1213 lines
43 KiB
Ada
1213 lines
43 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- P A R . P R A G --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Generally the parser checks the basic syntax of pragmas, but does not
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-- do specialized syntax checks for individual pragmas, these are deferred
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-- to semantic analysis time (see unit Sem_Prag). There are some pragmas
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-- which require recognition and either partial or complete processing
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-- during parsing, and this unit performs this required processing.
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with Fname.UF; use Fname.UF;
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with Osint; use Osint;
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with Rident; use Rident;
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with Restrict; use Restrict;
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with Stringt; use Stringt;
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with Stylesw; use Stylesw;
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with Uintp; use Uintp;
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with Uname; use Uname;
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with System.WCh_Con; use System.WCh_Con;
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separate (Par)
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function Prag (Pragma_Node : Node_Id; Semi : Source_Ptr) return Node_Id is
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Pragma_Name : constant Name_Id := Chars (Pragma_Node);
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Prag_Id : constant Pragma_Id := Get_Pragma_Id (Pragma_Name);
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Pragma_Sloc : constant Source_Ptr := Sloc (Pragma_Node);
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Arg_Count : Nat;
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Arg_Node : Node_Id;
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-----------------------
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-- Local Subprograms --
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-----------------------
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function Arg1 return Node_Id;
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function Arg2 return Node_Id;
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function Arg3 return Node_Id;
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-- Obtain specified Pragma_Argument_Association. It is allowable to call
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-- the routine for the argument one past the last present argument, but
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-- that is the only case in which a non-present argument can be referenced.
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procedure Check_Arg_Count (Required : Int);
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-- Check argument count for pragma = Required.
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-- If not give error and raise Error_Resync.
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procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
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-- Check the expression of the specified argument to make sure that it
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-- is a string literal. If not give error and raise Error_Resync.
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procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id);
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-- Check the expression of the specified argument to make sure that it
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-- is an identifier which is either ON or OFF, and if not, then issue
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-- an error message and raise Error_Resync.
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procedure Check_No_Identifier (Arg : Node_Id);
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-- Checks that the given argument does not have an identifier. If
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-- an identifier is present, then an error message is issued, and
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-- Error_Resync is raised.
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procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
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-- Checks if the given argument has an identifier, and if so, requires
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-- it to match the given identifier name. If there is a non-matching
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-- identifier, then an error message is given and Error_Resync raised.
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procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id);
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-- Same as Check_Optional_Identifier, except that the name is required
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-- to be present and to match the given Id value.
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procedure Process_Restrictions_Or_Restriction_Warnings;
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-- Common processing for Restrictions and Restriction_Warnings pragmas.
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-- This routine only processes the case of No_Obsolescent_Features,
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-- which is the only restriction that has syntactic effects. No general
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-- error checking is done, since this will be done in Sem_Prag. The
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-- other case processed is pragma Restrictions No_Dependence, since
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-- otherwise this is done too late.
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----------
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-- Arg1 --
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----------
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function Arg1 return Node_Id is
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begin
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return First (Pragma_Argument_Associations (Pragma_Node));
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end Arg1;
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----------
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-- Arg2 --
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----------
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function Arg2 return Node_Id is
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begin
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return Next (Arg1);
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end Arg2;
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----------
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-- Arg3 --
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----------
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function Arg3 return Node_Id is
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begin
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return Next (Arg2);
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end Arg3;
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---------------------
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-- Check_Arg_Count --
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---------------------
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procedure Check_Arg_Count (Required : Int) is
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begin
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if Arg_Count /= Required then
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Error_Msg ("wrong number of arguments for pragma%", Pragma_Sloc);
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raise Error_Resync;
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end if;
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end Check_Arg_Count;
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----------------------------
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-- Check_Arg_Is_On_Or_Off --
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----------------------------
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procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id) is
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Argx : constant Node_Id := Expression (Arg);
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begin
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if Nkind (Expression (Arg)) /= N_Identifier
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or else (Chars (Argx) /= Name_On
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and then
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Chars (Argx) /= Name_Off)
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then
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Error_Msg_Name_2 := Name_On;
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Error_Msg_Name_3 := Name_Off;
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Error_Msg
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("argument for pragma% must be% or%", Sloc (Argx));
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raise Error_Resync;
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end if;
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end Check_Arg_Is_On_Or_Off;
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---------------------------------
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-- Check_Arg_Is_String_Literal --
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---------------------------------
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procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
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begin
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if Nkind (Expression (Arg)) /= N_String_Literal then
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Error_Msg
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("argument for pragma% must be string literal",
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Sloc (Expression (Arg)));
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raise Error_Resync;
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end if;
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end Check_Arg_Is_String_Literal;
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-------------------------
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-- Check_No_Identifier --
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-------------------------
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procedure Check_No_Identifier (Arg : Node_Id) is
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begin
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if Chars (Arg) /= No_Name then
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Error_Msg_N ("pragma% does not permit named arguments", Arg);
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raise Error_Resync;
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end if;
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end Check_No_Identifier;
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-------------------------------
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-- Check_Optional_Identifier --
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-------------------------------
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procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
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begin
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if Present (Arg) and then Chars (Arg) /= No_Name then
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if Chars (Arg) /= Id then
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Error_Msg_Name_2 := Id;
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Error_Msg_N ("pragma% argument expects identifier%", Arg);
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end if;
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end if;
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end Check_Optional_Identifier;
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-------------------------------
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-- Check_Required_Identifier --
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-------------------------------
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procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id) is
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begin
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if Chars (Arg) /= Id then
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Error_Msg_Name_2 := Id;
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Error_Msg_N ("pragma% argument must have identifier%", Arg);
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end if;
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end Check_Required_Identifier;
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--------------------------------------------------
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-- Process_Restrictions_Or_Restriction_Warnings --
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--------------------------------------------------
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procedure Process_Restrictions_Or_Restriction_Warnings is
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Arg : Node_Id;
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Id : Name_Id;
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Expr : Node_Id;
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begin
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Arg := Arg1;
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while Present (Arg) loop
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Id := Chars (Arg);
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Expr := Expression (Arg);
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if Id = No_Name
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and then Nkind (Expr) = N_Identifier
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and then Get_Restriction_Id (Chars (Expr)) = No_Obsolescent_Features
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then
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Set_Restriction (No_Obsolescent_Features, Pragma_Node);
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Restriction_Warnings (No_Obsolescent_Features) :=
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Prag_Id = Pragma_Restriction_Warnings;
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elsif Id = Name_No_Dependence then
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Set_Restriction_No_Dependence
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(Unit => Expr,
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Warn => Prag_Id = Pragma_Restriction_Warnings);
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end if;
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Next (Arg);
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end loop;
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end Process_Restrictions_Or_Restriction_Warnings;
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-- Start if processing for Prag
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begin
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Error_Msg_Name_1 := Pragma_Name;
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-- Ignore unrecognized pragma. We let Sem post the warning for this, since
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-- it is a semantic error, not a syntactic one (we have already checked
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-- the syntax for the unrecognized pragma as required by (RM 2.8(11)).
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if Prag_Id = Unknown_Pragma then
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return Pragma_Node;
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end if;
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-- Count number of arguments. This loop also checks if any of the arguments
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-- are Error, indicating a syntax error as they were parsed. If so, we
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-- simply return, because we get into trouble with cascaded errors if we
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-- try to perform our error checks on junk arguments.
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Arg_Count := 0;
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if Present (Pragma_Argument_Associations (Pragma_Node)) then
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Arg_Node := Arg1;
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while Arg_Node /= Empty loop
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Arg_Count := Arg_Count + 1;
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if Expression (Arg_Node) = Error then
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return Error;
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end if;
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Next (Arg_Node);
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end loop;
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end if;
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-- Remaining processing is pragma dependent
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case Prag_Id is
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------------
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-- Ada_83 --
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------------
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-- This pragma must be processed at parse time, since we want to set
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-- the Ada version properly at parse time to recognize the appropriate
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-- Ada version syntax.
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when Pragma_Ada_83 =>
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Ada_Version := Ada_83;
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Ada_Version_Explicit := Ada_Version;
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------------
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-- Ada_95 --
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------------
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-- This pragma must be processed at parse time, since we want to set
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-- the Ada version properly at parse time to recognize the appropriate
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-- Ada version syntax.
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when Pragma_Ada_95 =>
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Ada_Version := Ada_95;
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Ada_Version_Explicit := Ada_Version;
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---------------------
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-- Ada_05/Ada_2005 --
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---------------------
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-- This pragma must be processed at parse time, since we want to set
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-- the Ada version properly at parse time to recognize the appropriate
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-- Ada version syntax. However, it is only the zero argument form that
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-- must be processed at parse time.
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when Pragma_Ada_05 | Pragma_Ada_2005 =>
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if Arg_Count = 0 then
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Ada_Version := Ada_05;
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Ada_Version_Explicit := Ada_05;
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end if;
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-----------
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-- Debug --
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-----------
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-- pragma Debug (PROCEDURE_CALL_STATEMENT);
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-- This has to be processed by the parser because of the very peculiar
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-- form of the second parameter, which is syntactically from a formal
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-- point of view a function call (since it must be an expression), but
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-- semantically we treat it as a procedure call (which has exactly the
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-- same syntactic form, so that's why we can get away with this!)
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when Pragma_Debug => Debug : declare
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Expr : Node_Id;
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begin
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if Arg_Count = 2 then
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Check_No_Identifier (Arg1);
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Check_No_Identifier (Arg2);
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Expr := New_Copy (Expression (Arg2));
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else
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Check_Arg_Count (1);
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Check_No_Identifier (Arg1);
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Expr := New_Copy (Expression (Arg1));
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end if;
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if Nkind (Expr) /= N_Indexed_Component
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and then Nkind (Expr) /= N_Function_Call
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and then Nkind (Expr) /= N_Identifier
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and then Nkind (Expr) /= N_Selected_Component
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then
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Error_Msg
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("argument of pragma% is not procedure call", Sloc (Expr));
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raise Error_Resync;
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else
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Set_Debug_Statement
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(Pragma_Node, P_Statement_Name (Expr));
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end if;
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end Debug;
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-------------------------------
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-- Extensions_Allowed (GNAT) --
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-------------------------------
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-- pragma Extensions_Allowed (Off | On)
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-- The processing for pragma Extensions_Allowed must be done at
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-- parse time, since extensions mode may affect what is accepted.
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when Pragma_Extensions_Allowed =>
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Check_Arg_Count (1);
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Check_No_Identifier (Arg1);
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Check_Arg_Is_On_Or_Off (Arg1);
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if Chars (Expression (Arg1)) = Name_On then
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Extensions_Allowed := True;
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Ada_Version := Ada_Version_Type'Last;
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else
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Extensions_Allowed := False;
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Ada_Version := Ada_Version_Type'Min (Ada_Version, Ada_95);
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end if;
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Ada_Version_Explicit := Ada_Version;
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----------------
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-- List (2.8) --
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----------------
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-- pragma List (Off | On)
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-- The processing for pragma List must be done at parse time,
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-- since a listing can be generated in parse only mode.
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when Pragma_List =>
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Check_Arg_Count (1);
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Check_No_Identifier (Arg1);
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Check_Arg_Is_On_Or_Off (Arg1);
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-- We unconditionally make a List_On entry for the pragma, so that
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-- in the List (Off) case, the pragma will print even in a region
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-- of code with listing turned off (this is required!)
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List_Pragmas.Increment_Last;
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List_Pragmas.Table (List_Pragmas.Last) :=
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(Ptyp => List_On, Ploc => Sloc (Pragma_Node));
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-- Now generate the list off entry for pragma List (Off)
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if Chars (Expression (Arg1)) = Name_Off then
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List_Pragmas.Increment_Last;
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List_Pragmas.Table (List_Pragmas.Last) :=
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(Ptyp => List_Off, Ploc => Semi);
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end if;
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----------------
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-- Page (2.8) --
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----------------
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-- pragma Page;
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-- Processing for this pragma must be done at parse time, since a
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-- listing can be generated in parse only mode with semantics off.
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when Pragma_Page =>
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Check_Arg_Count (0);
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List_Pragmas.Increment_Last;
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List_Pragmas.Table (List_Pragmas.Last) := (Page, Semi);
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------------------
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-- Restrictions --
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------------------
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-- pragma Restrictions (RESTRICTION {, RESTRICTION});
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-- RESTRICTION ::=
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-- restriction_IDENTIFIER
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-- | restriction_parameter_IDENTIFIER => EXPRESSION
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-- We process the case of No_Obsolescent_Features, since this has
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-- a syntactic effect that we need to detect at parse time (the use
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-- of replacement characters such as colon for pound sign).
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when Pragma_Restrictions =>
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Process_Restrictions_Or_Restriction_Warnings;
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--------------------------
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-- Restriction_Warnings --
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--------------------------
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-- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
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-- RESTRICTION ::=
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-- restriction_IDENTIFIER
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-- | restriction_parameter_IDENTIFIER => EXPRESSION
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-- See above comment for pragma Restrictions
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when Pragma_Restriction_Warnings =>
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Process_Restrictions_Or_Restriction_Warnings;
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----------------------------------------------------------
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-- Source_File_Name and Source_File_Name_Project (GNAT) --
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----------------------------------------------------------
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-- These two pragmas have the same syntax and semantics.
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-- There are five forms of these pragmas:
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-- pragma Source_File_Name[_Project] (
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-- [UNIT_NAME =>] unit_NAME,
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-- BODY_FILE_NAME => STRING_LITERAL
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-- [, [INDEX =>] INTEGER_LITERAL]);
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-- pragma Source_File_Name[_Project] (
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-- [UNIT_NAME =>] unit_NAME,
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-- SPEC_FILE_NAME => STRING_LITERAL
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-- [, [INDEX =>] INTEGER_LITERAL]);
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-- pragma Source_File_Name[_Project] (
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-- BODY_FILE_NAME => STRING_LITERAL
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-- [, DOT_REPLACEMENT => STRING_LITERAL]
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-- [, CASING => CASING_SPEC]);
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-- pragma Source_File_Name[_Project] (
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-- SPEC_FILE_NAME => STRING_LITERAL
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-- [, DOT_REPLACEMENT => STRING_LITERAL]
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-- [, CASING => CASING_SPEC]);
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-- pragma Source_File_Name[_Project] (
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-- SUBUNIT_FILE_NAME => STRING_LITERAL
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-- [, DOT_REPLACEMENT => STRING_LITERAL]
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-- [, CASING => CASING_SPEC]);
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-- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
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-- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
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-- Source_File_Name (SFN), however their usage is exclusive:
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-- SFN can only be used when no project file is used, while
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-- SFNP can only be used when a project file is used.
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-- The Project Manager produces a configuration pragmas file that
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-- is communicated to the compiler with -gnatec switch. This file
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-- contains only SFNP pragmas (at least two for the default naming
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-- scheme. As this configuration pragmas file is always the first
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-- processed by the compiler, it prevents the use of pragmas SFN in
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-- other config files when a project file is in use.
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-- Note: we process this during parsing, since we need to have the
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-- source file names set well before the semantic analysis starts,
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-- since we load the spec and with'ed packages before analysis.
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when Pragma_Source_File_Name | Pragma_Source_File_Name_Project =>
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Source_File_Name : declare
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Unam : Unit_Name_Type;
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Expr1 : Node_Id;
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Pat : String_Ptr;
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Typ : Character;
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Dot : String_Ptr;
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Cas : Casing_Type;
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Nast : Nat;
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Expr : Node_Id;
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Index : Nat;
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function Get_Fname (Arg : Node_Id) return Name_Id;
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-- Process file name from unit name form of pragma
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function Get_String_Argument (Arg : Node_Id) return String_Ptr;
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-- Process string literal value from argument
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procedure Process_Casing (Arg : Node_Id);
|
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-- Process Casing argument of pattern form of pragma
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|
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procedure Process_Dot_Replacement (Arg : Node_Id);
|
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-- Process Dot_Replacement argument of patterm form of pragma
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|
|
---------------
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-- Get_Fname --
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---------------
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|
|
function Get_Fname (Arg : Node_Id) return Name_Id is
|
|
begin
|
|
String_To_Name_Buffer (Strval (Expression (Arg)));
|
|
|
|
for J in 1 .. Name_Len loop
|
|
if Is_Directory_Separator (Name_Buffer (J)) then
|
|
Error_Msg
|
|
("directory separator character not allowed",
|
|
Sloc (Expression (Arg)) + Source_Ptr (J));
|
|
end if;
|
|
end loop;
|
|
|
|
return Name_Find;
|
|
end Get_Fname;
|
|
|
|
-------------------------
|
|
-- Get_String_Argument --
|
|
-------------------------
|
|
|
|
function Get_String_Argument (Arg : Node_Id) return String_Ptr is
|
|
Str : String_Id;
|
|
|
|
begin
|
|
if Nkind (Expression (Arg)) /= N_String_Literal
|
|
and then
|
|
Nkind (Expression (Arg)) /= N_Operator_Symbol
|
|
then
|
|
Error_Msg_N
|
|
("argument for pragma% must be string literal", Arg);
|
|
raise Error_Resync;
|
|
end if;
|
|
|
|
Str := Strval (Expression (Arg));
|
|
|
|
-- Check string has no wide chars
|
|
|
|
for J in 1 .. String_Length (Str) loop
|
|
if Get_String_Char (Str, J) > 255 then
|
|
Error_Msg
|
|
("wide character not allowed in pattern for pragma%",
|
|
Sloc (Expression (Arg2)) + Text_Ptr (J) - 1);
|
|
end if;
|
|
end loop;
|
|
|
|
-- Acquire string
|
|
|
|
String_To_Name_Buffer (Str);
|
|
return new String'(Name_Buffer (1 .. Name_Len));
|
|
end Get_String_Argument;
|
|
|
|
--------------------
|
|
-- Process_Casing --
|
|
--------------------
|
|
|
|
procedure Process_Casing (Arg : Node_Id) is
|
|
Expr : constant Node_Id := Expression (Arg);
|
|
|
|
begin
|
|
Check_Required_Identifier (Arg, Name_Casing);
|
|
|
|
if Nkind (Expr) = N_Identifier then
|
|
if Chars (Expr) = Name_Lowercase then
|
|
Cas := All_Lower_Case;
|
|
return;
|
|
elsif Chars (Expr) = Name_Uppercase then
|
|
Cas := All_Upper_Case;
|
|
return;
|
|
elsif Chars (Expr) = Name_Mixedcase then
|
|
Cas := Mixed_Case;
|
|
return;
|
|
end if;
|
|
end if;
|
|
|
|
Error_Msg_N
|
|
("Casing argument for pragma% must be " &
|
|
"one of Mixedcase, Lowercase, Uppercase",
|
|
Arg);
|
|
end Process_Casing;
|
|
|
|
-----------------------------
|
|
-- Process_Dot_Replacement --
|
|
-----------------------------
|
|
|
|
procedure Process_Dot_Replacement (Arg : Node_Id) is
|
|
begin
|
|
Check_Required_Identifier (Arg, Name_Dot_Replacement);
|
|
Dot := Get_String_Argument (Arg);
|
|
end Process_Dot_Replacement;
|
|
|
|
-- Start of processing for Source_File_Name and
|
|
-- Source_File_Name_Project pragmas.
|
|
|
|
begin
|
|
if Get_Pragma_Id (Pragma_Name) = Pragma_Source_File_Name then
|
|
if Project_File_In_Use = In_Use then
|
|
Error_Msg
|
|
("pragma Source_File_Name cannot be used " &
|
|
"with a project file", Pragma_Sloc);
|
|
|
|
else
|
|
Project_File_In_Use := Not_In_Use;
|
|
end if;
|
|
|
|
else
|
|
if Project_File_In_Use = Not_In_Use then
|
|
Error_Msg
|
|
("pragma Source_File_Name_Project should only be used " &
|
|
"with a project file", Pragma_Sloc);
|
|
else
|
|
Project_File_In_Use := In_Use;
|
|
end if;
|
|
end if;
|
|
|
|
-- We permit from 1 to 3 arguments
|
|
|
|
if Arg_Count not in 1 .. 3 then
|
|
Check_Arg_Count (1);
|
|
end if;
|
|
|
|
Expr1 := Expression (Arg1);
|
|
|
|
-- If first argument is identifier or selected component, then
|
|
-- we have the specific file case of the Source_File_Name pragma,
|
|
-- and the first argument is a unit name.
|
|
|
|
if Nkind (Expr1) = N_Identifier
|
|
or else
|
|
(Nkind (Expr1) = N_Selected_Component
|
|
and then
|
|
Nkind (Selector_Name (Expr1)) = N_Identifier)
|
|
then
|
|
if Nkind (Expr1) = N_Identifier
|
|
and then Chars (Expr1) = Name_System
|
|
then
|
|
Error_Msg_N
|
|
("pragma Source_File_Name may not be used for System",
|
|
Arg1);
|
|
return Error;
|
|
end if;
|
|
|
|
-- Process index argument if present
|
|
|
|
if Arg_Count = 3 then
|
|
Expr := Expression (Arg3);
|
|
|
|
if Nkind (Expr) /= N_Integer_Literal
|
|
or else not UI_Is_In_Int_Range (Intval (Expr))
|
|
or else Intval (Expr) > 999
|
|
or else Intval (Expr) <= 0
|
|
then
|
|
Error_Msg
|
|
("pragma% index must be integer literal" &
|
|
" in range 1 .. 999", Sloc (Expr));
|
|
raise Error_Resync;
|
|
else
|
|
Index := UI_To_Int (Intval (Expr));
|
|
end if;
|
|
|
|
-- No index argument present
|
|
|
|
else
|
|
Check_Arg_Count (2);
|
|
Index := 0;
|
|
end if;
|
|
|
|
Check_Optional_Identifier (Arg1, Name_Unit_Name);
|
|
Unam := Get_Unit_Name (Expr1);
|
|
|
|
Check_Arg_Is_String_Literal (Arg2);
|
|
|
|
if Chars (Arg2) = Name_Spec_File_Name then
|
|
Set_File_Name
|
|
(Get_Spec_Name (Unam), Get_Fname (Arg2), Index);
|
|
|
|
elsif Chars (Arg2) = Name_Body_File_Name then
|
|
Set_File_Name
|
|
(Unam, Get_Fname (Arg2), Index);
|
|
|
|
else
|
|
Error_Msg_N
|
|
("pragma% argument has incorrect identifier", Arg2);
|
|
return Pragma_Node;
|
|
end if;
|
|
|
|
-- If the first argument is not an identifier, then we must have
|
|
-- the pattern form of the pragma, and the first argument must be
|
|
-- the pattern string with an appropriate name.
|
|
|
|
else
|
|
if Chars (Arg1) = Name_Spec_File_Name then
|
|
Typ := 's';
|
|
|
|
elsif Chars (Arg1) = Name_Body_File_Name then
|
|
Typ := 'b';
|
|
|
|
elsif Chars (Arg1) = Name_Subunit_File_Name then
|
|
Typ := 'u';
|
|
|
|
elsif Chars (Arg1) = Name_Unit_Name then
|
|
Error_Msg_N
|
|
("Unit_Name parameter for pragma% must be an identifier",
|
|
Arg1);
|
|
raise Error_Resync;
|
|
|
|
else
|
|
Error_Msg_N
|
|
("pragma% argument has incorrect identifier", Arg1);
|
|
raise Error_Resync;
|
|
end if;
|
|
|
|
Pat := Get_String_Argument (Arg1);
|
|
|
|
-- Check pattern has exactly one asterisk
|
|
|
|
Nast := 0;
|
|
for J in Pat'Range loop
|
|
if Pat (J) = '*' then
|
|
Nast := Nast + 1;
|
|
end if;
|
|
end loop;
|
|
|
|
if Nast /= 1 then
|
|
Error_Msg_N
|
|
("file name pattern must have exactly one * character",
|
|
Arg1);
|
|
return Pragma_Node;
|
|
end if;
|
|
|
|
-- Set defaults for Casing and Dot_Separator parameters
|
|
|
|
Cas := All_Lower_Case;
|
|
Dot := new String'(".");
|
|
|
|
-- Process second and third arguments if present
|
|
|
|
if Arg_Count > 1 then
|
|
if Chars (Arg2) = Name_Casing then
|
|
Process_Casing (Arg2);
|
|
|
|
if Arg_Count = 3 then
|
|
Process_Dot_Replacement (Arg3);
|
|
end if;
|
|
|
|
else
|
|
Process_Dot_Replacement (Arg2);
|
|
|
|
if Arg_Count = 3 then
|
|
Process_Casing (Arg3);
|
|
end if;
|
|
end if;
|
|
end if;
|
|
|
|
Set_File_Name_Pattern (Pat, Typ, Dot, Cas);
|
|
end if;
|
|
end Source_File_Name;
|
|
|
|
-----------------------------
|
|
-- Source_Reference (GNAT) --
|
|
-----------------------------
|
|
|
|
-- pragma Source_Reference
|
|
-- (INTEGER_LITERAL [, STRING_LITERAL] );
|
|
|
|
-- Processing for this pragma must be done at parse time, since error
|
|
-- messages needing the proper line numbers can be generated in parse
|
|
-- only mode with semantic checking turned off, and indeed we usually
|
|
-- turn off semantic checking anyway if any parse errors are found.
|
|
|
|
when Pragma_Source_Reference => Source_Reference : declare
|
|
Fname : Name_Id;
|
|
|
|
begin
|
|
if Arg_Count /= 1 then
|
|
Check_Arg_Count (2);
|
|
Check_No_Identifier (Arg2);
|
|
end if;
|
|
|
|
-- Check that this is first line of file. We skip this test if
|
|
-- we are in syntax check only mode, since we may be dealing with
|
|
-- multiple compilation units.
|
|
|
|
if Get_Physical_Line_Number (Pragma_Sloc) /= 1
|
|
and then Num_SRef_Pragmas (Current_Source_File) = 0
|
|
and then Operating_Mode /= Check_Syntax
|
|
then
|
|
Error_Msg
|
|
("first % pragma must be first line of file", Pragma_Sloc);
|
|
raise Error_Resync;
|
|
end if;
|
|
|
|
Check_No_Identifier (Arg1);
|
|
|
|
if Arg_Count = 1 then
|
|
if Num_SRef_Pragmas (Current_Source_File) = 0 then
|
|
Error_Msg
|
|
("file name required for first % pragma in file",
|
|
Pragma_Sloc);
|
|
raise Error_Resync;
|
|
else
|
|
Fname := No_Name;
|
|
end if;
|
|
|
|
-- File name present
|
|
|
|
else
|
|
Check_Arg_Is_String_Literal (Arg2);
|
|
String_To_Name_Buffer (Strval (Expression (Arg2)));
|
|
Fname := Name_Find;
|
|
|
|
if Num_SRef_Pragmas (Current_Source_File) > 0 then
|
|
if Fname /= Full_Ref_Name (Current_Source_File) then
|
|
Error_Msg
|
|
("file name must be same in all % pragmas", Pragma_Sloc);
|
|
raise Error_Resync;
|
|
end if;
|
|
end if;
|
|
end if;
|
|
|
|
if Nkind (Expression (Arg1)) /= N_Integer_Literal then
|
|
Error_Msg
|
|
("argument for pragma% must be integer literal",
|
|
Sloc (Expression (Arg1)));
|
|
raise Error_Resync;
|
|
|
|
-- OK, this source reference pragma is effective, however, we
|
|
-- ignore it if it is not in the first unit in the multiple unit
|
|
-- case. This is because the only purpose in this case is to
|
|
-- provide source pragmas for subsequent use by gnatchop.
|
|
|
|
else
|
|
if Num_Library_Units = 1 then
|
|
Register_Source_Ref_Pragma
|
|
(Fname,
|
|
Strip_Directory (Fname),
|
|
UI_To_Int (Intval (Expression (Arg1))),
|
|
Get_Physical_Line_Number (Pragma_Sloc) + 1);
|
|
end if;
|
|
end if;
|
|
end Source_Reference;
|
|
|
|
-------------------------
|
|
-- 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.
|
|
|
|
when Pragma_Style_Checks => Style_Checks : declare
|
|
A : Node_Id;
|
|
S : String_Id;
|
|
C : Char_Code;
|
|
OK : Boolean := True;
|
|
|
|
begin
|
|
-- Two argument case is only for semantics
|
|
|
|
if Arg_Count = 2 then
|
|
null;
|
|
|
|
else
|
|
Check_Arg_Count (1);
|
|
Check_No_Identifier (Arg1);
|
|
A := Expression (Arg1);
|
|
|
|
if Nkind (A) = N_String_Literal then
|
|
S := Strval (A);
|
|
|
|
declare
|
|
Slen : constant Natural := Natural (String_Length (S));
|
|
Options : String (1 .. Slen);
|
|
J : Natural;
|
|
Ptr : Natural;
|
|
|
|
begin
|
|
J := 1;
|
|
loop
|
|
C := Get_String_Char (S, Int (J));
|
|
|
|
if not In_Character_Range (C) then
|
|
OK := False;
|
|
Ptr := J;
|
|
exit;
|
|
|
|
else
|
|
Options (J) := Get_Character (C);
|
|
end if;
|
|
|
|
if J = Slen then
|
|
Set_Style_Check_Options (Options, OK, Ptr);
|
|
exit;
|
|
|
|
else
|
|
J := J + 1;
|
|
end if;
|
|
end loop;
|
|
|
|
if not OK then
|
|
Error_Msg
|
|
(Style_Msg_Buf (1 .. Style_Msg_Len),
|
|
Sloc (Expression (Arg1)) + Source_Ptr (Ptr));
|
|
raise Error_Resync;
|
|
end if;
|
|
end;
|
|
|
|
elsif Nkind (A) /= N_Identifier then
|
|
OK := False;
|
|
|
|
elsif Chars (A) = Name_All_Checks then
|
|
Stylesw.Set_Default_Style_Check_Options;
|
|
|
|
elsif Chars (A) = Name_On then
|
|
Style_Check := True;
|
|
|
|
elsif Chars (A) = Name_Off then
|
|
Style_Check := False;
|
|
|
|
else
|
|
OK := False;
|
|
end if;
|
|
|
|
if not OK then
|
|
Error_Msg ("incorrect argument for pragma%", Sloc (A));
|
|
raise Error_Resync;
|
|
end if;
|
|
end if;
|
|
end Style_Checks;
|
|
|
|
---------------------
|
|
-- Warnings (GNAT) --
|
|
---------------------
|
|
|
|
-- pragma Warnings (On | Off);
|
|
-- pragma Warnings (On | Off, LOCAL_NAME);
|
|
-- pragma Warnings (static_string_EXPRESSION);
|
|
-- pragma Warnings (On | Off, static_string_EXPRESSION);
|
|
|
|
-- The one argument ON/OFF case is processed by the parser, since it may
|
|
-- control parser warnings as well as semantic warnings, and in any case
|
|
-- we want to be absolutely sure that the range in the warnings table is
|
|
-- set well before any semantic analysis is performed.
|
|
|
|
when Pragma_Warnings =>
|
|
if Arg_Count = 1 then
|
|
Check_No_Identifier (Arg1);
|
|
|
|
declare
|
|
Argx : constant Node_Id := Expression (Arg1);
|
|
begin
|
|
if Nkind (Argx) = N_Identifier then
|
|
if Chars (Argx) = Name_On then
|
|
Set_Warnings_Mode_On (Pragma_Sloc);
|
|
elsif Chars (Argx) = Name_Off then
|
|
Set_Warnings_Mode_Off (Pragma_Sloc);
|
|
end if;
|
|
end if;
|
|
end;
|
|
end if;
|
|
|
|
-----------------------------
|
|
-- Wide_Character_Encoding --
|
|
-----------------------------
|
|
|
|
-- pragma Wide_Character_Encoding (IDENTIFIER | CHARACTER_LITERAL);
|
|
|
|
-- This is processed by the parser, since the scanner is affected
|
|
|
|
when Pragma_Wide_Character_Encoding => Wide_Character_Encoding : declare
|
|
A : Node_Id;
|
|
|
|
begin
|
|
Check_Arg_Count (1);
|
|
Check_No_Identifier (Arg1);
|
|
A := Expression (Arg1);
|
|
|
|
if Nkind (A) = N_Identifier then
|
|
Get_Name_String (Chars (A));
|
|
Wide_Character_Encoding_Method :=
|
|
Get_WC_Encoding_Method (Name_Buffer (1 .. Name_Len));
|
|
|
|
elsif Nkind (A) = N_Character_Literal then
|
|
declare
|
|
R : constant Char_Code :=
|
|
Char_Code (UI_To_Int (Char_Literal_Value (A)));
|
|
begin
|
|
if In_Character_Range (R) then
|
|
Wide_Character_Encoding_Method :=
|
|
Get_WC_Encoding_Method (Get_Character (R));
|
|
else
|
|
raise Constraint_Error;
|
|
end if;
|
|
end;
|
|
|
|
else
|
|
raise Constraint_Error;
|
|
end if;
|
|
|
|
exception
|
|
when Constraint_Error =>
|
|
Error_Msg_N ("invalid argument for pragma%", Arg1);
|
|
end Wide_Character_Encoding;
|
|
|
|
-----------------------
|
|
-- All Other Pragmas --
|
|
-----------------------
|
|
|
|
-- For all other pragmas, checking and processing is handled
|
|
-- entirely in Sem_Prag, and no further checking is done by Par.
|
|
|
|
when Pragma_Abort_Defer |
|
|
Pragma_Assertion_Policy |
|
|
Pragma_AST_Entry |
|
|
Pragma_All_Calls_Remote |
|
|
Pragma_Annotate |
|
|
Pragma_Assert |
|
|
Pragma_Asynchronous |
|
|
Pragma_Atomic |
|
|
Pragma_Atomic_Components |
|
|
Pragma_Attach_Handler |
|
|
Pragma_Compile_Time_Warning |
|
|
Pragma_Convention_Identifier |
|
|
Pragma_CPP_Class |
|
|
Pragma_CPP_Constructor |
|
|
Pragma_CPP_Virtual |
|
|
Pragma_CPP_Vtable |
|
|
Pragma_C_Pass_By_Copy |
|
|
Pragma_Comment |
|
|
Pragma_Common_Object |
|
|
Pragma_Complete_Representation |
|
|
Pragma_Complex_Representation |
|
|
Pragma_Component_Alignment |
|
|
Pragma_Controlled |
|
|
Pragma_Convention |
|
|
Pragma_Debug_Policy |
|
|
Pragma_Detect_Blocking |
|
|
Pragma_Discard_Names |
|
|
Pragma_Eliminate |
|
|
Pragma_Elaborate |
|
|
Pragma_Elaborate_All |
|
|
Pragma_Elaborate_Body |
|
|
Pragma_Elaboration_Checks |
|
|
Pragma_Explicit_Overriding |
|
|
Pragma_Export |
|
|
Pragma_Export_Exception |
|
|
Pragma_Export_Function |
|
|
Pragma_Export_Object |
|
|
Pragma_Export_Procedure |
|
|
Pragma_Export_Value |
|
|
Pragma_Export_Valued_Procedure |
|
|
Pragma_Extend_System |
|
|
Pragma_External |
|
|
Pragma_External_Name_Casing |
|
|
Pragma_Finalize_Storage_Only |
|
|
Pragma_Float_Representation |
|
|
Pragma_Ident |
|
|
Pragma_Import |
|
|
Pragma_Import_Exception |
|
|
Pragma_Import_Function |
|
|
Pragma_Import_Object |
|
|
Pragma_Import_Procedure |
|
|
Pragma_Import_Valued_Procedure |
|
|
Pragma_Initialize_Scalars |
|
|
Pragma_Inline |
|
|
Pragma_Inline_Always |
|
|
Pragma_Inline_Generic |
|
|
Pragma_Inspection_Point |
|
|
Pragma_Interface |
|
|
Pragma_Interface_Name |
|
|
Pragma_Interrupt_Handler |
|
|
Pragma_Interrupt_State |
|
|
Pragma_Interrupt_Priority |
|
|
Pragma_Java_Constructor |
|
|
Pragma_Java_Interface |
|
|
Pragma_Keep_Names |
|
|
Pragma_License |
|
|
Pragma_Link_With |
|
|
Pragma_Linker_Alias |
|
|
Pragma_Linker_Constructor |
|
|
Pragma_Linker_Destructor |
|
|
Pragma_Linker_Options |
|
|
Pragma_Linker_Section |
|
|
Pragma_Locking_Policy |
|
|
Pragma_Long_Float |
|
|
Pragma_Machine_Attribute |
|
|
Pragma_Main |
|
|
Pragma_Main_Storage |
|
|
Pragma_Memory_Size |
|
|
Pragma_No_Return |
|
|
Pragma_Obsolescent |
|
|
Pragma_No_Run_Time |
|
|
Pragma_No_Strict_Aliasing |
|
|
Pragma_Normalize_Scalars |
|
|
Pragma_Optimize |
|
|
Pragma_Optional_Overriding |
|
|
Pragma_Pack |
|
|
Pragma_Passive |
|
|
Pragma_Preelaborable_Initialization |
|
|
Pragma_Polling |
|
|
Pragma_Persistent_BSS |
|
|
Pragma_Preelaborate |
|
|
Pragma_Preelaborate_05 |
|
|
Pragma_Priority |
|
|
Pragma_Priority_Specific_Dispatching |
|
|
Pragma_Profile |
|
|
Pragma_Profile_Warnings |
|
|
Pragma_Propagate_Exceptions |
|
|
Pragma_Psect_Object |
|
|
Pragma_Pure |
|
|
Pragma_Pure_05 |
|
|
Pragma_Pure_Function |
|
|
Pragma_Queuing_Policy |
|
|
Pragma_Remote_Call_Interface |
|
|
Pragma_Remote_Types |
|
|
Pragma_Restricted_Run_Time |
|
|
Pragma_Ravenscar |
|
|
Pragma_Reviewable |
|
|
Pragma_Share_Generic |
|
|
Pragma_Shared |
|
|
Pragma_Shared_Passive |
|
|
Pragma_Storage_Size |
|
|
Pragma_Storage_Unit |
|
|
Pragma_Stream_Convert |
|
|
Pragma_Subtitle |
|
|
Pragma_Suppress |
|
|
Pragma_Suppress_All |
|
|
Pragma_Suppress_Debug_Info |
|
|
Pragma_Suppress_Exception_Locations |
|
|
Pragma_Suppress_Initialization |
|
|
Pragma_System_Name |
|
|
Pragma_Task_Dispatching_Policy |
|
|
Pragma_Task_Info |
|
|
Pragma_Task_Name |
|
|
Pragma_Task_Storage |
|
|
Pragma_Thread_Body |
|
|
Pragma_Time_Slice |
|
|
Pragma_Title |
|
|
Pragma_Unchecked_Union |
|
|
Pragma_Unimplemented_Unit |
|
|
Pragma_Universal_Data |
|
|
Pragma_Unreferenced |
|
|
Pragma_Unreserve_All_Interrupts |
|
|
Pragma_Unsuppress |
|
|
Pragma_Use_VADS_Size |
|
|
Pragma_Volatile |
|
|
Pragma_Volatile_Components |
|
|
Pragma_Weak_External |
|
|
Pragma_Validity_Checks =>
|
|
null;
|
|
|
|
--------------------
|
|
-- Unknown_Pragma --
|
|
--------------------
|
|
|
|
-- Should be impossible, since we excluded this case earlier on
|
|
|
|
when Unknown_Pragma =>
|
|
raise Program_Error;
|
|
|
|
end case;
|
|
|
|
return Pragma_Node;
|
|
|
|
--------------------
|
|
-- Error Handling --
|
|
--------------------
|
|
|
|
exception
|
|
when Error_Resync =>
|
|
return Error;
|
|
|
|
end Prag;
|