gcc/ada/switch.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                               S W I T C H                                --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.17 $                             --
  10 --                                                                          --
  11 --          Copyright (C) 1992-2001 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- GNAT was originally developed  by the GNAT team at  New York University. --
  25 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  26 --                                                                          --
  27 ------------------------------------------------------------------------------
  28
  29 --  This package scans switches. Note that the body of Usage must be
  30 --  coordinated with the switches that are recognized by this package.
  31 --  The Usage package also acts as the official documentation for the
  32 --  switches that are recognized. In addition, package Debug documents
  33 --  the otherwise undocumented debug switches that are also recognized.
  34
  35 package Switch is
  36
  37    --  Note: The default switch character is indicated by Switch_Character,
  38    --  but regardless of what it is, a hyphen is always allowed as an
  39    --  (alternative) switch character.
  40
  41    --  Note: In GNAT, the case of switches is not significant if
  42    --  Switches_Case_Sensitive is False. If this is the case, switch
  43    --  characters, or letters appearing in the parameter to a switch, may be
  44    --  either upper case or lower case.
  45
  46    -----------------
  47    -- Subprograms --
  48    -----------------
  49
  50    function Is_Switch (Switch_Chars : String) return Boolean;
  51    --  Returns True iff Switch_Chars is at least two characters long,
  52    --  and the first character indicates it is a switch.
  53
  54    function Is_Front_End_Switch (Switch_Chars : String) return Boolean;
  55    --  Returns True iff Switch_Chars represents a front-end switch,
  56    --  ie. it starts with -I or -gnat.
  57
  58    procedure Scan_Front_End_Switches (Switch_Chars : String);
  59    procedure Scan_Binder_Switches (Switch_Chars : String);
  60    procedure Scan_Make_Switches (Switch_Chars : String);
  61    --  Procedures to scan out switches stored in the given string. The first
  62    --  character is known to be a valid switch character, and there are no
  63    --  blanks or other switch terminator characters in the string, so the
  64    --  entire string should consist of valid switch characters, except that
  65    --  an optional terminating NUL character is allowed. A bad switch causes
  66    --  a fatal error exit and control does not return. The call also sets
  67    --  Usage_Requested to True if a ? switch is encountered.
  68
  69 end Switch;