gcc/ada/fname-sf.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             F N A M E . S F                              --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2001 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 --  This child package contains a routine to read and process Source_File_Name
  28 --  pragmas from the gnat.adc file in the current directory. In order to use
  29 --  the routines in package Fname.UF, it is required that Source_File_Name
  30 --  pragmas be processed. There are two places where such processing takes
  31 --  place:
  32
  33 --    The compiler front end (par-prag.adb), which is the general circuit
  34 --    for processing all pragmas, including Source_File_Name.
  35
  36 --    The stand alone routine in this unit, which is convenient to use
  37 --    from tools that do not want to include the compiler front end.
  38
  39 --  Note that this unit does depend on several of the compiler front-end
  40 --  sources, including osint. If it is necessary to scan source file name
  41 --  pragmas with less dependence on such sources, look at unit SFN_Scan.
  42
  43 package Fname.SF is
  44
  45    procedure Read_Source_File_Name_Pragmas;
  46    --  This procedure is called to read the gnat.adc file and process any
  47    --  Source_File_Name pragmas contained in this file. All other pragmas
  48    --  are ignored. The result is appropriate calls to routines in the
  49    --  package Fname.UF to register the pragmas so that subsequent calls
  50    --  to Get_File_Name work correctly.
  51    --
  52    --  Note: The caller must have made an appropriate call to the
  53    --  Osint.Initialize routine to initialize Osint before calling
  54    --  this procedure.
  55    --
  56    --  If a syntax error is detected while scanning the gnat.adc file,
  57    --  then the exception SFN_Scan.Syntax_Error_In_GNAT_ADC is raised
  58    --  and SFN_Scan.Cursor contains the approximate index relative to
  59    --  the start of the gnat.adc file of the error.
  60
  61 end Fname.SF;