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/*
** SWISH++
** stem_word.h
**
** Copyright (C) 1998 Paul J. Lucas
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef stem_word_H
#define stem_word_H
// local
#include "less.h"
//*****************************************************************************
//
// SYNOPSIS
//
struct less_stem : std::less< char const* >
//
// DESCRIPTION
//
// A less_stem is-a less< char const* > that compares C-style strings but
// possibly stems (suffix strips) the words before comparison.
//
//*****************************************************************************
{
less_stem( bool stem ) : stem_func_( stem ? stem_word : no_stem ) { }
result_type
operator()( first_argument_type a, second_argument_type b ) const {
return std::strcmp( stem_func_( a ), stem_func_( b ) ) < 0;
}
private:
char const* (*const stem_func_)( char const *word );
static char const* no_stem( char const *word ) { return word; }
static char const* stem_word( char const *word );
};
#endif /* stem_word_H */
/* vim:set noet sw=8 ts=8: */
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