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