------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G N A T . R E G E X P -- -- -- -- S p e c -- -- -- -- Copyright (C) 1998-2019, 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 -- -- . -- -- -- -- 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 wildcard 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;