gcc/ada/sem_prag.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             S E M _ P R A G                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2004 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  Pragma handling is isolated in a separate package
  28 --  (logically this processing belongs in chapter 4)
  29
  30 with Types; use Types;
  31 package Sem_Prag is
  32
  33    procedure Analyze_Pragma (N : Node_Id);
  34    --  Analyze procedure for pragma reference node N
  35
  36    function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean;
  37    --  N is a pragma appearing in a configuration pragma file. Most
  38    --  such pragmas are analyzed when the file is read, before parsing
  39    --  and analyzing the main unit. However, the analysis of certain
  40    --  pragmas results in adding information to the compiled main unit,
  41    --  and this cannot be done till the main unit is processed. Such
  42    --  pragmas return True from this function and in Frontend pragmas
  43    --  where Delay_Config_Pragma_Analyze is True have their analysis
  44    --  delayed until after the main program is parsed and analyzed.
  45
  46    function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean;
  47    --  The node N is a node for an entity and the issue is whether the
  48    --  occurrence is a reference for the purposes of giving warnings
  49    --  about unreferenced variables. This function returns True if the
  50    --  reference is not a reference from this point of view (e.g. the
  51    --  occurrence in a pragma Pack) and False if it is a real reference
  52    --  (e.g. the occcurrence in a pragma Export);
  53
  54    function Is_Pragma_String_Literal (Par : Node_Id) return Boolean;
  55    --  Given an N_Pragma_Argument_Association node, Par, which has the form
  56    --  of an operator symbol, determines whether or not it should be treated
  57    --  as an string literal. This is called by Sem_Ch6.Analyze_Operator_Symbol.
  58    --  If True is returned, the argument is converted to a string literal. If
  59    --  False is returned, then the argument is treated as an entity reference
  60    --  to the operator.
  61
  62    function Is_Config_Static_String (Arg : Node_Id) return Boolean;
  63    --  This is called for a configuration pragma that requires either a
  64    --  string literal or a concatenation of string literals. We cannot
  65    --  use normal static string processing because it is too early in
  66    --  the case of the pragma appearing in a configuration pragmas file.
  67    --  If Arg is of an appropriate form, then this call obtains the string
  68    --  (doing any necessary concatenations) and places it in Name_Buffer,
  69    --  setting Name_Len to its length, and then returns True. If it is
  70    --  not of the correct form, then an appropriate error message is
  71    --  posted, and False is returned.
  72
  73    procedure Process_Compilation_Unit_Pragmas (N : Node_Id);
  74    --  Called at the start of processing compilation unit N to deal with
  75    --  any special issues regarding pragmas. In particular, we have to
  76    --  deal with Suppress_All at this stage, since it appears after the
  77    --  unit instead of before.
  78
  79    procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id);
  80    --  This routine is used to set an encoded interface name. The node
  81    --  S is an N_String_Literal node for the external name to be set, and
  82    --  E is an entity whose Interface_Name field is to be set. In the
  83    --  normal case where S contains a name that is a valid C identifier,
  84    --  then S is simply set as the value of the Interface_Name. Otherwise
  85    --  it is encoded. See the body for details of the encoding. This
  86    --  encoding is only done on VMS systems, since it seems pretty silly,
  87    --  but is needed to pass some dubious tests in the test suite.
  88
  89 end Sem_Prag;