component_Alignment (Base_Type (Typ), Atype);
end if;
end if;
end Component_AlignmentP;
----------------
-- Controlled --
----------------
-- pragma Controlled (first_subtype_LOCAL_NAME);
when Pragma_Controlled => Controlled : declare
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
if not Is_Entity_Name (Arg)
or else not Is_Access_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires access type", Arg1);
else
Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
end if;
end Controlled;
----------------
-- Convention --
----------------
-- pragma Convention ([Convention =>] convention_IDENTIFIER,
-- [Entity =>] LOCAL_NAME);
when Pragma_Convention => Convention : declare
C : Convention_Id;
E : Entity_Id;
begin
Check_Arg_Order ((Name_Convention, Name_Entity));
Check_Ada_83_Warning;
Check_Arg_Count (2);
Process_Convention (C, E);
end Convention;
---------------------------
-- Convention_Identifier --
---------------------------
-- pragma Convention_Identifier ([Name =>] IDENTIFIER,
-- [Convention =>] convention_IDENTIFIER);
when Pragma_Convention_Identifier => Convention_Identifier : declare
Idnam : Name_Id;
Cname : Name_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Name, Name_Convention));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Optional_Identifier (Arg2, Name_Convention);
Check_Arg_Is_Identifier (Arg1);
Check_Arg_Is_Identifier (Arg1);
Idnam := Chars (Expression (Arg1));
Cname := Chars (Expression (Arg2));
if Is_Convention_Name (Cname) then
Record_Convention_Identifier
(Idnam, Get_Convention_Id (Cname));
else
Error_Pragma_Arg
("second arg for % pragma must be convention", Arg2);
end if;
end Convention_Identifier;
---------------
-- CPP_Class --
---------------
-- pragma CPP_Class ([Entity =>] local_NAME)
when Pragma_CPP_Class => CPP_Class : declare
Arg : Node_Id;
Typ : Entity_Id;
Default_DTC : Entity_Id := Empty;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
C : Entity_Id;
Tag_C : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else not Is_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
end if;
Typ := Entity (Arg);
if not Is_Record_Type (Typ) then
Error_Pragma_Arg ("pragma% applicable to a record, "
& "tagged record or record extension", Arg1);
end if;
Default_DTC := First_Component (Typ);
while Present (Default_DTC)
and then Etype (Default_DTC) /= VTP_Type
loop
Next_Component (Default_DTC);
end loop;
-- Case of non tagged type
if not Is_Tagged_Type (Typ) then
Set_Is_CPP_Class (Typ);
if Present (Default_DTC) then
Error_Pragma_Arg
("only tagged records can contain vtable pointers", Arg1);
end if;
-- Case of tagged type with no user-defined vtable ptr. In this
-- case, because of our C++ ABI compatibility, the programmer
-- does not need to specify the tag component.
elsif Is_Tagged_Type (Typ)
and then No (Default_DTC)
then
Set_Is_CPP_Class (Typ);
Set_Is_Limited_Record (Typ);
-- Tagged type that has a vtable ptr
elsif Present (Default_DTC) then
Set_Is_CPP_Class (Typ);
Set_Is_Limited_Record (Typ);
Set_Is_Tag (Default_DTC);
Set_DT_Entry_Count (Default_DTC, No_Uint);
-- Since a CPP type has no direct link to its associated tag
-- most tags checks cannot be performed
Set_Kill_Tag_Checks (Typ);
Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
-- Get rid of the _tag component when there was one.
-- It is only useful for regular tagged types
if Expander_Active and then Typ = Root_Type (Typ) then
Tag_C := First_Tag_Component (Typ);
C := First_Entity (Typ);
if C = Tag_C then
Set_First_Entity (Typ, Next_Entity (Tag_C));
else
while Next_Entity (C) /= Tag_C loop
Next_Entity (C);
end loop;
Set_Next_Entity (C, Next_Entity (Tag_C));
end if;
end if;
end if;
end CPP_Class;
---------------------
-- CPP_Constructor --
---------------------
-- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
when Pragma_CPP_Constructor => CPP_Constructor : declare
Id : Entity_Id;
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
Find_Program_Unit_Name (Id);
-- If we did not find the name, we are done
if Etype (Id) = Any_Type then
return;
end if;
Def_Id := Entity (Id);
if Ekind (Def_Id) = E_Function
and then Is_Class_Wide_Type (Etype (Def_Id))
and then Is_CPP_Class (Etype (Etype (Def_Id)))
then
-- What the heck is this??? this pragma allows only 1 arg
if Arg_Count >= 2 then
Check_At_Most_N_Arguments (3);
Process_Interface_Name (Def_Id, Arg2, Arg3);
end if;
if No (Parameter_Specifications (Parent (Def_Id))) then
Set_Has_Completion (Def_Id);
Set_Is_Constructor (Def_Id);
else
Error_Pragma_Arg
("non-default constructors not implemented", Arg1);
end if;
else
Error_Pragma_Arg
("pragma% requires function returning a 'C'P'P_Class type",
Arg1);
end if;
end CPP_Constructor;
-----------------
-- CPP_Virtual --
-----------------
-- pragma CPP_Virtual
-- [Entity =>] LOCAL_NAME
-- [ [Vtable_Ptr =>] LOCAL_NAME,
-- [Position =>] static_integer_EXPRESSION]);
when Pragma_CPP_Virtual => CPP_Virtual : declare
Arg : Node_Id;
Typ : Entity_Id;
Subp : Entity_Id;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
DTC : Entity_Id;
V : Uint;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Vtable_Ptr, Name_Position));
if Arg_Count = 3 then
Check_Optional_Identifier (Arg2, Name_Vtable_Ptr);
-- We allow Entry_Count as well as Position for the third
-- parameter for back compatibility with versions of GNAT
-- before version 3.12. The documentation has always said
-- Position, but the code up to 3.12 said Entry_Count.
if Chars (Arg3) /= Name_Entry_Count then
Check_Optional_Identifier (Arg3, Name_Position);
end if;
else
Check_Arg_Count (1);
end if;
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
-- First argument must be a subprogram name
Arg := Expression (Arg1);
Find_Program_Unit_Name (Arg);
if Etype (Arg) = Any_Type then
return;
else
Subp := Entity (Arg);
end if;
if not (Is_Subprogram (Subp)
and then Is_Dispatching_Operation (Subp))
then
Error_Pragma_Arg
("pragma% must reference a primitive operation", Arg1);
end if;
Typ := Find_Dispatching_Type (Subp);
-- If only one Argument defaults are :
-- . DTC_Entity is the default Vtable pointer
-- . DT_Position will be set at the freezing point
if Arg_Count = 1 then
Set_DTC_Entity (Subp, First_Tag_Component (Typ));
return;
end if;
-- Second argument is a component name of type Vtable_Ptr
Arg := Expression (Arg2);
if Nkind (Arg) /= N_Identifier then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
end if;
DTC := First_Component (Typ);
while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
Next_Component (DTC);
end loop;
-- Case of tagged type with no user-defined vtable ptr
if No (DTC) then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
elsif Etype (DTC) /= VTP_Type then
Wrong_Type (Arg, VTP_Type);
return;
end if;
-- Third argument is an integer (DT_Position)
Arg := Expression (Arg3);
Analyze_And_Resolve (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("third argument of pragma CPP_Virtual must be static!",
Arg3);
raise Pragma_Exit;
else
V := Expr_Value (Expression (Arg3));
if V <= 0 then
Error_Pragma_Arg
("third argument of pragma% must be positive",
Arg3);
else
Set_DTC_Entity (Subp, DTC);
Set_DT_Position (Subp, V);
end if;
end if;
end CPP_Virtual;
----------------
-- CPP_Vtable --
----------------
-- pragma CPP_Vtable (
-- [Entity =>] LOCAL_NAME
-- [Vtable_Ptr =>] LOCAL_NAME,
-- [Entry_Count =>] static_integer_EXPRESSION);
when Pragma_CPP_Vtable => CPP_Vtable : declare
Arg : Node_Id;
Typ : Entity_Id;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
DTC : Entity_Id;
V : Uint;
Elmt : Elmt_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Vtable_Ptr, Name_Entry_Count));
Check_Arg_Count (3);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Vtable_Ptr);
Check_Optional_Identifier (Arg3, Name_Entry_Count);
Check_Arg_Is_Local_Name (Arg1);
-- First argument is a record type name
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
else
Typ := Entity (Arg);
end if;
if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
end if;
-- Second argument is a component name of type Vtable_Ptr
Arg := Expression (Arg2);
if Nkind (Arg) /= N_Identifier then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
end if;
DTC := First_Component (Typ);
while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
Next_Component (DTC);
end loop;
if No (DTC) then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
elsif Etype (DTC) /= VTP_Type then
Wrong_Type (DTC, VTP_Type);
return;
-- If it is the first pragma Vtable, This becomes the default tag
elsif (not Is_Tag (DTC))
and then DT_Entry_Count (First_Tag_Component (Typ)) = No_Uint
then
Set_Is_Tag (First_Tag_Component (Typ), False);
Set_Is_Tag (DTC, True);
Set_DT_Entry_Count (DTC, No_Uint);
end if;
-- Those pragmas must appear before any primitive operation
-- definition (except inherited ones) otherwise the default
-- may be wrong
Elmt := First_Elmt (Primitive_Operations (Typ));
while Present (Elmt) loop
if No (Alias (Node (Elmt))) then
Error_Msg_Sloc := Sloc (Node (Elmt));
Error_Pragma
("pragma% must appear before this primitive operation");
end if;
Next_Elmt (Elmt);
end loop;
-- Third argument is an integer (DT_Entry_Count)
Arg := Expression (Arg3);
Analyze_And_Resolve (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("entry count for pragma CPP_Vtable must be a static " &
"expression!", Arg3);
raise Pragma_Exit;
else
V := Expr_Value (Expression (Arg3));
if V <= 0 then
Error_Pragma_Arg
("entry count for pragma% must be positive", Arg3);
else
Set_DT_Entry_Count (DTC, V);
end if;
end if;
end CPP_Vtable;
-----------
-- Debug --
-----------
-- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
when Pragma_Debug => Debug : declare
Cond : Node_Id;
begin
GNAT_Pragma;
Cond :=
New_Occurrence_Of
(Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
Loc);
if Arg_Count = 2 then
Cond :=
Make_And_Then (Loc,
Left_Opnd => Relocate_Node (Cond),
Right_Opnd => Expression (Arg1));
end if;
-- Rewrite into a conditional with an appropriate condition. We
-- wrap the procedure call in a block so that overhead from e.g.
-- use of the secondary stack does not generate execution overhead
-- for suppressed conditions.
Rewrite (N, Make_Implicit_If_Statement (N,
Condition => Cond,
Then_Statements => New_List (
Make_Block_Statement (Loc,
Handled_Statement_Sequence =>
Make_Handled_Sequence_Of_Statements (Loc,
Statements => New_List (
Relocate_Node (Debug_Statement (N))))))));
Analyze (N);
end Debug;
------------------
-- Debug_Policy --
------------------
-- pragma Debug_Policy (Check | Ignore)
when Pragma_Debug_Policy =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
---------------------
-- Detect_Blocking --
---------------------
-- pragma Detect_Blocking;
when Pragma_Detect_Blocking =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Detect_Blocking := True;
-------------------
-- Discard_Names --
-------------------
-- pragma Discard_Names [([On =>] LOCAL_NAME)];
when Pragma_Discard_Names => Discard_Names : declare
E_Id : Entity_Id;
E : Entity_Id;
begin
Check_Ada_83_Warning;
-- Deal with configuration pragma case
if Arg_Count = 0 and then Is_Configuration_Pragma then
Global_Discard_Names := True;
return;
-- Otherwise, check correct appropriate context
else
Check_Is_In_Decl_Part_Or_Package_Spec;
if Arg_Count = 0 then
-- If there is no parameter, then from now on this pragma
-- applies to any enumeration, exception or tagged type
-- defined in the current declarative part.
Set_Discard_Names (Current_Scope);
return;
else
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_On);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
else
E := Entity (E_Id);
end if;
if (Is_First_Subtype (E)
and then (Is_Enumeration_Type (E)
or else Is_Tagged_Type (E)))
or else Ekind (E) = E_Exception
then
Set_Discard_Names (E);
else
Error_Pragma_Arg
("inappropriate entity for pragma%", Arg1);
end if;
end if;
end if;
end Discard_Names;
---------------
-- Elaborate --
---------------
-- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
when Pragma_Elaborate => Elaborate : declare
Arg : Node_Id;
Citem : Node_Id;
begin
-- Pragma must be in context items list of a compilation unit
if not Is_In_Context_Clause then
Pragma_Misplaced;
end if;
-- Must be at least one argument
if Arg_Count = 0 then
Error_Pragma ("pragma% requires at least one argument");
end if;
-- In Ada 83 mode, there can be no items following it in the
-- context list except other pragmas and implicit with clauses
-- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
-- placement rule does not apply.
if Ada_Version = Ada_83 and then Comes_From_Source (N) then
Citem := Next (N);
while Present (Citem) loop
if Nkind (Citem) = N_Pragma
or else (Nkind (Citem) = N_With_Clause
and then Implicit_With (Citem))
then
null;
else
Error_Pragma
("(Ada 83) pragma% must be at end of context clause");
end if;
Next (Citem);
end loop;
end if;
-- Finally, the arguments must all be units mentioned in a with
-- clause in the same context clause. Note we already checked (in
-- Par.Prag) that the arguments are all identifiers or selected
-- components.
Arg := Arg1;
Outer : while Present (Arg) loop
Citem := First (List_Containing (N));
Inner : while Citem /= N loop
if Nkind (Citem) = N_With_Clause
and then Same_Name (Name (Citem), Expression (Arg))
then
Set_Elaborate_Present (Citem, True);
Set_Unit_Name (Expression (Arg), Name (Citem));
-- With the pragma present, elaboration calls on
-- subprograms from the named unit need no further
-- checks, as long as the pragma appears in the current
-- compilation unit. If the pragma appears in some unit
-- in the context, there might still be a need for an
-- Elaborate_All_Desirable from the current compilation
-- to the the named unit, so we keep the check enabled.
if In_Extended_Main_Source_Unit (N) then
Set_Suppress_Elaboration_Warnings
(Entity (Name (Citem)));
end if;
exit Inner;
end if;
Next (Citem);
end loop Inner;
if Citem = N then
Error_Pragma_Arg
("argument of pragma% is not with'ed unit", Arg);
end if;
Next (Arg);
end loop Outer;
-- Give a warning if operating in static mode with -gnatwl
-- (elaboration warnings eanbled) switch set.
if Elab_Warnings and not Dynamic_Elaboration_Checks then
Error_Msg_N
("?use of pragma Elaborate may not be safe", N);
Error_Msg_N
("?use pragma Elaborate_All instead if possible", N);
end if;
end Elaborate;
-------------------
-- Elaborate_All --
-------------------
-- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
when Pragma_Elaborate_All => Elaborate_All : declare
Arg : Node_Id;
Citem : Node_Id;
begin
Check_Ada_83_Warning;
-- Pragma must be in context items list of a compilation unit
if not Is_In_Context_Clause then
Pragma_Misplaced;
end if;
-- Must be at least one argument
if Arg_Count = 0 then
Error_Pragma ("pragma% requires at least one argument");
end if;
-- Note: unlike pragma Elaborate, pragma Elaborate_All does not
-- have to appear at the end of the context clause, but may
-- appear mixed in with other items, even in Ada 83 mode.
-- Final check: the arguments must all be units mentioned in
-- a with clause in the same context clause. Note that we
-- already checked (in Par.Prag) that all the arguments are
-- either identifiers or selected components.
Arg := Arg1;
Outr : while Present (Arg) loop
Citem := First (List_Containing (N));
Innr : while Citem /= N loop
if Nkind (Citem) = N_With_Clause
and then Same_Name (Name (Citem), Expression (Arg))
then
Set_Elaborate_All_Present (Citem, True);
Set_Unit_Name (Expression (Arg), Name (Citem));
-- Suppress warnings and elaboration checks on the named
-- unit if the pragma is in the current compilation, as
-- for pragma Elaborate.
if In_Extended_Main_Source_Unit (N) then
Set_Suppress_Elaboration_Warnings
(Entity (Name (Citem)));
end if;
exit Innr;
end if;
Next (Citem);
end loop Innr;
if Citem = N then
Set_Error_Posted (N);
Error_Pragma_Arg
("argument of pragma% is not with'ed unit", Arg);
end if;
Next (Arg);
end loop Outr;
end Elaborate_All;
--------------------
-- Elaborate_Body --
--------------------
-- pragma Elaborate_Body [( library_unit_NAME )];
when Pragma_Elaborate_Body => Elaborate_Body : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) = N_Package_Body
or else
Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
then
Error_Pragma ("pragma% must refer to a spec, not a body");
else
Set_Body_Required (Cunit_Node, True);
Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
-- If we are in dynamic elaboration mode, then we suppress
-- elaboration warnings for the unit, since it is definitely
-- fine NOT to do dynamic checks at the first level (and such
-- checks will be suppressed because no elaboration boolean
-- is created for Elaborate_Body packages).
-- But in the static model of elaboration, Elaborate_Body is
-- definitely NOT good enough to ensure elaboration safety on
-- its own, since the body may WITH other units that are not
-- safe from an elaboration point of view, so a client must
-- still do an Elaborate_All on such units.
-- Debug flag -gnatdD restores the old behavior of 3.13,
-- where Elaborate_Body always suppressed elab warnings.
if Dynamic_Elaboration_Checks or Debug_Flag_DD then
Set_Suppress_Elaboration_Warnings (Cunit_Ent);
end if;
end if;
end Elaborate_Body;
------------------------
-- Elaboration_Checks --
------------------------
-- pragma Elaboration_Checks (Static | Dynamic);
when Pragma_Elaboration_Checks =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
Dynamic_Elaboration_Checks :=
(Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
---------------
-- Eliminate --
---------------
-- pragma Eliminate (
-- [Unit_Name =>] IDENTIFIER |
-- SELECTED_COMPONENT
-- [,[Entity =>] IDENTIFIER |
-- SELECTED_COMPONENT |
-- STRING_LITERAL]
-- [,]OVERLOADING_RESOLUTION);
-- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
-- SOURCE_LOCATION
-- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
-- FUNCTION_PROFILE
-- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
-- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
-- Result_Type => result_SUBTYPE_NAME]
-- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
-- SUBTYPE_NAME ::= STRING_LITERAL
-- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
-- SOURCE_TRACE ::= STRING_LITERAL
when Pragma_Eliminate => Eliminate : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Unit_Name,
Name_Entity,
Name_Parameter_Types,
Name_Result_Type,
Name_Source_Location);
Unit_Name : Node_Id renames Args (1);
Entity : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Source_Location : Node_Id renames Args (5);
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Gather_Associations (Names, Args);
if No (Unit_Name) then
Error_Pragma ("missing Unit_Name argument for pragma%");
end if;
if No (Entity)
and then (Present (Parameter_Types)
or else
Present (Result_Type)
or else
Present (Source_Location))
then
Error_Pragma ("missing Entity argument for pragma%");
end if;
if (Present (Parameter_Types)
or else
Present (Result_Type))
and then
Present (Source_Location)
then
Error_Pragma
("parameter profile and source location cannot " &
"be used together in pragma%");
end if;
Process_Eliminate_Pragma
(N,
Unit_Name,
Entity,
Parameter_Types,
Result_Type,
Source_Location);
end Eliminate;
-------------------------
-- Explicit_Overriding --
-------------------------
when Pragma_Explicit_Overriding =>
Check_Valid_Configuration_Pragma;
Check_Arg_Count (0);
Explicit_Overriding := True;
------------
-- Export --
------------
-- pragma Export (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Export => Export : declare
C : Convention_Id;
Def_Id : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Convention (C, Def_Id);
if Ekind (Def_Id) /= E_Constant then
Note_Possible_Modification (Expression (Arg2));
end if;
Process_Interface_Name (Def_Id, Arg3, Arg4);
Set_Exported (Def_Id, Arg2);
end Export;
----------------------
-- Export_Exception --
----------------------
-- pragma Export_Exception (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Form =>] Ada | VMS]
-- [, [Code =>] static_integer_EXPRESSION]);
when Pragma_Export_Exception => Export_Exception : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Form,
Name_Code);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Form : Node_Id renames Args (3);
Code : Node_Id renames Args (4);
begin
if Inside_A_Generic then
Error_Pragma ("pragma% cannot be used for generic entities");
end if;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Exception_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Form => Form,
Arg_Code => Code);
if not Is_VMS_Exception (Entity (Internal)) then
Set_Exported (Entity (Internal), Internal);
end if;
end Export_Exception;
---------------------
-- Export_Function --
---------------------
-- pragma Export_Function (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Result_Type =>] TYPE_DESIGNATOR]
-- [, [Mechanism =>] MECHANISM]
-- [, [Result_Mechanism =>] MECHANISM_NAME]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Function => Export_Function : declare
Args : Args_List (1 .. 6);
Names : constant Name_List (1 .. 6) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Result_Type,
Name_Mechanism,
Name_Result_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Mechanism : Node_Id renames Args (5);
Result_Mechanism : Node_Id renames Args (6);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Result_Type => Result_Type,
Arg_Mechanism => Mechanism,
Arg_Result_Mechanism => Result_Mechanism);
end Export_Function;
-------------------
-- Export_Object --
-------------------
-- pragma Export_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Object => Export_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Object_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Size => Size);
end Export_Object;
----------------------
-- Export_Procedure --
----------------------
-- pragma Export_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Procedure => Export_Procedure : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism);
end Export_Procedure;
------------------
-- Export_Value --
------------------
-- pragma Export_Value (
-- [Value =>] static_integer_EXPRESSION,
-- [Link_Name =>] static_string_EXPRESSION);
when Pragma_Export_Value =>
GNAT_Pragma;
Check_Arg_Order ((Name_Value, Name_Link_Name));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Value);
Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
Check_Optional_Identifier (Arg2, Name_Link_Name);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-----------------------------
-- Export_Valued_Procedure --
-----------------------------
-- pragma Export_Valued_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Valued_Procedure =>
Export_Valued_Procedure : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism);
end Export_Valued_Procedure;
-------------------
-- Extend_System --
-------------------
-- pragma Extend_System ([Name =>] Identifier);
when Pragma_Extend_System => Extend_System : declare
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Arg_Is_Identifier (Arg1);
Get_Name_String (Chars (Expression (Arg1)));
if Name_Len > 4
and then Name_Buffer (1 .. 4) = "aux_"
then
if Present (System_Extend_Pragma_Arg) then
if Chars (Expression (Arg1)) =
Chars (Expression (System_Extend_Pragma_Arg))
then
null;
else
Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
Error_Pragma ("pragma% conflicts with that at#");
end if;
else
System_Extend_Pragma_Arg := Arg1;
if not GNAT_Mode then
System_Extend_Unit := Arg1;
end if;
end if;
else
Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
end if;
end Extend_System;
------------------------
-- Extensions_Allowed --
------------------------
-- pragma Extensions_Allowed (ON | OFF);
when Pragma_Extensions_Allowed =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
if Chars (Expression (Arg1)) = Name_On then
Extensions_Allowed := True;
Ada_Version := Ada_Version_Type'Last;
else
Extensions_Allowed := False;
Ada_Version := Ada_Version_Type'Min (Ada_Version, Ada_95);
end if;
Ada_Version_Explicit := Ada_Version;
--------------
-- External --
--------------
-- pragma External (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_External => External : declare
C : Convention_Id;
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Convention (C, Def_Id);
Note_Possible_Modification (Expression (Arg2));
Process_Interface_Name (Def_Id, Arg3, Arg4);
Set_Exported (Def_Id, Arg2);
end External;
--------------------------
-- External_Name_Casing --
--------------------------
-- pragma External_Name_Casing (
-- UPPERCASE | LOWERCASE
-- [, AS_IS | UPPERCASE | LOWERCASE]);
when Pragma_External_Name_Casing => External_Name_Casing : declare
begin
GNAT_Pragma;
Check_No_Identifiers;
if Arg_Count = 2 then
Check_Arg_Is_One_Of
(Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
case Chars (Get_Pragma_Arg (Arg2)) is
when Name_As_Is =>
Opt.External_Name_Exp_Casing := As_Is;
when Name_Uppercase =>
Opt.External_Name_Exp_Casing := Uppercase;
when Name_Lowercase =>
Opt.External_Name_Exp_Casing := Lowercase;
when others =>
null;
end case;
else
Check_Arg_Count (1);
end if;
Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
case Chars (Get_Pragma_Arg (Arg1)) is
when Name_Uppercase =>
Opt.External_Name_Imp_Casing := Uppercase;
when Name_Lowercase =>
Opt.External_Name_Imp_Casing := Lowercase;
when others =>
null;
end case;
end External_Name_Casing;
---------------------------
-- Finalize_Storage_Only --
---------------------------
-- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
Assoc : constant Node_Id := Arg1;
Type_Id : constant Node_Id := Expression (Assoc);
Typ : Entity_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Controlled (Typ) then
Error_Pragma ("pragma% must specify controlled type");
end if;
Check_First_Subtype (Arg1);
if Finalize_Storage_Only (Typ) then
Error_Pragma ("duplicate pragma%, only one allowed");
elsif not Rep_Item_Too_Late (Typ, N) then
Set_Finalize_Storage_Only (Base_Type (Typ), True);
end if;
end Finalize_Storage;
--------------------------
-- Float_Representation --
--------------------------
-- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
-- FLOAT_REP ::= VAX_Float | IEEE_Float
when Pragma_Float_Representation => Float_Representation : declare
Argx : Node_Id;
Digs : Nat;
Ent : Entity_Id;
begin
GNAT_Pragma;
if Arg_Count = 1 then
Check_Valid_Configuration_Pragma;
else
Check_Arg_Count (2);
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg2);
end if;
Check_No_Identifier (Arg1);
Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
if not OpenVMS_On_Target then
if Chars (Expression (Arg1)) = Name_VAX_Float then
Error_Pragma
("?pragma% ignored (applies only to Open'V'M'S)");
end if;
return;
end if;
-- One argument case
if Arg_Count = 1 then
if Chars (Expression (Arg1)) = Name_VAX_Float then
if Opt.Float_Format = 'I' then
Error_Pragma ("'I'E'E'E format previously specified");
end if;
Opt.Float_Format := 'V';
else
if Opt.Float_Format = 'V' then
Error_Pragma ("'V'A'X format previously specified");
end if;
Opt.Float_Format := 'I';
end if;
Set_Standard_Fpt_Formats;
-- Two argument case
else
Argx := Get_Pragma_Arg (Arg2);
if not Is_Entity_Name (Argx)
or else not Is_Floating_Point_Type (Entity (Argx))
then
Error_Pragma_Arg
("second argument of% pragma must be floating-point type",
Arg2);
end if;
Ent := Entity (Argx);
Digs := UI_To_Int (Digits_Value (Ent));
-- Two arguments, VAX_Float case
if Chars (Expression (Arg1)) = Name_VAX_Float then
case Digs is
when 6 => Set_F_Float (Ent);
when 9 => Set_D_Float (Ent);
when 15 => Set_G_Float (Ent);
when others =>
Error_Pragma_Arg
("wrong digits value, must be 6,9 or 15", Arg2);
end case;
-- Two arguments, IEEE_Float case
else
case Digs is
when 6 => Set_IEEE_Short (Ent);
when 15 => Set_IEEE_Long (Ent);
when others =>
Error_Pragma_Arg
("wrong digits value, must be 6 or 15", Arg2);
end case;
end if;
end if;
end Float_Representation;
-----------
-- Ident --
-----------
-- pragma Ident (static_string_EXPRESSION)
-- Note: pragma Comment shares this processing. Pragma Comment
-- is identical to Ident, except that the restriction of the
-- argument to 31 characters and the placement restrictions
-- are not enforced for pragma Comment.
when Pragma_Ident | Pragma_Comment => Ident : declare
Str : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
-- For pragma Ident, preserve DEC compatibility by requiring
-- the pragma to appear in a declarative part or package spec.
if Prag_Id = Pragma_Ident then
Check_Is_In_Decl_Part_Or_Package_Spec;
end if;
Str := Expr_Value_S (Expression (Arg1));
declare
CS : Node_Id;
GP : Node_Id;
begin
GP := Parent (Parent (N));
if Nkind (GP) = N_Package_Declaration
or else
Nkind (GP) = N_Generic_Package_Declaration
then
GP := Parent (GP);
end if;
-- If we have a compilation unit, then record the ident
-- value, checking for improper duplication.
if Nkind (GP) = N_Compilation_Unit then
CS := Ident_String (Current_Sem_Unit);
if Present (CS) then
-- For Ident, we do not permit multiple instances
if Prag_Id = Pragma_Ident then
Error_Pragma ("duplicate% pragma not permitted");
-- For Comment, we concatenate the string, unless we
-- want to preserve the tree structure for ASIS.
elsif not ASIS_Mode then
Start_String (Strval (CS));
Store_String_Char (' ');
Store_String_Chars (Strval (Str));
Set_Strval (CS, End_String);
end if;
else
-- In VMS, the effect of IDENT is achieved by passing
-- IDENTIFICATION=name as a --for-linker switch.
if OpenVMS_On_Target then
Start_String;
Store_String_Chars
("--for-linker=IDENTIFICATION=");
String_To_Name_Buffer (Strval (Str));
Store_String_Chars (Name_Buffer (1 .. Name_Len));
-- Only the last processed IDENT is saved. The main
-- purpose is so an IDENT associated with a main
-- procedure will be used in preference to an IDENT
-- associated with a with'd package.
Replace_Linker_Option_String
(End_String, "--for-linker=IDENTIFICATION=");
end if;
Set_Ident_String (Current_Sem_Unit, Str);
end if;
-- For subunits, we just ignore the Ident, since in GNAT
-- these are not separate object files, and hence not
-- separate units in the unit table.
elsif Nkind (GP) = N_Subunit then
null;
-- Otherwise we have a misplaced pragma Ident, but we ignore
-- this if we are in an instantiation, since it comes from
-- a generic, and has no relevance to the instantiation.
elsif Prag_Id = Pragma_Ident then
if Instantiation_Location (Loc) = No_Location then
Error_Pragma ("pragma% only allowed at outer level");
end if;
end if;
end;
end Ident;
------------
-- Import --
------------
-- pragma Import (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Import =>
Check_Ada_83_Warning;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Import_Or_Interface;
----------------------
-- Import_Exception --
----------------------
-- pragma Import_Exception (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Form =>] Ada | VMS]
-- [, [Code =>] static_integer_EXPRESSION]);
when Pragma_Import_Exception => Import_Exception : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Form,
Name_Code);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Form : Node_Id renames Args (3);
Code : Node_Id renames Args (4);
begin
Gather_Associations (Names, Args);
if Present (External) and then Present (Code) then
Error_Pragma
("cannot give both External and Code options for pragma%");
end if;
Process_Extended_Import_Export_Exception_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Form => Form,
Arg_Code => Code);
if not Is_VMS_Exception (Entity (Internal)) then
Set_Imported (Entity (Internal));
end if;
end Import_Exception;
---------------------
-- Import_Function --
---------------------
-- pragma Import_Function (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Result_Type =>] SUBTYPE_MARK]
-- [, [Mechanism =>] MECHANISM]
-- [, [Result_Mechanism =>] MECHANISM_NAME]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Function => Import_Function : declare
Args : Args_List (1 .. 7);
Names : constant Name_List (1 .. 7) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Result_Type,
Name_Mechanism,
Name_Result_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Mechanism : Node_Id renames Args (5);
Result_Mechanism : Node_Id renames Args (6);
First_Optional_Parameter : Node_Id renames Args (7);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Result_Type => Result_Type,
Arg_Mechanism => Mechanism,
Arg_Result_Mechanism => Result_Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Function;
-------------------
-- Import_Object --
-------------------
-- pragma Import_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
when Pragma_Import_Object => Import_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Object_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Size => Size);
end Import_Object;
----------------------
-- Import_Procedure --
----------------------
-- pragma Import_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Procedure => Import_Procedure : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
First_Optional_Parameter : Node_Id renames Args (5);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Procedure;
-----------------------------
-- Import_Valued_Procedure --
-----------------------------
-- pragma Import_Valued_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Valued_Procedure =>
Import_Valued_Procedure : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
First_Optional_Parameter : Node_Id renames Args (5);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Valued_Procedure;
------------------------
-- Initialize_Scalars --
------------------------
-- pragma Initialize_Scalars;
when Pragma_Initialize_Scalars =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Check_Restriction (No_Initialize_Scalars, N);
if not Restriction_Active (No_Initialize_Scalars) then
Init_Or_Norm_Scalars := True;
Initialize_Scalars := True;
end if;
------------
-- Inline --
------------
-- pragma Inline ( NAME {, NAME} );
when Pragma_Inline =>
-- Pragma is active if inlining option is active
Process_Inline (Inline_Active);
-------------------
-- Inline_Always --
-------------------
-- pragma Inline_Always ( NAME {, NAME} );
when Pragma_Inline_Always =>
Process_Inline (True);
--------------------
-- Inline_Generic --
--------------------
-- pragma Inline_Generic (NAME {, NAME});
when Pragma_Inline_Generic =>
Process_Generic_List;
----------------------
-- Inspection_Point --
----------------------
-- pragma Inspection_Point [(object_NAME {, object_NAME})];
when Pragma_Inspection_Point => Inspection_Point : declare
Arg : Node_Id;
Exp : Node_Id;
begin
if Arg_Count > 0 then
Arg := Arg1;
loop
Exp := Expression (Arg);
Analyze (Exp);
if not Is_Entity_Name (Exp)
or else not Is_Object (Entity (Exp))
then
Error_Pragma_Arg ("object name required", Arg);
end if;
Next (Arg);
exit when No (Arg);
end loop;
end if;
end Inspection_Point;
---------------
-- Interface --
---------------
-- pragma Interface (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Interface =>
GNAT_Pragma;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Import_Or_Interface;
--------------------
-- Interface_Name --
--------------------
-- pragma Interface_Name (
-- [ Entity =>] local_NAME
-- [,[External_Name =>] static_string_EXPRESSION ]
-- [,[Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Interface_Name => Interface_Name : declare
Id : Node_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
Found : Boolean;
begin
GNAT_Pragma;
Check_Arg_Order
((Name_Entity, Name_External_Name, Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (3);
Id := Expression (Arg1);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg
("first argument for pragma% must be entity name", Arg1);
elsif Etype (Id) = Any_Type then
return;
else
Def_Id := Entity (Id);
end if;
-- Special DEC-compatible processing for the object case,
-- forces object to be imported.
if Ekind (Def_Id) = E_Variable then
Kill_Size_Check_Code (Def_Id);
Note_Possible_Modification (Id);
-- Initialization is not allowed for imported variable
if Present (Expression (Parent (Def_Id)))
and then Comes_From_Source (Expression (Parent (Def_Id)))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
Arg2);
else
-- For compatibility, support VADS usage of providing both
-- pragmas Interface and Interface_Name to obtain the effect
-- of a single Import pragma.
if Is_Imported (Def_Id)
and then Present (First_Rep_Item (Def_Id))
and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
then
null;
else
Set_Imported (Def_Id);
end if;
Set_Is_Public (Def_Id);
Process_Interface_Name (Def_Id, Arg2, Arg3);
end if;
-- Otherwise must be subprogram
elsif not Is_Subprogram (Def_Id) then
Error_Pragma_Arg
("argument of pragma% is not subprogram", Arg1);
else
Check_At_Most_N_Arguments (3);
Hom_Id := Def_Id;
Found := False;
-- Loop through homonyms
loop
Def_Id := Get_Base_Subprogram (Hom_Id);
if Is_Imported (Def_Id) then
Process_Interface_Name (Def_Id, Arg2, Arg3);
Found := True;
end if;
Hom_Id := Homonym (Hom_Id);
exit when No (Hom_Id)
or else Scope (Hom_Id) /= Current_Scope;
end loop;
if not Found then
Error_Pragma_Arg
("argument of pragma% is not imported subprogram",
Arg1);
end if;
end if;
end Interface_Name;
-----------------------
-- Interrupt_Handler --
-----------------------
-- pragma Interrupt_Handler (handler_NAME);
when Pragma_Interrupt_Handler =>
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
if No_Run_Time_Mode then
Error_Msg_CRT ("Interrupt_Handler pragma", N);
else
Check_Interrupt_Or_Attach_Handler;
Process_Interrupt_Or_Attach_Handler;
end if;
------------------------
-- Interrupt_Priority --
------------------------
-- pragma Interrupt_Priority [(EXPRESSION)];
when Pragma_Interrupt_Priority => Interrupt_Priority : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_Ada_83_Warning;
if Arg_Count /= 0 then
Arg := Expression (Arg1);
Check_Arg_Count (1);
Check_No_Identifiers;
-- The expression must be analyzed in the special manner
-- described in "Handling of Default and Per-Object
-- Expressions" in sem.ads.
Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
end if;
if Nkind (P) /= N_Task_Definition
and then Nkind (P) /= N_Protected_Definition
then
Pragma_Misplaced;
return;
elsif Has_Priority_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Priority_Pragma (P, True);
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
end if;
end Interrupt_Priority;
---------------------
-- Interrupt_State --
---------------------
-- pragma Interrupt_State (
-- [Name =>] INTERRUPT_ID,
-- [State =>] INTERRUPT_STATE);
-- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
-- INTERRUPT_STATE => System | Runtime | User
-- Note: if the interrupt id is given as an identifier, then
-- it must be one of the identifiers in Ada.Interrupts.Names.
-- Otherwise it is given as a static integer expression which
-- must be in the range of Ada.Interrupts.Interrupt_ID.
when Pragma_Interrupt_State => Interrupt_State : declare
Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
-- This is the entity Ada.Interrupts.Interrupt_ID;
State_Type : Character;
-- Set to 's'/'r'/'u' for System/Runtime/User
IST_Num : Pos;
-- Index to entry in Interrupt_States table
Int_Val : Uint;
-- Value of interrupt
Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
-- The first argument to the pragma
Int_Ent : Entity_Id;
-- Interrupt entity in Ada.Interrupts.Names
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Name, Name_State));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Optional_Identifier (Arg2, Name_State);
Check_Arg_Is_Identifier (Arg2);
-- First argument is identifier
if Nkind (Arg1X) = N_Identifier then
-- Search list of names in Ada.Interrupts.Names
Int_Ent := First_Entity (RTE (RE_Names));
loop
if No (Int_Ent) then
Error_Pragma_Arg ("invalid interrupt name", Arg1);
elsif Chars (Int_Ent) = Chars (Arg1X) then
Int_Val := Expr_Value (Constant_Value (Int_Ent));
exit;
end if;
Next_Entity (Int_Ent);
end loop;
-- First argument is not an identifier, so it must be a
-- static expression of type Ada.Interrupts.Interrupt_ID.
else
Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
Int_Val := Expr_Value (Arg1X);
if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
or else
Int_Val > Expr_Value (Type_High_Bound (Int_Id))
then
Error_Pragma_Arg
("value not in range of type " &
"""Ada.Interrupts.Interrupt_'I'D""", Arg1);
end if;
end if;
-- Check OK state
case Chars (Get_Pragma_Arg (Arg2)) is
when Name_Runtime => State_Type := 'r';
when Name_System => State_Type := 's';
when Name_User => State_Type := 'u';
when others =>
Error_Pragma_Arg ("invalid interrupt state", Arg2);
end case;
-- Check if entry is already stored
IST_Num := Interrupt_States.First;
loop
-- If entry not found, add it
if IST_Num > Interrupt_States.Last then
Interrupt_States.Append
((Interrupt_Number => UI_To_Int (Int_Val),
Interrupt_State => State_Type,
Pragma_Loc => Loc));
exit;
-- Case of entry for the same entry
elsif Int_Val = Interrupt_States.Table (IST_Num).
Interrupt_Number
then
-- If state matches, done, no need to make redundant entry
exit when
State_Type = Interrupt_States.Table (IST_Num).
Interrupt_State;
-- Otherwise if state does not match, error
Error_Msg_Sloc :=
Interrupt_States.Table (IST_Num).Pragma_Loc;
Error_Pragma_Arg
("state conflicts with that given at #", Arg2);
exit;
end if;
IST_Num := IST_Num + 1;
end loop;
end Interrupt_State;
----------------------
-- Java_Constructor --
----------------------
-- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
when Pragma_Java_Constructor => Java_Constructor : declare
Id : Entity_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
Find_Program_Unit_Name (Id);
-- If we did not find the name, we are done
if Etype (Id) = Any_Type then
return;
end if;
Hom_Id := Entity (Id);
-- Loop through homonyms
loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- The constructor is required to be a function returning
-- an access type whose designated type has convention Java.
if Ekind (Def_Id) = E_Function
and then Ekind (Etype (Def_Id)) in Access_Kind
and then
(Atree.Convention
(Designated_Type (Etype (Def_Id))) = Convention_Java
or else
Atree.Convention
(Root_Type (Designated_Type (Etype (Def_Id))))
= Convention_Java)
then
Set_Is_Constructor (Def_Id);
Set_Convention (Def_Id, Convention_Java);
else
Error_Pragma_Arg
("pragma% requires function returning a 'Java access type",
Arg1);
end if;
Hom_Id := Homonym (Hom_Id);
exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
end loop;
end Java_Constructor;
----------------------
-- Java_Interface --
----------------------
-- pragma Java_Interface ([Entity =>] LOCAL_NAME);
when Pragma_Java_Interface => Java_Interface : declare
Arg : Node_Id;
Typ : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else not Is_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
end if;
Typ := Underlying_Type (Entity (Arg));
-- For now we simply check some of the semantic constraints
-- on the type. This currently leaves out some restrictions
-- on interface types, namely that the parent type must be
-- java.lang.Object.Typ and that all primitives of the type
-- should be declared abstract. ???
if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
Error_Pragma_Arg ("pragma% requires an abstract "
& "tagged type", Arg1);
elsif not Has_Discriminants (Typ)
or else Ekind (Etype (First_Discriminant (Typ)))
/= E_Anonymous_Access_Type
or else
not Is_Class_Wide_Type
(Designated_Type (Etype (First_Discriminant (Typ))))
then
Error_Pragma_Arg
("type must have a class-wide access discriminant", Arg1);
end if;
end Java_Interface;
----------------
-- Keep_Names --
----------------
-- pragma Keep_Names ([On => ] local_NAME);
when Pragma_Keep_Names => Keep_Names : declare
Arg : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_On);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else Ekind (Entity (Arg)) /= E_Enumeration_Type
then
Error_Pragma_Arg
("pragma% requires a local enumeration type", Arg1);
end if;
Set_Discard_Names (Entity (Arg), False);
end Keep_Names;
-------------
-- License --
-------------
-- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
when Pragma_License =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Valid_Configuration_Pragma;
Check_Arg_Is_Identifier (Arg1);
declare
Sind : constant Source_File_Index :=
Source_Index (Current_Sem_Unit);
begin
case Chars (Get_Pragma_Arg (Arg1)) is
when Name_GPL =>
Set_License (Sind, GPL);
when Name_Modified_GPL =>
Set_License (Sind, Modified_GPL);
when Name_Restricted =>
Set_License (Sind, Restricted);
when Name_Unrestricted =>
Set_License (Sind, Unrestricted);
when others =>
Error_Pragma_Arg ("invalid license name", Arg1);
end case;
end;
---------------
-- Link_With --
---------------
-- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
when Pragma_Link_With => Link_With : declare
Arg : Node_Id;
begin
GNAT_Pragma;
if Operating_Mode = Generate_Code
and then In_Extended_Main_Source_Unit (N)
then
Check_At_Least_N_Arguments (1);
Check_No_Identifiers;
Check_Is_In_Decl_Part_Or_Package_Spec;
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
Start_String;
Arg := Arg1;
while Present (Arg) loop
Check_Arg_Is_Static_Expression (Arg, Standard_String);
-- Store argument, converting sequences of spaces
-- to a single null character (this is one of the
-- differences in processing between Link_With
-- and Linker_Options).
declare
C : constant Char_Code := Get_Char_Code (' ');
S : constant String_Id :=
Strval (Expr_Value_S (Expression (Arg)));
L : constant Nat := String_Length (S);
F : Nat := 1;
procedure Skip_Spaces;
-- Advance F past any spaces
procedure Skip_Spaces is
begin
while F <= L and then Get_String_Char (S, F) = C loop
F := F + 1;
end loop;
end Skip_Spaces;
begin
Skip_Spaces; -- skip leading spaces
-- Loop through characters, changing any embedded
-- sequence of spaces to a single null character
-- (this is how Link_With/Linker_Options differ)
while F <= L loop
if Get_String_Char (S, F) = C then
Skip_Spaces;
exit when F > L;
Store_String_Char (ASCII.NUL);
else
Store_String_Char (Get_String_Char (S, F));
F := F + 1;
end if;
end loop;
end;
Arg := Next (Arg);
if Present (Arg) then
Store_String_Char (ASCII.NUL);
end if;
end loop;
Store_Linker_Option_String (End_String);
end if;
end Link_With;
------------------
-- Linker_Alias --
------------------
-- pragma Linker_Alias (
-- [Entity =>] LOCAL_NAME
-- [Target =>] static_string_EXPRESSION);
when Pragma_Linker_Alias =>
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Target));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Target);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
------------------------
-- Linker_Constructor --
------------------------
-- pragma Linker_Constructor (procedure_LOCAL_NAME);
-- Code is shared with Linker_Destructor
-----------------------
-- Linker_Destructor --
-----------------------
-- pragma Linker_Destructor (procedure_LOCAL_NAME);
when Pragma_Linker_Constructor |
Pragma_Linker_Destructor =>
Linker_Constructor : declare
Arg1_X : Node_Id;
Proc : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Local_Name (Arg1);
Arg1_X := Expression (Arg1);
Analyze (Arg1_X);
Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
if not Is_Library_Level_Entity (Proc) then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg1);
end if;
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Proc, N) then
return;
else
Set_Has_Gigi_Rep_Item (Proc);
end if;
end Linker_Constructor;
--------------------
-- Linker_Options --
--------------------
-- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
when Pragma_Linker_Options => Linker_Options : declare
Arg : Node_Id;
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Is_In_Decl_Part_Or_Package_Spec;
if Operating_Mode = Generate_Code
and then In_Extended_Main_Source_Unit (N)
then
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
Start_String (Strval (Expr_Value_S (Expression (Arg1))));
Arg := Arg2;
while Present (Arg) loop
Check_Arg_Is_Static_Expression (Arg, Standard_String);
Store_String_Char (ASCII.NUL);
Store_String_Chars
(Strval (Expr_Value_S (Expression (Arg))));
Arg := Next (Arg);
end loop;
Store_Linker_Option_String (End_String);
end if;
end Linker_Options;
--------------------
-- Linker_Section --
--------------------
-- pragma Linker_Section (
-- [Entity =>] LOCAL_NAME
-- [Section =>] static_string_EXPRESSION);
when Pragma_Linker_Section =>
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Section));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Section);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
----------
-- List --
----------
-- pragma List (On | Off)
-- There is nothing to do here, since we did all the processing
-- for this pragma in Par.Prag (so that it works properly even in
-- syntax only mode)
when Pragma_List =>
null;
--------------------
-- Locking_Policy --
--------------------
-- pragma Locking_Policy (policy_IDENTIFIER);
when Pragma_Locking_Policy => declare
LP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Locking_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
LP := Fold_Upper (Name_Buffer (1));
if Locking_Policy /= ' '
and then Locking_Policy /= LP
then
Error_Msg_Sloc := Locking_Policy_Sloc;
Error_Pragma ("locking policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Locking_Policy := LP;
if Locking_Policy_Sloc /= System_Location then
Locking_Policy_Sloc := Loc;
end if;
end if;
end;
----------------
-- Long_Float --
----------------
-- pragma Long_Float (D_Float | G_Float);
when Pragma_Long_Float =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_No_Identifier (Arg1);
Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
if not OpenVMS_On_Target then
Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
end if;
-- D_Float case
if Chars (Expression (Arg1)) = Name_D_Float then
if Opt.Float_Format_Long = 'G' then
Error_Pragma ("G_Float previously specified");
end if;
Opt.Float_Format_Long := 'D';
-- G_Float case (this is the default, does not need overriding)
else
if Opt.Float_Format_Long = 'D' then
Error_Pragma ("D_Float previously specified");
end if;
Opt.Float_Format_Long := 'G';
end if;
Set_Standard_Fpt_Formats;
-----------------------
-- Machine_Attribute --
-----------------------
-- pragma Machine_Attribute (
-- [Entity =>] LOCAL_NAME,
-- [Attribute_Name =>] static_string_EXPRESSION
-- [,[Info =>] static_string_EXPRESSION] );
when Pragma_Machine_Attribute => Machine_Attribute : declare
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
if Arg_Count = 3 then
Check_Optional_Identifier (Arg3, Name_Info);
Check_Arg_Is_Static_Expression (Arg3, Standard_String);
else
Check_Arg_Count (2);
end if;
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Attribute_Name);
Check_Arg_Is_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
Def_Id := Entity (Expression (Arg1));
if Is_Access_Type (Def_Id) then
Def_Id := Designated_Type (Def_Id);
end if;
if Rep_Item_Too_Early (Def_Id, N) then
return;
end if;
Def_Id := Underlying_Type (Def_Id);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Def_Id, N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
end Machine_Attribute;
----------
-- Main --
----------
-- pragma Main_Storage
-- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
-- MAIN_STORAGE_OPTION ::=
-- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
-- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
when Pragma_Main => Main : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Stack_Size,
Name_Task_Stack_Size_Default,
Name_Time_Slicing_Enabled);
Nod : Node_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
end if;
end loop;
if Present (Args (3)) then
Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
end if;
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Main
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end Main;
------------------
-- Main_Storage --
------------------
-- pragma Main_Storage
-- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
-- MAIN_STORAGE_OPTION ::=
-- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
-- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
when Pragma_Main_Storage => Main_Storage : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Working_Storage,
Name_Top_Guard);
Nod : Node_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
end if;
end loop;
Check_In_Main_Program;
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Main_Storage
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end Main_Storage;
-----------------
-- Memory_Size --
-----------------
-- pragma Memory_Size (NUMERIC_LITERAL)
when Pragma_Memory_Size =>
GNAT_Pragma;
-- Memory size is simply ignored
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Integer_Literal (Arg1);
---------------
-- No_Return --
---------------
-- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
when Pragma_No_Return => No_Return : declare
Id : Node_Id;
E : Entity_Id;
Found : Boolean;
Arg : Node_Id;
begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
-- Loop through arguments of pragma
Arg := Arg1;
while Present (Arg) loop
Check_Arg_Is_Local_Name (Arg);
Id := Expression (Arg);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg ("entity name required", Arg);
end if;
if Etype (Id) = Any_Type then
raise Pragma_Exit;
end if;
-- Loop to find matching procedures
E := Entity (Id);
Found := False;
while Present (E)
and then Scope (E) = Current_Scope
loop
if Ekind (E) = E_Procedure
or else Ekind (E) = E_Generic_Procedure
then
Set_No_Return (E);
Found := True;
end if;
E := Homonym (E);
end loop;
if not Found then
Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
end if;
Next (Arg);
end loop;
end No_Return;
------------------------
-- No_Strict_Aliasing --
------------------------
-- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
E_Id : Entity_Id;
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (1);
if Arg_Count = 0 then
Check_Valid_Configuration_Pragma;
Opt.No_Strict_Aliasing := True;
else
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Entity (Expression (Arg1));
if E_Id = Any_Type then
return;
elsif No (E_Id) or else not Is_Access_Type (E_Id) then
Error_Pragma_Arg ("pragma% requires access type", Arg1);
end if;
Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
end if;
end No_Strict_Alias;
-----------------
-- Obsolescent --
-----------------
-- pragma Obsolescent [(
-- [Entity => NAME,]
-- [(static_string_EXPRESSION [, Ada_05])];
when Pragma_Obsolescent => Obsolescent : declare
Ename : Node_Id;
Decl : Node_Id;
procedure Set_Obsolescent (E : Entity_Id);
-- Given an entity Ent, mark it as obsolescent if appropriate
---------------------
-- Set_Obsolescent --
---------------------
procedure Set_Obsolescent (E : Entity_Id) is
Active : Boolean;
Ent : Entity_Id;
S : String_Id;
begin
Active := True;
Ent := E;
-- Entity name was given
if Present (Ename) then
-- If entity name matches, we are fine
if Chars (Ename) = Chars (Ent) then
null;
-- If entity name does not match, only possibility is an
-- enumeration literal from an enumeration type declaration.
elsif Ekind (Ent) /= E_Enumeration_Type then
Error_Pragma
("pragma % entity name does not match declaration");
else
Ent := First_Literal (E);
loop
if No (Ent) then
Error_Pragma
("pragma % entity name does not match any " &
"enumeration literal");
elsif Chars (Ent) = Chars (Ename) then
exit;
else
Ent := Next_Literal (Ent);
end if;
end loop;
end if;
end if;
-- Ent points to entity to be marked
if Arg_Count >= 1 then
-- Deal with static string argument
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
S := Strval (Expression (Arg1));
for J in 1 .. String_Length (S) loop
if not In_Character_Range (Get_String_Char (S, J)) then
Error_Pragma_Arg
("pragma% argument does not allow wide characters",
Arg1);
end if;
end loop;
Set_Obsolescent_Warning (Ent, Expression (Arg1));
-- Check for Ada_05 parameter
if Arg_Count /= 1 then
Check_Arg_Count (2);
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= Name_Ada_05 then
Error_Msg_Name_2 := Name_Ada_05;
Error_Pragma_Arg
("only allowed argument for pragma% is %", Argx);
end if;
if Ada_Version_Explicit < Ada_05
or else not Warn_On_Ada_2005_Compatibility
then
Active := False;
end if;
end;
end if;
end if;
-- Set flag if pragma active
if Active then
Set_Is_Obsolescent (Ent);
end if;
return;
end Set_Obsolescent;
-- Start of processing for pragma Obsolescent
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (3);
-- See if first argument specifies an entity name
if Arg_Count >= 1
and then Chars (Arg1) = Name_Entity
then
Ename := Get_Pragma_Arg (Arg1);
if Nkind (Ename) /= N_Character_Literal
and then
Nkind (Ename) /= N_Identifier
and then
Nkind (Ename) /= N_Operator_Symbol
then
Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
end if;
-- Eliminate first argument, so we can share processing
Arg1 := Arg2;
Arg2 := Arg3;
Arg_Count := Arg_Count - 1;
-- No Entity name argument given
else
Ename := Empty;
end if;
Check_No_Identifiers;
-- Get immediately preceding declaration
Decl := Prev (N);
while Present (Decl) and then Nkind (Decl) = N_Pragma loop
Prev (Decl);
end loop;
-- Cases where we do not follow anything other than another pragma
if No (Decl) then
-- First case: library level compilation unit declaration with
-- the pragma immediately following the declaration.
if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
Set_Obsolescent
(Defining_Entity (Unit (Parent (Parent (N)))));
return;
-- Case 2: library unit placement for package
else
declare
Ent : constant Entity_Id := Find_Lib_Unit_Name;
begin
if Ekind (Ent) = E_Package
or else Ekind (Ent) = E_Generic_Package
then
Set_Obsolescent (Ent);
return;
end if;
end;
end if;
-- Cases where we must follow a declaration
else
if Nkind (Decl) not in N_Declaration
and then Nkind (Decl) not in N_Later_Decl_Item
and then Nkind (Decl) not in N_Generic_Declaration
then
Error_Pragma
("pragma% misplaced, " &
"must immediately follow a declaration");
else
Set_Obsolescent (Defining_Entity (Decl));
return;
end if;
end if;
end Obsolescent;
-----------------
-- No_Run_Time --
-----------------
-- pragma No_Run_Time
-- Note: this pragma is retained for backwards compatibiltiy.
-- See body of Rtsfind for full details on its handling.
when Pragma_No_Run_Time =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (0);
No_Run_Time_Mode := True;
Configurable_Run_Time_Mode := True;
declare
Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
begin
if Word32 then
Duration_32_Bits_On_Target := True;
end if;
end;
Set_Restriction (No_Finalization, N);
Set_Restriction (No_Exception_Handlers, N);
Set_Restriction (Max_Tasks, N, 0);
Set_Restriction (No_Tasking, N);
-----------------------
-- Normalize_Scalars --
-----------------------
-- pragma Normalize_Scalars;
when Pragma_Normalize_Scalars =>
Check_Ada_83_Warning;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Normalize_Scalars := True;
Init_Or_Norm_Scalars := True;
--------------
-- Optimize --
--------------
-- pragma Optimize (Time | Space);
-- The actual check for optimize is done in Gigi. Note that this
-- pragma does not actually change the optimization setting, it
-- simply checks that it is consistent with the pragma.
when Pragma_Optimize =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
-------------------------
-- Optional_Overriding --
-------------------------
-- These pragmas are treated as part of the previous subprogram
-- declaration, and analyzed immediately after it (see sem_ch6,
-- Check_Overriding_Operation). If the pragma has not been analyzed
-- yet, it appears in the wrong place.
when Pragma_Optional_Overriding =>
Error_Msg_N ("pragma must appear immediately after subprogram", N);
----------
-- Pack --
----------
-- pragma Pack (first_subtype_LOCAL_NAME);
when Pragma_Pack => Pack : declare
Assoc : constant Node_Id := Arg1;
Type_Id : Node_Id;
Typ : Entity_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Type_Id := Expression (Assoc);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
Error_Pragma ("pragma% must specify array or record type");
end if;
Check_First_Subtype (Arg1);
if Has_Pragma_Pack (Typ) then
Error_Pragma ("duplicate pragma%, only one allowed");
-- Array type
elsif Is_Array_Type (Typ) then
-- Pack not allowed for aliased or atomic components
if Has_Aliased_Components (Base_Type (Typ)) then
Error_Pragma
("pragma% ignored, cannot pack aliased components?");
elsif Has_Atomic_Components (Typ)
or else Is_Atomic (Component_Type (Typ))
then
Error_Pragma
("?pragma% ignored, cannot pack atomic components");
end if;
-- If we had an explicit component size given, then we do not
-- let Pack override this given size. We also give a warning
-- that Pack is being ignored unless we can tell for sure that
-- the Pack would not have had any effect anyway.
if Has_Component_Size_Clause (Typ) then
if Known_Static_RM_Size (Component_Type (Typ))
and then
RM_Size (Component_Type (Typ)) = Component_Size (Typ)
then
null;
else
Error_Pragma
("?pragma% ignored, explicit component size given");
end if;
-- If no prior array component size given, Pack is effective
else
if not Rep_Item_Too_Late (Typ, N) then
Set_Is_Packed (Base_Type (Typ));
Set_Has_Pragma_Pack (Base_Type (Typ));
Set_Has_Non_Standard_Rep (Base_Type (Typ));
end if;
end if;
-- For record types, the pack is always effective
else pragma Assert (Is_Record_Type (Typ));
if not Rep_Item_Too_Late (Typ, N) then
Set_Has_Pragma_Pack (Base_Type (Typ));
Set_Is_Packed (Base_Type (Typ));
Set_Has_Non_Standard_Rep (Base_Type (Typ));
end if;
end if;
end Pack;
----------
-- Page --
----------
-- pragma Page;
-- There is nothing to do here, since we did all the processing
-- for this pragma in Par.Prag (so that it works properly even in
-- syntax only mode)
when Pragma_Page =>
null;
-------------
-- Passive --
-------------
-- pragma Passive [(PASSIVE_FORM)];
-- PASSIVE_FORM ::= Semaphore | No
when Pragma_Passive =>
GNAT_Pragma;
if Nkind (Parent (N)) /= N_Task_Definition then
Error_Pragma ("pragma% must be within task definition");
end if;
if Arg_Count /= 0 then
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
end if;
----------------------------------
-- Preelaborable_Initialization --
----------------------------------
-- pragma Preelaborable_Initialization (DIRECT_NAME);
when Pragma_Preelaborable_Initialization => Preelab_Init : declare
Ent : Entity_Id;
begin
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Identifier (Arg1);
Check_Arg_Is_Local_Name (Arg1);
Check_First_Subtype (Arg1);
Ent := Entity (Expression (Arg1));
if not Is_Private_Type (Ent) then
Error_Pragma_Arg
("pragma % can only be applied to private type", Arg1);
end if;
Set_Known_To_Have_Preelab_Init (Ent);
end Preelab_Init;
-------------
-- Polling --
-------------
-- pragma Polling (ON | OFF);
when Pragma_Polling =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
Polling_Required := (Chars (Expression (Arg1)) = Name_On);
--------------------
-- Persistent_BSS --
--------------------
when Pragma_Persistent_BSS => Persistent_BSS : declare
Decl : Node_Id;
Ent : Entity_Id;
Prag : Node_Id;
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (1);
-- Case of application to specific object (one argument)
if Arg_Count = 1 then
Check_Arg_Is_Library_Level_Local_Name (Arg1);
if not Is_Entity_Name (Expression (Arg1))
or else
(Ekind (Entity (Expression (Arg1))) /= E_Variable
and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
then
Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
end if;
Ent := Entity (Expression (Arg1));
Decl := Parent (Ent);
if Rep_Item_Too_Late (Ent, N) then
return;
end if;
if Present (Expression (Decl)) then
Error_Pragma_Arg
("object for pragma% cannot have initialization", Arg1);
end if;
if not Is_Potentially_Persistent_Type (Etype (Ent)) then
Error_Pragma_Arg
("object type for pragma% is not potentially persistent",
Arg1);
end if;
Prag :=
Make_Linker_Section_Pragma
(Ent, Sloc (N), ".persistent.bss");
Insert_After (N, Prag);
Analyze (Prag);
-- Case of use as configuration pragma with no arguments
else
Check_Valid_Configuration_Pragma;
Persistent_BSS_Mode := True;
end if;
end Persistent_BSS;
------------------
-- Preelaborate --
------------------
-- pragma Preelaborate [(library_unit_NAME)];
-- Set the flag Is_Preelaborated of program unit name entity
when Pragma_Preelaborate => Preelaborate : declare
Pa : constant Node_Id := Parent (N);
Pk : constant Node_Kind := Nkind (Pa);
Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Ent := Find_Lib_Unit_Name;
-- This filters out pragmas inside generic parent then
-- show up inside instantiation
if Present (Ent)
and then not (Pk = N_Package_Specification
and then Present (Generic_Parent (Pa)))
then
if not Debug_Flag_U then
Set_Is_Preelaborated (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end if;
end Preelaborate;
---------------------
-- Preelaborate_05 --
---------------------
-- pragma Preelaborate_05 [(library_unit_NAME)];
-- This pragma is useable only in GNAT_Mode, where it is used like
-- pragma Preelaborate but it is only effective in Ada 2005 mode
-- (otherwise it is ignored). This is used to implement AI-362 which
-- recategorizes some run-time packages in Ada 2005 mode.
when Pragma_Preelaborate_05 => Preelaborate_05 : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Valid_Library_Unit_Pragma;
if not GNAT_Mode then
Error_Pragma ("pragma% only available in GNAT mode");
end if;
if Nkind (N) = N_Null_Statement then
return;
end if;
-- This is one of the few cases where we need to test the value of
-- Ada_Version_Explicit rather than Ada_Version (which is always
-- set to Ada_05 in a predefined unit), we need to know the
-- explicit version set to know if this pragma is active.
if Ada_Version_Explicit >= Ada_05 then
Ent := Find_Lib_Unit_Name;
Set_Is_Preelaborated (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end Preelaborate_05;
--------------
-- Priority --
--------------
-- pragma Priority (EXPRESSION);
when Pragma_Priority => Priority : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
-- Subprogram case
if Nkind (P) = N_Subprogram_Body then
Check_In_Main_Program;
Arg := Expression (Arg1);
Analyze_And_Resolve (Arg, Standard_Integer);
-- Must be static
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("main subprogram priority is not static!", Arg);
raise Pragma_Exit;
-- If constraint error, then we already signalled an error
elsif Raises_Constraint_Error (Arg) then
null;
-- Otherwise check in range
else
declare
Val : constant Uint := Expr_Value (Arg);
begin
if Val < 0
or else Val > Expr_Value (Expression
(Parent (RTE (RE_Max_Priority))))
then
Error_Pragma_Arg
("main subprogram priority is out of range", Arg1);
end if;
end;
end if;
Set_Main_Priority
(Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
-- Task or Protected, must be of type Integer
elsif Nkind (P) = N_Protected_Definition
or else
Nkind (P) = N_Task_Definition
then
Arg := Expression (Arg1);
-- The expression must be analyzed in the special manner
-- described in "Handling of Default and Per-Object
-- Expressions" in sem.ads.
Analyze_Per_Use_Expression (Arg, Standard_Integer);
if not Is_Static_Expression (Arg) then
Check_Restriction (Static_Priorities, Arg);
end if;
-- Anything else is incorrect
else
Pragma_Misplaced;
end if;
if Has_Priority_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Priority_Pragma (P, True);
if Nkind (P) = N_Protected_Definition
or else
Nkind (P) = N_Task_Definition
then
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
-- exp_ch9 should use this ???
end if;
end if;
end Priority;
-----------------------------------
-- Priority_Specific_Dispatching --
-----------------------------------
-- pragma Priority_Specific_Dispatching (
-- policy_IDENTIFIER,
-- first_priority_EXPRESSION,
-- last_priority_EXPRESSION);
when Pragma_Priority_Specific_Dispatching =>
Priority_Specific_Dispatching : declare
Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
-- This is the entity System.Any_Priority;
DP : Character;
Lower_Bound : Node_Id;
Upper_Bound : Node_Id;
Lower_Val : Uint;
Upper_Val : Uint;
begin
Check_Arg_Count (3);
Check_No_Identifiers;
Check_Arg_Is_Task_Dispatching_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
DP := Fold_Upper (Name_Buffer (1));
Lower_Bound := Expression (Arg2);
Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
Lower_Val := Expr_Value (Lower_Bound);
Upper_Bound := Expression (Arg3);
Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
Upper_Val := Expr_Value (Upper_Bound);
-- It is not allowed to use Task_Dispatching_Policy and
-- Priority_Specific_Dispatching in the same partition.
if Task_Dispatching_Policy /= ' ' then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma
("pragma% incompatible with Task_Dispatching_Policy#");
-- Check lower bound in range
elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
or else
Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
then
Error_Pragma_Arg
("first_priority is out of range", Arg2);
-- Check upper bound in range
elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
or else
Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
then
Error_Pragma_Arg
("last_priority is out of range", Arg3);
-- Check that the priority range is valid
elsif Lower_Val > Upper_Val then
Error_Pragma
("last_priority_expression must be greater than" &
" or equal to first_priority_expression");
-- Store the new policy, but always preserve System_Location since
-- we like the error message with the run-time name.
else
-- Check overlapping in the priority ranges specified in other
-- Priority_Specific_Dispatching pragmas within the same
-- partition. We can only check those we know about!
for J in
Specific_Dispatching.First .. Specific_Dispatching.Last
loop
if Specific_Dispatching.Table (J).First_Priority in
UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
or else Specific_Dispatching.Table (J).Last_Priority in
UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
then
Error_Msg_Sloc :=
Specific_Dispatching.Table (J).Pragma_Loc;
Error_Pragma ("priority range overlaps with" &
" Priority_Specific_Dispatching#");
end if;
end loop;
-- The use of Priority_Specific_Dispatching is incompatible
-- with Task_Dispatching_Policy.
if Task_Dispatching_Policy /= ' ' then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma ("Priority_Specific_Dispatching incompatible" &
" with Task_Dispatching_Policy#");
end if;
-- The use of Priority_Specific_Dispatching forces ceiling
-- locking policy.
if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
Error_Msg_Sloc := Locking_Policy_Sloc;
Error_Pragma ("Priority_Specific_Dispatching incompatible" &
" with Locking_Policy#");
-- Set the Ceiling_Locking policy, but preserve System_Location
-- since we like the error message with the run time name.
else
Locking_Policy := 'C';
if Locking_Policy_Sloc /= System_Location then
Locking_Policy_Sloc := Loc;
end if;
end if;
-- Add entry in the table
Specific_Dispatching.Append
((Dispatching_Policy => DP,
First_Priority => UI_To_Int (Lower_Val),
Last_Priority => UI_To_Int (Upper_Val),
Pragma_Loc => Loc));
end if;
end Priority_Specific_Dispatching;
-------------
-- Profile --
-------------
-- pragma Profile (profile_IDENTIFIER);
-- profile_IDENTIFIER => Protected | Ravenscar
when Pragma_Profile =>
Check_Arg_Count (1);
Check_Valid_Configuration_Pragma;
Check_No_Identifiers;
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
if Chars (Argx) = Name_Ravenscar then
Set_Ravenscar_Profile (N);
elsif Chars (Argx) = Name_Restricted then
Set_Profile_Restrictions (Restricted, N, Warn => False);
else
Error_Pragma_Arg ("& is not a valid profile", Argx);
end if;
end;
----------------------
-- Profile_Warnings --
----------------------
-- pragma Profile_Warnings (profile_IDENTIFIER);
-- profile_IDENTIFIER => Protected | Ravenscar
when Pragma_Profile_Warnings =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Valid_Configuration_Pragma;
Check_No_Identifiers;
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
if Chars (Argx) = Name_Ravenscar then
Set_Profile_Restrictions (Ravenscar, N, Warn => True);
elsif Chars (Argx) = Name_Restricted then
Set_Profile_Restrictions (Restricted, N, Warn => True);
else
Error_Pragma_Arg ("& is not a valid profile", Argx);
end if;
end;
--------------------------
-- Propagate_Exceptions --
--------------------------
-- pragma Propagate_Exceptions;
-- Note: this pragma is obsolete and has no effect
when Pragma_Propagate_Exceptions =>
GNAT_Pragma;
Check_Arg_Count (0);
if In_Extended_Main_Source_Unit (N) then
Propagate_Exceptions := True;
end if;
------------------
-- Psect_Object --
------------------
-- pragma Psect_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
when Pragma_Psect_Object | Pragma_Common_Object =>
Psect_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
Def_Id : Entity_Id;
procedure Check_Too_Long (Arg : Node_Id);
-- Posts message if the argument is an identifier with more
-- than 31 characters, or a string literal with more than
-- 31 characters, and we are operating under VMS
--------------------
-- Check_Too_Long --
--------------------
procedure Check_Too_Long (Arg : Node_Id) is
X : constant Node_Id := Original_Node (Arg);
begin
if Nkind (X) /= N_String_Literal
and then
Nkind (X) /= N_Identifier
then
Error_Pragma_Arg
("inappropriate argument for pragma %", Arg);
end if;
if OpenVMS_On_Target then
if (Nkind (X) = N_String_Literal
and then String_Length (Strval (X)) > 31)
or else
(Nkind (X) = N_Identifier
and then Length_Of_Name (Chars (X)) > 31)
then
Error_Pragma_Arg
("argument for pragma % is longer than 31 characters",
Arg);
end if;
end if;
end Check_Too_Long;
-- Start of processing for Common_Object/Psect_Object
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Internal_Arg (Internal);
Def_Id := Entity (Internal);
if Ekind (Def_Id) /= E_Constant
and then Ekind (Def_Id) /= E_Variable
then
Error_Pragma_Arg
("pragma% must designate an object", Internal);
end if;
Check_Too_Long (Internal);
if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
Error_Pragma_Arg
("cannot use pragma% for imported/exported object",
Internal);
end if;
if Is_Concurrent_Type (Etype (Internal)) then
Error_Pragma_Arg
("cannot specify pragma % for task/protected object",
Internal);
end if;
if Has_Rep_Pragma (Def_Id, Name_Common_Object)
or else
Has_Rep_Pragma (Def_Id, Name_Psect_Object)
then
Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
end if;
if Ekind (Def_Id) = E_Constant then
Error_Pragma_Arg
("cannot specify pragma % for a constant", Internal);
end if;
if Is_Record_Type (Etype (Internal)) then
declare
Ent : Entity_Id;
Decl : Entity_Id;
begin
Ent := First_Entity (Etype (Internal));
while Present (Ent) loop
Decl := Declaration_Node (Ent);
if Ekind (Ent) = E_Component
and then Nkind (Decl) = N_Component_Declaration
and then Present (Expression (Decl))
and then Warn_On_Export_Import
then
Error_Msg_N
("?object for pragma % has defaults", Internal);
exit;
else
Next_Entity (Ent);
end if;
end loop;
end;
end if;
if Present (Size) then
Check_Too_Long (Size);
end if;
if Present (External) then
Check_Arg_Is_External_Name (External);
Check_Too_Long (External);
end if;
-- If all error tests pass, link pragma on to the rep item chain
Record_Rep_Item (Def_Id, N);
end Psect_Object;
----------
-- Pure --
----------
-- pragma Pure [(library_unit_NAME)];
when Pragma_Pure => Pure : declare
Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Ent := Find_Lib_Unit_Name;
Set_Is_Pure (Ent);
Set_Has_Pragma_Pure (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end Pure;
-------------
-- Pure_05 --
-------------
-- pragma Pure_05 [(library_unit_NAME)];
-- This pragma is useable only in GNAT_Mode, where it is used like
-- pragma Pure but it is only effective in Ada 2005 mode (otherwise
-- it is ignored). It may be used after a pragma Preelaborate, in
-- which case it overrides the effect of the pragma Preelaborate.
-- This is used to implement AI-362 which recategorizes some run-time
-- packages in Ada 2005 mode.
when Pragma_Pure_05 => Pure_05 : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Valid_Library_Unit_Pragma;
if not GNAT_Mode then
Error_Pragma ("pragma% only available in GNAT mode");
end if;
if Nkind (N) = N_Null_Statement then
return;
end if;
-- This is one of the few cases where we need to test the value of
-- Ada_Version_Explicit rather than Ada_Version (which is always
-- set to Ada_05 in a predefined unit), we need to know the
-- explicit version set to know if this pragma is active.
if Ada_Version_Explicit >= Ada_05 then
Ent := Find_Lib_Unit_Name;
Set_Is_Preelaborated (Ent, False);
Set_Is_Pure (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end Pure_05;
-------------------
-- Pure_Function --
-------------------
-- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
when Pragma_Pure_Function => Pure_Function : declare
E_Id : Node_Id;
E : Entity_Id;
Def_Id : Entity_Id;
Effective : Boolean := False;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Error_Posted (E_Id) then
return;
end if;
-- Loop through homonyms (overloadings) of referenced entity
E := Entity (E_Id);
if Present (E) then
loop
Def_Id := Get_Base_Subprogram (E);
if Ekind (Def_Id) /= E_Function
and then Ekind (Def_Id) /= E_Generic_Function
and then Ekind (Def_Id) /= E_Operator
then
Error_Pragma_Arg
("pragma% requires a function name", Arg1);
end if;
Set_Is_Pure (Def_Id);
if not Has_Pragma_Pure_Function (Def_Id) then
Set_Has_Pragma_Pure_Function (Def_Id);
Effective := True;
end if;
E := Homonym (E);
exit when No (E) or else Scope (E) /= Current_Scope;
end loop;
if not Effective
and then Warn_On_Redundant_Constructs
then
Error_Msg_NE ("pragma Pure_Function on& is redundant?",
N, Entity (E_Id));
end if;
end if;
end Pure_Function;
--------------------
-- Queuing_Policy --
--------------------
-- pragma Queuing_Policy (policy_IDENTIFIER);
when Pragma_Queuing_Policy => declare
QP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Queuing_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
QP := Fold_Upper (Name_Buffer (1));
if Queuing_Policy /= ' '
and then Queuing_Policy /= QP
then
Error_Msg_Sloc := Queuing_Policy_Sloc;
Error_Pragma ("queuing policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Queuing_Policy := QP;
if Queuing_Policy_Sloc /= System_Location then
Queuing_Policy_Sloc := Loc;
end if;
end if;
end;
---------------------------
-- Remote_Call_Interface --
---------------------------
-- pragma Remote_Call_Interface [(library_unit_NAME)];
when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
K : Node_Kind;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
K := Nkind (Unit (Cunit_Node));
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if K = N_Package_Declaration
or else K = N_Generic_Package_Declaration
or else K = N_Subprogram_Declaration
or else K = N_Generic_Subprogram_Declaration
or else (K = N_Subprogram_Body
and then Acts_As_Spec (Unit (Cunit_Node)))
then
null;
else
Error_Pragma (
"pragma% must apply to package or subprogram declaration");
end if;
Set_Is_Remote_Call_Interface (Cunit_Ent);
end Remote_Call_Interface;
------------------
-- Remote_Types --
------------------
-- pragma Remote_Types [(library_unit_NAME)];
when Pragma_Remote_Types => Remote_Types : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
and then
Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
then
Error_Pragma (
"pragma% can only apply to a package declaration");
end if;
Set_Is_Remote_Types (Cunit_Ent);
end Remote_Types;
---------------
-- Ravenscar --
---------------
-- pragma Ravenscar;
when Pragma_Ravenscar =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Set_Ravenscar_Profile (N);
if Warn_On_Obsolescent_Feature then
Error_Msg_N
("pragma Ravenscar is an obsolescent feature?", N);
Error_Msg_N
("|use pragma Profile (Ravenscar) instead", N);
end if;
-------------------------
-- Restricted_Run_Time --
-------------------------
-- pragma Restricted_Run_Time;
when Pragma_Restricted_Run_Time =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Set_Profile_Restrictions (Restricted, N, Warn => False);
if Warn_On_Obsolescent_Feature then
Error_Msg_N
("pragma Restricted_Run_Time is an obsolescent feature?", N);
Error_Msg_N
("|use pragma Profile (Restricted) instead", N);
end if;
------------------
-- Restrictions --
------------------
-- pragma Restrictions (RESTRICTION {, RESTRICTION});
-- RESTRICTION ::=
-- restriction_IDENTIFIER
-- | restriction_parameter_IDENTIFIER => EXPRESSION
when Pragma_Restrictions =>
Process_Restrictions_Or_Restriction_Warnings (Warn => False);
--------------------------
-- Restriction_Warnings --
--------------------------
-- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
-- RESTRICTION ::=
-- restriction_IDENTIFIER
-- | restriction_parameter_IDENTIFIER => EXPRESSION
when Pragma_Restriction_Warnings =>
Process_Restrictions_Or_Restriction_Warnings (Warn => True);
----------------
-- Reviewable --
----------------
-- pragma Reviewable;
when Pragma_Reviewable =>
Check_Ada_83_Warning;
Check_Arg_Count (0);
-------------------
-- Share_Generic --
-------------------
-- pragma Share_Generic (NAME {, NAME});
when Pragma_Share_Generic =>
GNAT_Pragma;
Process_Generic_List;
------------
-- Shared --
------------
-- pragma Shared (LOCAL_NAME);
when Pragma_Shared =>
GNAT_Pragma;
Process_Atomic_Shared_Volatile;
--------------------
-- Shared_Passive --
--------------------
-- pragma Shared_Passive [(library_unit_NAME)];
-- Set the flag Is_Shared_Passive of program unit name entity
when Pragma_Shared_Passive => Shared_Passive : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
and then
Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
then
Error_Pragma (
"pragma% can only apply to a package declaration");
end if;
Set_Is_Shared_Passive (Cunit_Ent);
end Shared_Passive;
----------------------
-- Source_File_Name --
----------------------
-- There are five forms for this pragma:
-- pragma Source_File_Name (
-- [UNIT_NAME =>] unit_NAME,
-- BODY_FILE_NAME => STRING_LITERAL
-- [, [INDEX =>] INTEGER_LITERAL]);
-- pragma Source_File_Name (
-- [UNIT_NAME =>] unit_NAME,
-- SPEC_FILE_NAME => STRING_LITERAL
-- [, [INDEX =>] INTEGER_LITERAL]);
-- pragma Source_File_Name (
-- BODY_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- pragma Source_File_Name (
-- SPEC_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- pragma Source_File_Name (
-- SUBUNIT_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
-- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
-- Source_File_Name (SFN), however their usage is exclusive:
-- SFN can only be used when no project file is used, while
-- SFNP can only be used when a project file is used.
-- No processing here. Processing was completed during parsing,
-- since we need to have file names set as early as possible.
-- Units are loaded well before semantic processing starts.
-- The only processing we defer to this point is the check
-- for correct placement.
when Pragma_Source_File_Name =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
------------------------------
-- Source_File_Name_Project --
------------------------------
-- See Source_File_Name for syntax
-- No processing here. Processing was completed during parsing,
-- since we need to have file names set as early as possible.
-- Units are loaded well before semantic processing starts.
-- The only processing we defer to this point is the check
-- for correct placement.
when Pragma_Source_File_Name_Project =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
-- Check that a pragma Source_File_Name_Project is used only
-- in a configuration pragmas file.
-- Pragmas Source_File_Name_Project should only be generated
-- by the Project Manager in configuration pragmas files.
-- This is really an ugly test. It seems to depend on some
-- accidental and undocumented property. At the very least
-- it needs to be documented, but it would be better to have
-- a clean way of testing if we are in a configuration file???
if Present (Parent (N)) then
Error_Pragma
("pragma% can only appear in a configuration pragmas file");
end if;
----------------------
-- Source_Reference --
----------------------
-- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
-- Nothing to do, all processing completed in Par.Prag, since we
-- need the information for possible parser messages that are output
when Pragma_Source_Reference =>
GNAT_Pragma;
------------------
-- Storage_Size --
------------------
-- pragma Storage_Size (EXPRESSION);
when Pragma_Storage_Size => Storage_Size : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
-- The expression must be analyzed in the special manner
-- described in "Handling of Default Expressions" in sem.ads.
-- Set In_Default_Expression for per-object case ???
Arg := Expression (Arg1);
Analyze_Per_Use_Expression (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Check_Restriction (Static_Storage_Size, Arg);
end if;
if Nkind (P) /= N_Task_Definition then
Pragma_Misplaced;
return;
else
if Has_Storage_Size_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Storage_Size_Pragma (P, True);
end if;
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
-- ??? exp_ch9 should use this!
end if;
end Storage_Size;
------------------
-- Storage_Unit --
------------------
-- pragma Storage_Unit (NUMERIC_LITERAL);
-- Only permitted argument is System'Storage_Unit value
when Pragma_Storage_Unit =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Integer_Literal (Arg1);
if Intval (Expression (Arg1)) /=
UI_From_Int (Ttypes.System_Storage_Unit)
then
Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
Error_Pragma_Arg
("the only allowed argument for pragma% is ^", Arg1);
end if;
--------------------
-- Stream_Convert --
--------------------
-- pragma Stream_Convert (
-- [Entity =>] type_LOCAL_NAME,
-- [Read =>] function_NAME,
-- [Write =>] function NAME);
when Pragma_Stream_Convert => Stream_Convert : declare
procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
-- Check that the given argument is the name of a local
-- function of one argument that is not overloaded earlier
-- in the current local scope. A check is also made that the
-- argument is a function with one parameter.
--------------------------------------
-- Check_OK_Stream_Convert_Function --
--------------------------------------
procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
Ent : Entity_Id;
begin
Check_Arg_Is_Local_Name (Arg);
Ent := Entity (Expression (Arg));
if Has_Homonym (Ent) then
Error_Pragma_Arg
("argument for pragma% may not be overloaded", Arg);
end if;
if Ekind (Ent) /= E_Function
or else No (First_Formal (Ent))
or else Present (Next_Formal (First_Formal (Ent)))
then
Error_Pragma_Arg
("argument for pragma% must be" &
" function of one argument", Arg);
end if;
end Check_OK_Stream_Convert_Function;
-- Start of procecessing for Stream_Convert
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
Check_Arg_Count (3);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Read);
Check_Optional_Identifier (Arg3, Name_Write);
Check_Arg_Is_Local_Name (Arg1);
Check_OK_Stream_Convert_Function (Arg2);
Check_OK_Stream_Convert_Function (Arg3);
declare
Typ : constant Entity_Id :=
Underlying_Type (Entity (Expression (Arg1)));
Read : constant Entity_Id := Entity (Expression (Arg2));
Write : constant Entity_Id := Entity (Expression (Arg3));
begin
if Etype (Typ) = Any_Type
or else
Etype (Read) = Any_Type
or else
Etype (Write) = Any_Type
then
return;
end if;
Check_First_Subtype (Arg1);
if Rep_Item_Too_Early (Typ, N)
or else
Rep_Item_Too_Late (Typ, N)
then
return;
end if;
if Underlying_Type (Etype (Read)) /= Typ then
Error_Pragma_Arg
("incorrect return type for function&", Arg2);
end if;
if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
Error_Pragma_Arg
("incorrect parameter type for function&", Arg3);
end if;
if Underlying_Type (Etype (First_Formal (Read))) /=
Underlying_Type (Etype (Write))
then
Error_Pragma_Arg
("result type of & does not match Read parameter type",
Arg3);
end if;
end;
end Stream_Convert;
-------------------------
-- Style_Checks (GNAT) --
-------------------------
-- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
-- This is processed by the parser since some of the style
-- checks take place during source scanning and parsing. This
-- means that we don't need to issue error messages here.
when Pragma_Style_Checks => Style_Checks : declare
A : constant Node_Id := Expression (Arg1);
S : String_Id;
C : Char_Code;
begin
GNAT_Pragma;
Check_No_Identifiers;
-- Two argument form
if Arg_Count = 2 then
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
declare
E_Id : Node_Id;
E : Entity_Id;
begin
E_Id := Expression (Arg2);
Analyze (E_Id);
if not Is_Entity_Name (E_Id) then
Error_Pragma_Arg
("second argument of pragma% must be entity name",
Arg2);
end if;
E := Entity (E_Id);
if E = Any_Id then
return;
else
loop
Set_Suppress_Style_Checks (E,
(Chars (Expression (Arg1)) = Name_Off));
exit when No (Homonym (E));
E := Homonym (E);
end loop;
end if;
end;
-- One argument form
else
Check_Arg_Count (1);
if Nkind (A) = N_String_Literal then
S := Strval (A);
declare
Slen : constant Natural := Natural (String_Length (S));
Options : String (1 .. Slen);
J : Natural;
begin
J := 1;
loop
C := Get_String_Char (S, Int (J));
exit when not In_Character_Range (C);
Options (J) := Get_Character (C);
-- If at end of string, set options. As per discussion
-- above, no need to check for errors, since we issued
-- them in the parser.
if J = Slen then
Set_Style_Check_Options (Options);
exit;
end if;
J := J + 1;
end loop;
end;
elsif Nkind (A) = N_Identifier then
if Chars (A) = Name_All_Checks then
Set_Default_Style_Check_Options;
elsif Chars (A) = Name_On then
Style_Check := True;
elsif Chars (A) = Name_Off then
Style_Check := False;
end if;
end if;
end if;
end Style_Checks;
--------------
-- Subtitle --
--------------
-- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
when Pragma_Subtitle =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Subtitle);
Check_Arg_Is_String_Literal (Arg1);
--------------
-- Suppress --
--------------
-- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
when Pragma_Suppress =>
Process_Suppress_Unsuppress (True);
------------------
-- Suppress_All --
------------------
-- pragma Suppress_All;
-- The only check made here is that the pragma appears in the
-- proper place, i.e. following a compilation unit. If indeed
-- it appears in this context, then the parser has already
-- inserted an equivalent pragma Suppress (All_Checks) to get
-- the required effect.
when Pragma_Suppress_All =>
GNAT_Pragma;
Check_Arg_Count (0);
if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
or else not Is_List_Member (N)
or else List_Containing (N) /= Pragmas_After (Parent (N))
then
Error_Pragma
("misplaced pragma%, must follow compilation unit");
end if;
-------------------------
-- Suppress_Debug_Info --
-------------------------
-- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
when Pragma_Suppress_Debug_Info =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
----------------------------------
-- Suppress_Exception_Locations --
----------------------------------
-- pragma Suppress_Exception_Locations;
when Pragma_Suppress_Exception_Locations =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Exception_Locations_Suppressed := True;
-----------------------------
-- Suppress_Initialization --
-----------------------------
-- pragma Suppress_Initialization ([Entity =>] type_Name);
when Pragma_Suppress_Initialization => Suppress_Init : declare
E_Id : Node_Id;
E : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if Is_Type (E) then
if Is_Incomplete_Or_Private_Type (E) then
if No (Full_View (Base_Type (E))) then
Error_Pragma_Arg
("argument of pragma% cannot be an incomplete type",
Arg1);
else
Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
end if;
else
Set_Suppress_Init_Proc (Base_Type (E));
end if;
else
Error_Pragma_Arg
("pragma% requires argument that is a type name", Arg1);
end if;
end Suppress_Init;
-----------------
-- System_Name --
-----------------
-- pragma System_Name (DIRECT_NAME);
-- Syntax check: one argument, which must be the identifier GNAT
-- or the identifier GCC, no other identifiers are acceptable.
when Pragma_System_Name =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
-----------------------------
-- Task_Dispatching_Policy --
-----------------------------
-- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
when Pragma_Task_Dispatching_Policy => declare
DP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Task_Dispatching_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
DP := Fold_Upper (Name_Buffer (1));
if Task_Dispatching_Policy /= ' '
and then Task_Dispatching_Policy /= DP
then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma
("task dispatching policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Task_Dispatching_Policy := DP;
if Task_Dispatching_Policy_Sloc /= System_Location then
Task_Dispatching_Policy_Sloc := Loc;
end if;
end if;
end;
--------------
-- Task_Info --
--------------
-- pragma Task_Info (EXPRESSION);
when Pragma_Task_Info => Task_Info : declare
P : constant Node_Id := Parent (N);
begin
GNAT_Pragma;
if Nkind (P) /= N_Task_Definition then
Error_Pragma ("pragma% must appear in task definition");
end if;
Check_No_Identifiers;
Check_Arg_Count (1);
Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
if Etype (Expression (Arg1)) = Any_Type then
return;
end if;
if Has_Task_Info_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Task_Info_Pragma (P, True);
end if;
end Task_Info;
---------------
-- Task_Name --
---------------
-- pragma Task_Name (string_EXPRESSION);
when Pragma_Task_Name => Task_Name : declare
-- pragma Priority (EXPRESSION);
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Arg := Expression (Arg1);
Analyze_And_Resolve (Arg, Standard_String);
if Nkind (P) /= N_Task_Definition then
Pragma_Misplaced;
end if;
if Has_Task_Name_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Task_Name_Pragma (P, True);
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
end if;
end Task_Name;
------------------
-- Task_Storage --
------------------
-- pragma Task_Storage (
-- [Task_Type =>] LOCAL_NAME,
-- [Top_Guard =>] static_integer_EXPRESSION);
when Pragma_Task_Storage => Task_Storage : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Task_Type,
Name_Top_Guard);
Task_Type : Node_Id renames Args (1);
Top_Guard : Node_Id renames Args (2);
Ent : Entity_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
if No (Task_Type) then
Error_Pragma
("missing task_type argument for pragma%");
end if;
Check_Arg_Is_Local_Name (Task_Type);
Ent := Entity (Task_Type);
if not Is_Task_Type (Ent) then
Error_Pragma_Arg
("argument for pragma% must be task type", Task_Type);
end if;
if No (Top_Guard) then
Error_Pragma_Arg
("pragma% takes two arguments", Task_Type);
else
Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
end if;
Check_First_Subtype (Task_Type);
if Rep_Item_Too_Late (Ent, N) then
raise Pragma_Exit;
end if;
end Task_Storage;
-----------------
-- Thread_Body --
-----------------
-- pragma Thread_Body
-- ( [Entity =>] LOCAL_NAME
-- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
when Pragma_Thread_Body => Thread_Body : declare
Id : Node_Id;
SS : Node_Id;
E : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Secondary_Stack_Size));
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
if not Is_Entity_Name (Id)
or else not Is_Subprogram (Entity (Id))
then
Error_Pragma_Arg ("subprogram name required", Arg1);
end if;
E := Entity (Id);
-- Go to renamed subprogram if present, since Thread_Body applies
-- to the actual renamed entity, not to the renaming entity.
if Present (Alias (E))
and then Nkind (Parent (Declaration_Node (E))) =
N_Subprogram_Renaming_Declaration
then
E := Alias (E);
end if;
-- Various error checks
if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
Error_Pragma
("pragma% requires separate spec and must come before body");
elsif Rep_Item_Too_Early (E, N)
or else Rep_Item_Too_Late (E, N)
then
raise Pragma_Exit;
elsif Is_Thread_Body (E) then
Error_Pragma_Arg
("only one thread body pragma allowed", Arg1);
elsif Present (Homonym (E))
and then Scope (Homonym (E)) = Current_Scope
then
Error_Pragma_Arg
("thread body subprogram must not be overloaded", Arg1);
end if;
Set_Is_Thread_Body (E);
-- Deal with secondary stack argument
if Arg_Count = 2 then
Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
SS := Expression (Arg2);
Analyze_And_Resolve (SS, Any_Integer);
end if;
end Thread_Body;
----------------
-- Time_Slice --
----------------
-- pragma Time_Slice (static_duration_EXPRESSION);
when Pragma_Time_Slice => Time_Slice : declare
Val : Ureal;
Nod : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_In_Main_Program;
Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
if not Error_Posted (Arg1) then
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Time_Slice
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end if;
-- Process only if in main unit
if Get_Source_Unit (Loc) = Main_Unit then
Opt.Time_Slice_Set := True;
Val := Expr_Value_R (Expression (Arg1));
if Val <= Ureal_0 then
Opt.Time_Slice_Value := 0;
elsif Val > UR_From_Uint (UI_From_Int (1000)) then
Opt.Time_Slice_Value := 1_000_000_000;
else
Opt.Time_Slice_Value :=
UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
end if;
end if;
end Time_Slice;
-----------
-- Title --
-----------
-- pragma Title (TITLING_OPTION [, TITLING OPTION]);
-- TITLING_OPTION ::=
-- [Title =>] STRING_LITERAL
-- | [Subtitle =>] STRING_LITERAL
when Pragma_Title => Title : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Title,
Name_Subtitle);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_String_Literal (Args (J));
end if;
end loop;
end Title;
---------------------
-- Unchecked_Union --
---------------------
-- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
when Pragma_Unchecked_Union => Unchecked_Union : declare
Assoc : constant Node_Id := Arg1;
Type_Id : constant Node_Id := Expression (Assoc);
Typ : Entity_Id;
Discr : Entity_Id;
Tdef : Node_Id;
Clist : Node_Id;
Vpart : Node_Id;
Comp : Node_Id;
Variant : Node_Id;
begin
GNAT_Pragma;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if Rep_Item_Too_Late (Typ, N) then
return;
end if;
Check_First_Subtype (Arg1);
-- Note remaining cases are references to a type in the current
-- declarative part. If we find an error, we post the error on
-- the relevant type declaration at an appropriate point.
if not Is_Record_Type (Typ) then
Error_Msg_N ("Unchecked_Union must be record type", Typ);
return;
elsif Is_Tagged_Type (Typ) then
Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
return;
elsif Is_Limited_Type (Typ) then
Error_Msg_N
("Unchecked_Union must not be limited record type", Typ);
Explain_Limited_Type (Typ, Typ);
return;
else
if not Has_Discriminants (Typ) then
Error_Msg_N
("Unchecked_Union must have one discriminant", Typ);
return;
end if;
Discr := First_Discriminant (Typ);
while Present (Discr) loop
if No (Discriminant_Default_Value (Discr)) then
Error_Msg_N
("Unchecked_Union discriminant must have default value",
Discr);
end if;
Next_Discriminant (Discr);
end loop;
Tdef := Type_Definition (Declaration_Node (Typ));
Clist := Component_List (Tdef);
Comp := First (Component_Items (Clist));
while Present (Comp) loop
Check_Component (Comp);
Next (Comp);
end loop;
if No (Clist) or else No (Variant_Part (Clist)) then
Error_Msg_N
("Unchecked_Union must have variant part",
Tdef);
return;
end if;
Vpart := Variant_Part (Clist);
Variant := First (Variants (Vpart));
while Present (Variant) loop
Check_Variant (Variant);
Next (Variant);
end loop;
end if;
Set_Is_Unchecked_Union (Typ, True);
Set_Convention (Typ, Convention_C);
Set_Has_Unchecked_Union (Base_Type (Typ), True);
Set_Is_Unchecked_Union (Base_Type (Typ), True);
end Unchecked_Union;
------------------------
-- Unimplemented_Unit --
------------------------
-- pragma Unimplemented_Unit;
-- Note: this only gives an error if we are generating code,
-- or if we are in a generic library unit (where the pragma
-- appears in the body, not in the spec).
when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
Cunitent : constant Entity_Id :=
Cunit_Entity (Get_Source_Unit (Loc));
Ent_Kind : constant Entity_Kind :=
Ekind (Cunitent);
begin
GNAT_Pragma;
Check_Arg_Count (0);
if Operating_Mode = Generate_Code
or else Ent_Kind = E_Generic_Function
or else Ent_Kind = E_Generic_Procedure
or else Ent_Kind = E_Generic_Package
then
Get_Name_String (Chars (Cunitent));
Set_Casing (Mixed_Case);
Write_Str (Name_Buffer (1 .. Name_Len));
Write_Str (" is not implemented");
Write_Eol;
raise Unrecoverable_Error;
end if;
end Unimplemented_Unit;
--------------------
-- Universal_Data --
--------------------
-- pragma Universal_Data [(library_unit_NAME)];
when Pragma_Universal_Data =>
GNAT_Pragma;
-- If this is a configuration pragma, then set the universal
-- addressing option, otherwise confirm that the pragma
-- satisfies the requirements of library unit pragma placement
-- and leave it to the GNAAMP back end to detect the pragma
-- (avoids transitive setting of the option due to withed units).
if Is_Configuration_Pragma then
Universal_Addressing_On_AAMP := True;
else
Check_Valid_Library_Unit_Pragma;
end if;
if not AAMP_On_Target then
Error_Pragma ("?pragma% ignored (applies only to AAMP)");
end if;
------------------
-- Unreferenced --
------------------
-- pragma Unreferenced (local_Name {, local_Name});
-- or when used in a context clause:
-- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
when Pragma_Unreferenced => Unreferenced : declare
Arg_Node : Node_Id;
Arg_Expr : Node_Id;
Arg_Ent : Entity_Id;
Citem : Node_Id;
begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
-- Check case of appearing within context clause
if Is_In_Context_Clause then
-- The arguments must all be units mentioned in a with
-- clause in the same context clause. Note we already checked
-- (in Par.Prag) that the arguments are either identifiers or
Arg_Node := Arg1;
while Present (Arg_Node) loop
Citem := First (List_Containing (N));
while Citem /= N loop
if Nkind (Citem) = N_With_Clause
and then Same_Name (Name (Citem), Expression (Arg_Node))
then
Set_Has_Pragma_Unreferenced
(Cunit_Entity
(Get_Source_Unit
(Library_Unit (Citem))));
Set_Unit_Name (Expression (Arg_Node), Name (Citem));
exit;
end if;
Next (Citem);
end loop;
if Citem = N then
Error_Pragma_Arg
("argument of pragma% is not with'ed unit", Arg_Node);
end if;
Next (Arg_Node);
end loop;
-- Case of not in list of context items
else
Arg_Node := Arg1;
while Present (Arg_Node) loop
Check_No_Identifier (Arg_Node);
-- Note: the analyze call done by Check_Arg_Is_Local_Name
-- will in fact generate reference, so that the entity will
-- have a reference, which will inhibit any warnings about
-- it not being referenced, and also properly show up in the
-- ali file as a reference. But this reference is recorded
-- before the Has_Pragma_Unreferenced flag is set, so that
-- no warning is generated for this reference.
Check_Arg_Is_Local_Name (Arg_Node);
Arg_Expr := Get_Pragma_Arg (Arg_Node);
if Is_Entity_Name (Arg_Expr) then
Arg_Ent := Entity (Arg_Expr);
-- If the entity is overloaded, the pragma applies to the
-- most recent overloading, as documented. In this case,
-- name resolution does not generate a reference, so it
-- must be done here explicitly.
if Is_Overloaded (Arg_Expr) then
Generate_Reference (Arg_Ent, N);
end if;
Set_Has_Pragma_Unreferenced (Arg_Ent);
end if;
Next (Arg_Node);
end loop;
end if;
end Unreferenced;
------------------------------
-- Unreserve_All_Interrupts --
------------------------------
-- pragma Unreserve_All_Interrupts;
when Pragma_Unreserve_All_Interrupts =>
GNAT_Pragma;
Check_Arg_Count (0);
if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
Unreserve_All_Interrupts := True;
end if;
----------------
-- Unsuppress --
----------------
-- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
when Pragma_Unsuppress =>
GNAT_Pragma;
Process_Suppress_Unsuppress (False);
-------------------
-- Use_VADS_Size --
-------------------
-- pragma Use_VADS_Size;
when Pragma_Use_VADS_Size =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Use_VADS_Size := True;
---------------------
-- Validity_Checks --
---------------------
-- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
when Pragma_Validity_Checks => Validity_Checks : declare
A : constant Node_Id := Expression (Arg1);
S : String_Id;
C : Char_Code;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
if Nkind (A) = N_String_Literal then
S := Strval (A);
declare
Slen : constant Natural := Natural (String_Length (S));
Options : String (1 .. Slen);
J : Natural;
begin
J := 1;
loop
C := Get_String_Char (S, Int (J));
exit when not In_Character_Range (C);
Options (J) := Get_Character (C);
if J = Slen then
Set_Validity_Check_Options (Options);
exit;
else
J := J + 1;
end if;
end loop;
end;
elsif Nkind (A) = N_Identifier then
if Chars (A) = Name_All_Checks then
Set_Validity_Check_Options ("a");
elsif Chars (A) = Name_On then
Validity_Checks_On := True;
elsif Chars (A) = Name_Off then
Validity_Checks_On := False;
end if;
end if;
end Validity_Checks;
--------------
-- Volatile --
--------------
-- pragma Volatile (LOCAL_NAME);
when Pragma_Volatile =>
Process_Atomic_Shared_Volatile;
-------------------------
-- Volatile_Components --
-------------------------
-- pragma Volatile_Components (array_LOCAL_NAME);
-- Volatile is handled by the same circuit as Atomic_Components
--------------
-- Warnings --
--------------
-- pragma Warnings (On | Off);
-- pragma Warnings (On | Off, LOCAL_NAME);
-- pragma Warnings (static_string_EXPRESSION);
-- pragma Warnings (On | Off, STRING_LITERAL);
when Pragma_Warnings => Warnings : begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
Check_No_Identifiers;
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
-- One argument case
if Arg_Count = 1 then
-- On/Off one argument case was processed by parser
if Nkind (Argx) = N_Identifier
and then
(Chars (Argx) = Name_On
or else
Chars (Argx) = Name_Off)
then
null;
-- One argument case must be ON/OFF or static string expr
elsif not Is_Static_String_Expression (Arg1) then
Error_Pragma_Arg
("argument of pragma% must be On/Off or " &
"static string expression", Arg2);
-- One argument string expression case
else
declare
Lit : constant Node_Id := Expr_Value_S (Argx);
Str : constant String_Id := Strval (Lit);
C : Char_Code;
begin
for J in 1 .. String_Length (Str) loop
C := Get_String_Char (Str, J);
if In_Character_Range (C)
and then Set_Warning_Switch (Get_Character (C))
then
null;
else
Error_Pragma_Arg
("invalid warning switch character", Arg1);
end if;
end loop;
end;
end if;
-- Two or more arguments (must be two)
else
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
Check_At_Most_N_Arguments (2);
declare
E_Id : Node_Id;
E : Entity_Id;
Err : Boolean;
begin
E_Id := Expression (Arg2);
Analyze (E_Id);
-- In the expansion of an inlined body, a reference to
-- the formal may be wrapped in a conversion if the
-- actual is a conversion. Retrieve the real entity name.
if (In_Instance_Body
or else In_Inlined_Body)
and then Nkind (E_Id) = N_Unchecked_Type_Conversion
then
E_Id := Expression (E_Id);
end if;
-- Entity name case
if Is_Entity_Name (E_Id) then
E := Entity (E_Id);
if E = Any_Id then
return;
else
loop
Set_Warnings_Off
(E, (Chars (Expression (Arg1)) = Name_Off));
if Is_Enumeration_Type (E) then
declare
Lit : Entity_Id;
begin
Lit := First_Literal (E);
while Present (Lit) loop
Set_Warnings_Off (Lit);
Next_Literal (Lit);
end loop;
end;
end if;
exit when No (Homonym (E));
E := Homonym (E);
end loop;
end if;
-- Error if not entity or static string literal case
elsif not Is_Static_String_Expression (Arg2) then
Error_Pragma_Arg
("second argument of pragma% must be entity " &
"name or static string expression", Arg2);
-- String literal case
else
String_To_Name_Buffer
(Strval (Expr_Value_S (Expression (Arg2))));
-- Configuration pragma case
if Is_Configuration_Pragma then
if Chars (Argx) = Name_On then
Error_Pragma
("pragma Warnings (Off, string) cannot be " &
"used as configuration pragma");
else
Set_Specific_Warning_Off
(No_Location, Name_Buffer (1 .. Name_Len));
end if;
-- Normal (non-configuration pragma) case
else
if Chars (Argx) = Name_Off then
Set_Specific_Warning_Off
(Loc, Name_Buffer (1 .. Name_Len));
elsif Chars (Argx) = Name_On then
Set_Specific_Warning_On
(Loc, Name_Buffer (1 .. Name_Len), Err);
if Err then
Error_Msg
("?pragma Warnings On with no " &
"matching Warnings Off",
Loc);
end if;
end if;
end if;
end if;
end;
end if;
end;
end Warnings;
-------------------
-- Weak_External --
-------------------
-- pragma Weak_External ([Entity =>] LOCAL_NAME);
when Pragma_Weak_External => Weak_External : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Ent := Entity (Expression (Arg1));
if Rep_Item_Too_Early (Ent, N) then
return;
else
Ent := Underlying_Type (Ent);
end if;
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Ent, N) then
return;
else
Set_Has_Gigi_Rep_Item (Ent);
end if;
end Weak_External;
-----------------------------
-- Wide_Character_Encoding --
-----------------------------
-- pragma Wide_Character_Encoding (IDENTIFIER);
when Pragma_Wide_Character_Encoding =>
-- Nothing to do, handled in parser. Note that we do not enforce
-- configuration pragma placement, this pragma can appear at any
-- place in the source, allowing mixed encodings within a single
-- source program.
null;
--------------------
-- Unknown_Pragma --
--------------------
-- Should be impossible, since the case of an unknown pragma is
-- separately processed before the case statement is entered.
when Unknown_Pragma =>
raise Program_Error;
end case;
exception
when Pragma_Exit => null;
end Analyze_Pragma;
---------------------------------
-- Delay_Config_Pragma_Analyze --
---------------------------------
function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
begin
return Chars (N) = Name_Interrupt_State
or else
Chars (N) = Name_Priority_Specific_Dispatching;
end Delay_Config_Pragma_Analyze;
-------------------------
-- Get_Base_Subprogram --
-------------------------
function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
Result : Entity_Id;
begin
-- Follow subprogram renaming chain
Result := Def_Id;
while Is_Subprogram (Result)
and then
(Is_Generic_Instance (Result)
or else Nkind (Parent (Declaration_Node (Result))) =
N_Subprogram_Renaming_Declaration)
and then Present (Alias (Result))
loop
Result := Alias (Result);
end loop;
return Result;
end Get_Base_Subprogram;
-----------------------------
-- Is_Config_Static_String --
-----------------------------
function Is_Config_Static_String (Arg : Node_Id) return Boolean is
function Add_Config_Static_String (Arg : Node_Id) return Boolean;
-- This is an internal recursive function that is just like the
-- outer function except that it adds the string to the name buffer
-- rather than placing the string in the name buffer.
------------------------------
-- Add_Config_Static_String --
------------------------------
function Add_Config_Static_String (Arg : Node_Id) return Boolean is
N : Node_Id;
C : Char_Code;
begin
N := Arg;
if Nkind (N) = N_Op_Concat then
if Add_Config_Static_String (Left_Opnd (N)) then
N := Right_Opnd (N);
else
return False;
end if;
end if;
if Nkind (N) /= N_String_Literal then
Error_Msg_N ("string literal expected for pragma argument", N);
return False;
else
for J in 1 .. String_Length (Strval (N)) loop
C := Get_String_Char (Strval (N), J);
if not In_Character_Range (C) then
Error_Msg
("string literal contains invalid wide character",
Sloc (N) + 1 + Source_Ptr (J));
return False;
end if;
Add_Char_To_Name_Buffer (Get_Character (C));
end loop;
end if;
return True;
end Add_Config_Static_String;
-- Start of prorcessing for Is_Config_Static_String
begin
Name_Len := 0;
return Add_Config_Static_String (Arg);
end Is_Config_Static_String;
-----------------------------------------
-- Is_Non_Significant_Pragma_Reference --
-----------------------------------------
-- This function makes use of the following static table which indicates
-- whether a given pragma is significant. A value of -1 in this table
-- indicates that the reference is significant. A value of zero indicates
-- than appearence as any argument is insignificant, a positive value
-- indicates that appearence in that parameter position is significant.
Sig_Flags : constant array (Pragma_Id) of Int :=
(Pragma_AST_Entry => -1,
Pragma_Abort_Defer => -1,
Pragma_Ada_83 => -1,
Pragma_Ada_95 => -1,
Pragma_Ada_05 => -1,
Pragma_Ada_2005 => -1,
Pragma_All_Calls_Remote => -1,
Pragma_Annotate => -1,
Pragma_Assert => -1,
Pragma_Assertion_Policy => 0,
Pragma_Asynchronous => -1,
Pragma_Atomic => 0,
Pragma_Atomic_Components => 0,
Pragma_Attach_Handler => -1,
Pragma_CPP_Class => 0,
Pragma_CPP_Constructor => 0,
Pragma_CPP_Virtual => 0,
Pragma_CPP_Vtable => 0,
Pragma_C_Pass_By_Copy => 0,
Pragma_Comment => 0,
Pragma_Common_Object => -1,
Pragma_Compile_Time_Warning => -1,
Pragma_Complete_Representation => 0,
Pragma_Complex_Representation => 0,
Pragma_Component_Alignment => -1,
Pragma_Controlled => 0,
Pragma_Convention => 0,
Pragma_Convention_Identifier => 0,
Pragma_Debug => -1,
Pragma_Debug_Policy => 0,
Pragma_Detect_Blocking => -1,
Pragma_Discard_Names => 0,
Pragma_Elaborate => -1,
Pragma_Elaborate_All => -1,
Pragma_Elaborate_Body => -1,
Pragma_Elaboration_Checks => -1,
Pragma_Eliminate => -1,
Pragma_Explicit_Overriding => -1,
Pragma_Export => -1,
Pragma_Export_Exception => -1,
Pragma_Export_Function => -1,
Pragma_Export_Object => -1,
Pragma_Export_Procedure => -1,
Pragma_Export_Value => -1,
Pragma_Export_Valued_Procedure => -1,
Pragma_Extend_System => -1,
Pragma_Extensions_Allowed => -1,
Pragma_External => -1,
Pragma_External_Name_Casing => -1,
Pragma_Finalize_Storage_Only => 0,
Pragma_Float_Representation => 0,
Pragma_Ident => -1,
Pragma_Import => +2,
Pragma_Import_Exception => 0,
Pragma_Import_Function => 0,
Pragma_Import_Object => 0,
Pragma_Import_Procedure => 0,
Pragma_Import_Valued_Procedure => 0,
Pragma_Initialize_Scalars => -1,
Pragma_Inline => 0,
Pragma_Inline_Always => 0,
Pragma_Inline_Generic => 0,
Pragma_Inspection_Point => -1,
Pragma_Interface => +2,
Pragma_Interface_Name => +2,
Pragma_Interrupt_Handler => -1,
Pragma_Interrupt_Priority => -1,
Pragma_Interrupt_State => -1,
Pragma_Java_Constructor => -1,
Pragma_Java_Interface => -1,
Pragma_Keep_Names => 0,
Pragma_License => -1,
Pragma_Link_With => -1,
Pragma_Linker_Alias => -1,
Pragma_Linker_Constructor => -1,
Pragma_Linker_Destructor => -1,
Pragma_Linker_Options => -1,
Pragma_Linker_Section => -1,
Pragma_List => -1,
Pragma_Locking_Policy => -1,
Pragma_Long_Float => -1,
Pragma_Machine_Attribute => -1,
Pragma_Main => -1,
Pragma_Main_Storage => -1,
Pragma_Memory_Size => -1,
Pragma_No_Return => 0,
Pragma_No_Run_Time => -1,
Pragma_No_Strict_Aliasing => -1,
Pragma_Normalize_Scalars => -1,
Pragma_Obsolescent => 0,
Pragma_Optimize => -1,
Pragma_Optional_Overriding => -1,
Pragma_Pack => 0,
Pragma_Page => -1,
Pragma_Passive => -1,
Pragma_Preelaborable_Initialization => -1,
Pragma_Polling => -1,
Pragma_Persistent_BSS => 0,
Pragma_Preelaborate => -1,
Pragma_Preelaborate_05 => -1,
Pragma_Priority => -1,
Pragma_Priority_Specific_Dispatching => -1,
Pragma_Profile => 0,
Pragma_Profile_Warnings => 0,
Pragma_Propagate_Exceptions => -1,
Pragma_Psect_Object => -1,
Pragma_Pure => -1,
Pragma_Pure_05 => -1,
Pragma_Pure_Function => -1,
Pragma_Queuing_Policy => -1,
Pragma_Ravenscar => -1,
Pragma_Remote_Call_Interface => -1,
Pragma_Remote_Types => -1,
Pragma_Restricted_Run_Time => -1,
Pragma_Restriction_Warnings => -1,
Pragma_Restrictions => -1,
Pragma_Reviewable => -1,
Pragma_Share_Generic => -1,
Pragma_Shared => -1,
Pragma_Shared_Passive => -1,
Pragma_Source_File_Name => -1,
Pragma_Source_File_Name_Project => -1,
Pragma_Source_Reference => -1,
Pragma_Storage_Size => -1,
Pragma_Storage_Unit => -1,
Pragma_Stream_Convert => -1,
Pragma_Style_Checks => -1,
Pragma_Subtitle => -1,
Pragma_Suppress => 0,
Pragma_Suppress_Exception_Locations => 0,
Pragma_Suppress_All => -1,
Pragma_Suppress_Debug_Info => 0,
Pragma_Suppress_Initialization => 0,
Pragma_System_Name => -1,
Pragma_Task_Dispatching_Policy => -1,
Pragma_Task_Info => -1,
Pragma_Task_Name => -1,
Pragma_Task_Storage => 0,
Pragma_Thread_Body => +2,
Pragma_Time_Slice => -1,
Pragma_Title => -1,
Pragma_Unchecked_Union => 0,
Pragma_Unimplemented_Unit => -1,
Pragma_Universal_Data => -1,
Pragma_Unreferenced => -1,
Pragma_Unreserve_All_Interrupts => -1,
Pragma_Unsuppress => 0,
Pragma_Use_VADS_Size => -1,
Pragma_Validity_Checks => -1,
Pragma_Volatile => 0,
Pragma_Volatile_Components => 0,
Pragma_Warnings => -1,
Pragma_Weak_External => -1,
Pragma_Wide_Character_Encoding => 0,
Unknown_Pragma => 0);
function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
P : Node_Id;
C : Int;
A : Node_Id;
begin
P := Parent (N);
if Nkind (P) /= N_Pragma_Argument_Association then
return False;
else
C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
case C is
when -1 =>
return False;
when 0 =>
return True;
when others =>
A := First (Pragma_Argument_Associations (Parent (P)));
for J in 1 .. C - 1 loop
if No (A) then
return False;
end if;
Next (A);
end loop;
return A = P;
end case;
end if;
end Is_Non_Significant_Pragma_Reference;
------------------------------
-- Is_Pragma_String_Literal --
------------------------------
-- This function returns true if the corresponding pragma argument is
-- a static string expression. These are the only cases in which string
-- literals can appear as pragma arguments. We also allow a string
-- literal as the first argument to pragma Assert (although it will
-- of course always generate a type error).
function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
Pragn : constant Node_Id := Parent (Par);
Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
Pname : constant Name_Id := Chars (Pragn);
Argn : Natural;
N : Node_Id;
begin
Argn := 1;
N := First (Assoc);
loop
exit when N = Par;
Argn := Argn + 1;
Next (N);
end loop;
if Pname = Name_Assert then
return True;
elsif Pname = Name_Export then
return Argn > 2;
elsif Pname = Name_Ident then
return Argn = 1;
elsif Pname = Name_Import then
return Argn > 2;
elsif Pname = Name_Interface_Name then
return Argn > 1;
elsif Pname = Name_Linker_Alias then
return Argn = 2;
elsif Pname = Name_Linker_Section then
return Argn = 2;
elsif Pname = Name_Machine_Attribute then
return Argn = 2;
elsif Pname = Name_Source_File_Name then
return True;
elsif Pname = Name_Source_Reference then
return Argn = 2;
elsif Pname = Name_Title then
return True;
elsif Pname = Name_Subtitle then
return True;
else
return False;
end if;
end Is_Pragma_String_Literal;
--------------------------------------
-- Process_Compilation_Unit_Pragmas --
--------------------------------------
procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
begin
-- A special check for pragma Suppress_All. This is a strange DEC
-- pragma, strange because it comes at the end of the unit. If we
-- have a pragma Suppress_All in the Pragmas_After of the current
-- unit, then we insert a pragma Suppress (All_Checks) at the start
-- of the context clause to ensure the correct processing.
declare
PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
P : Node_Id;
begin
if Present (PA) then
P := First (PA);
while Present (P) loop
if Chars (P) = Name_Suppress_All then
Prepend_To (Context_Items (N),
Make_Pragma (Sloc (P),
Chars => Name_Suppress,
Pragma_Argument_Associations => New_List (
Make_Pragma_Argument_Association (Sloc (P),
Expression =>
Make_Identifier (Sloc (P),
Chars => Name_All_Checks)))));
exit;
end if;
Next (P);
end loop;
end if;
end;
end Process_Compilation_Unit_Pragmas;
--------------------------------
-- Set_Encoded_Interface_Name --
--------------------------------
procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
Str : constant String_Id := Strval (S);
Len : constant Int := String_Length (Str);
CC : Char_Code;
C : Character;
J : Int;
Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
procedure Encode;
-- Stores encoded value of character code CC. The encoding we
-- use an underscore followed by four lower case hex digits.
------------
-- Encode --
------------
procedure Encode is
begin
Store_String_Char (Get_Char_Code ('_'));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC and 16#0F#))));
end Encode;
-- Start of processing for Set_Encoded_Interface_Name
begin
-- If first character is asterisk, this is a link name, and we
-- leave it completely unmodified. We also ignore null strings
-- (the latter case happens only in error cases) and no encoding
-- should occur for Java interface names.
if Len = 0
or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
or else Java_VM
then
Set_Interface_Name (E, S);
else
J := 1;
loop
CC := Get_String_Char (Str, J);
exit when not In_Character_Range (CC);
C := Get_Character (CC);
exit when C /= '_' and then C /= '$'
and then C not in '0' .. '9'
and then C not in 'a' .. 'z'
and then C not in 'A' .. 'Z';
if J = Len then
Set_Interface_Name (E, S);
return;
else
J := J + 1;
end if;
end loop;
-- Here we need to encode. The encoding we use as follows:
-- three underscores + four hex digits (lower case)
Start_String;
for J in 1 .. String_Length (Str) loop
CC := Get_String_Char (Str, J);
if not In_Character_Range (CC) then
Encode;
else
C := Get_Character (CC);
if C = '_' or else C = '$'
or else C in '0' .. '9'
or else C in 'a' .. 'z'
or else C in 'A' .. 'Z'
then
Store_String_Char (CC);
else
Encode;
end if;
end if;
end loop;
Set_Interface_Name (E,
Make_String_Literal (Sloc (S),
Strval => End_String));
end if;
end Set_Encoded_Interface_Name;
-------------------
-- Set_Unit_Name --
-------------------
procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
Pref : Node_Id;
Scop : Entity_Id;
begin
if Nkind (N) = N_Identifier
and then Nkind (With_Item) = N_Identifier
then
Set_Entity (N, Entity (With_Item));
elsif Nkind (N) = N_Selected_Component then
Change_Selected_Component_To_Expanded_Name (N);
Set_Entity (N, Entity (With_Item));
Set_Entity (Selector_Name (N), Entity (N));
Pref := Prefix (N);
Scop := Scope (Entity (N));
while Nkind (Pref) = N_Selected_Component loop
Change_Selected_Component_To_Expanded_Name (Pref);
Set_Entity (Selector_Name (Pref), Scop);
Set_Entity (Pref, Scop);
Pref := Prefix (Pref);
Scop := Scope (Scop);
end loop;
Set_Entity (Pref, Scop);
end if;
end Set_Unit_Name;
end Sem_Prag;
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