116 lines
6.6 KiB
Ada
116 lines
6.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S E M _ P R A G --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2008, 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 3, 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 COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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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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-- Pragma handling is isolated in a separate package
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-- (logically this processing belongs in chapter 4)
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with Namet; use Namet;
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with Types; use Types;
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package Sem_Prag is
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-----------------
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-- Subprograms --
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-----------------
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procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id);
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-- Special analyze routine for precondition/postcondition pragma that
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-- appears within a declarative part where the pragma is associated
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-- with a subprogram specification. N is the pragma node, and S is the
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-- entity for the related subprogram. This procedure does a preanalysis
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-- of the expressions in the pragma as "spec expressions" (see section
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-- in Sem "Handling of Default and Per-Object Expressions...").
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procedure Analyze_Pragma (N : Node_Id);
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-- Analyze procedure for pragma reference node N
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function Check_Enabled (Nam : Name_Id) return Boolean;
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-- This function is used in connection with pragmas Assertion, Check,
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-- Precondition, and Postcondition to determine if Check pragmas (or
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-- corresponding Assert, Precondition, or Postcondition pragmas) are
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-- currently active, as determined by the presence of -gnata on the
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-- command line (which sets the default), and the appearance of pragmas
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-- Check_Policy and Assertion_Policy as configuration pragmas either in
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-- a configuration pragma file, or at the start of the current unit.
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-- True is returned if the specified check is enabled.
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function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean;
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-- N is a pragma appearing in a configuration pragma file. Most such
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-- pragmas are analyzed when the file is read, before parsing and analyzing
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-- the main unit. However, the analysis of certain pragmas results in
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-- adding information to the compiled main unit, and this cannot be done
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-- till the main unit is processed. Such pragmas return True from this
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-- function and in Frontend pragmas where Delay_Config_Pragma_Analyze is
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-- True have their analysis delayed until after the main program is parsed
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-- and analyzed.
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procedure Initialize;
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-- Initializes data structures used for pragma processing. Must be called
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-- before analyzing each new main source program.
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function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean;
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-- The node N is a node for an entity and the issue is whether the
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-- occurrence is a reference for the purposes of giving warnings about
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-- unreferenced variables. This function returns True if the reference is
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-- not a reference from this point of view (e.g. the occurrence in a pragma
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-- Pack) and False if it is a real reference (e.g. the occurrence in a
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-- pragma Export);
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function Is_Pragma_String_Literal (Par : Node_Id) return Boolean;
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-- Given an N_Pragma_Argument_Association node, Par, which has the form of
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-- an operator symbol, determines whether or not it should be treated as an
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-- string literal. This is called by Sem_Ch6.Analyze_Operator_Symbol. If
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-- True is returned, the argument is converted to a string literal. If
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-- False is returned, then the argument is treated as an entity reference
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-- to the operator.
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function Is_Config_Static_String (Arg : Node_Id) return Boolean;
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-- This is called for a configuration pragma that requires either string
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-- literal or a concatenation of string literals. We cannot use normal
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-- static string processing because it is too early in the case of the
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-- pragma appearing in a configuration pragmas file. If Arg is of an
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-- appropriate form, then this call obtains the string (doing any necessary
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-- concatenations) and places it in Name_Buffer, setting Name_Len to its
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-- length, and then returns True. If it is not of the correct form, then an
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-- appropriate error message is posted, and False is returned.
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procedure Process_Compilation_Unit_Pragmas (N : Node_Id);
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-- Called at the start of processing compilation unit N to deal with any
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-- special issues regarding pragmas. In particular, we have to deal with
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-- Suppress_All at this stage, since it appears after the unit instead of
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-- before.
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procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id);
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-- This routine is used to set an encoded interface name. The node S is an
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-- N_String_Literal node for the external name to be set, and E is an
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-- entity whose Interface_Name field is to be set. In the normal case where
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-- S contains a name that is a valid C identifier, then S is simply set as
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-- the value of the Interface_Name. Otherwise it is encoded. See the body
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-- for details of the encoding. This encoding is only done on VMS systems,
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-- since it seems pretty silly, but is needed to pass some dubious tests in
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-- the test suite.
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end Sem_Prag;
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