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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- G N A T . R E G E X P --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1998-2010, AdaCore --
+-- --
+-- 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- Simple Regular expression matching
+
+-- This package provides a simple implementation of a regular expression
+-- pattern matching algorithm, using a subset of the syntax of regular
+-- expressions copied from familiar Unix style utilities.
+
+-- See file s-regexp.ads for full documentation of the interface
+
+------------------------------------------------------------
+-- Summary of Pattern Matching Packages in GNAT Hierarchy --
+------------------------------------------------------------
+
+-- There are three related packages that perform pattern matching functions.
+-- the following is an outline of these packages, to help you determine
+-- which is best for your needs.
+
+-- GNAT.Regexp (files g-regexp.ads/s-regexp.ads/s-regexp.adb)
+-- This is a simple package providing Unix-style regular expression
+-- matching with the restriction that it matches entire strings. It
+-- is particularly useful for file name matching, and in particular
+-- it provides "globbing patterns" that are useful in implementing
+-- unix or DOS style wild card matching for file names.
+
+-- GNAT.Regpat (files g-regpat.ads/s-regpat.ads/g-regpat.adb)
+-- This is a more complete implementation of Unix-style regular
+-- expressions, copied from the original V7 style regular expression
+-- library written in C by Henry Spencer. It is functionally the
+-- same as this library, and uses the same internal data structures
+-- stored in a binary compatible manner.
+
+-- GNAT.Spitbol.Patterns (files g-spipat.ads/g-spipat.adb)
+-- This is a completely general pattern matching package based on the
+-- pattern language of SNOBOL4, as implemented in SPITBOL. The pattern
+-- language is modeled on context free grammars, with context sensitive
+-- extensions that provide full (type 0) computational capabilities.
+
+with System.Regexp;
+
+package GNAT.Regexp renames System.Regexp;