gcc/ada/libgnat/g-regpat.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT LIBRARY COMPONENTS                          --
   4 --                                                                          --
   5 --                          G N A T . R E G P A T                           --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --               Copyright (C) 1986 by University of Toronto.               --
  10 --                     Copyright (C) 1996-2023, AdaCore                     --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNAT was originally developed  by the GNAT team at  New York University. --
  29 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This package implements roughly the same set of regular expressions as
  34 --  are available in the Perl or Python programming languages.
  35
  36 --  This is an extension of the original V7 style regular expression library
  37 --  written in C by Henry Spencer. Apart from the translation to Ada, the
  38 --  interface has been considerably changed to use the Ada String type
  39 --  instead of C-style nul-terminated strings.
  40
  41 --  See file s-regpat.ads for full documentation of the interface
  42
  43 ------------------------------------------------------------
  44 -- Summary of Pattern Matching Packages in GNAT Hierarchy --
  45 ------------------------------------------------------------
  46
  47 --  There are three related packages that perform pattern matching functions.
  48 --  the following is an outline of these packages, to help you determine
  49 --  which is best for your needs.
  50
  51 --     GNAT.Regexp (files g-regexp.ads/s-regexp.ads/s-regexp.adb)
  52 --       This is a simple package providing Unix-style regular expression
  53 --       matching with the restriction that it matches entire strings. It
  54 --       is particularly useful for file name matching, and in particular
  55 --       it provides "globbing patterns" that are useful in implementing
  56 --       unix or DOS style wildcard matching for file names.
  57
  58 --     GNAT.Regpat (files g-regpat.ads/s-regpat.ads/s-regpat.adb)
  59 --       This is a more complete implementation of Unix-style regular
  60 --       expressions, copied from the Perl regular expression engine,
  61 --       written originally in C by Henry Spencer. It is functionally the
  62 --       same as that library.
  63
  64 --     GNAT.Spitbol.Patterns (files g-spipat.ads/g-spipat.adb)
  65 --       This is a completely general pattern matching package based on the
  66 --       pattern language of SNOBOL4, as implemented in SPITBOL. The pattern
  67 --       language is modeled on context free grammars, with context sensitive
  68 --       extensions that provide full (type 0) computational capabilities.
  69
  70 with System.Regpat;
  71
  72 package GNAT.Regpat renames System.Regpat;