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// Default predicates for internal use -*- C++ -*-
// Copyright (C) 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
// any later version.
// This library 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 library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/** @file predefined_ops.h
* This is an internal header file, included by other library headers.
* You should not attempt to use it directly.
*/
#ifndef _GLIBCXX_PREDEFINED_OPS_H
#define _GLIBCXX_PREDEFINED_OPS_H 1
namespace __gnu_cxx
{
namespace __ops
{
template<typename _Lhs, typename _Rhs = _Lhs>
struct less
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs < __rhs; }
bool
operator()(const _Lhs& __lhs, const _Rhs& __rhs) const
{ return __lhs < __rhs; }
bool
operator()(const _Rhs& __lhs, const _Lhs& __rhs) const
{ return __lhs < __rhs; }
bool
operator()(const _Rhs& __lhs, const _Rhs& __rhs) const
{ return __lhs < __rhs; }
};
template<typename _Lhs>
struct less<_Lhs, _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs < __rhs; }
};
template<typename _Lhs>
struct less<_Lhs, const _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs < __rhs; }
};
template<typename _Lhs>
struct less<const _Lhs, _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs < __rhs; }
};
template<typename _Lhs, typename _Rhs = _Lhs>
struct equal_to
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs == __rhs; }
bool
operator()(const _Lhs& __lhs, const _Rhs& __rhs) const
{ return __lhs == __rhs; }
bool
operator()(const _Rhs& __lhs, const _Lhs& __rhs) const
{ return __lhs == __rhs; }
bool
operator()(const _Rhs& __lhs, const _Rhs& __rhs) const
{ return __lhs == __rhs; }
};
template<typename _Lhs>
struct equal_to<_Lhs, _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs == __rhs; }
};
template<typename _Lhs>
struct equal_to<_Lhs, const _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs == __rhs; }
};
template<typename _Lhs>
struct equal_to<const _Lhs, _Lhs>
{
bool
operator()(const _Lhs& __lhs, const _Lhs& __rhs) const
{ return __lhs == __rhs; }
};
/**
* @if maint
* A class inspired by bind2nd and company, which wraps a function or
* class and a reference, and produces a unary function object. It has less
* requirements than the standard version and is designed to be use to wrap
* binary predicates given to algorithms in the standard library.
* @endif
*/
template<typename _Lhs, typename _Value, typename _Comp>
class __bind2nd
{
const _Value& _M_value;
_Comp _M_comp;
public:
explicit
__bind2nd(const _Value& __inval, _Comp __comp)
: _M_value(__inval), _M_comp(__comp) {}
bool
operator()(const _Lhs& __lhs)
{ return _M_comp(__lhs, _M_value); }
};
/**
* @if maint
* Specialisation of __bind2nd for equality.
* @endif
*/
template<typename _Lhs, typename _Value>
class __bind2nd<_Lhs, _Value, __gnu_cxx::__ops::equal_to<_Lhs, _Value> >
{
const _Value& _M_value;
public:
explicit
__bind2nd(const _Value& __inval,
__gnu_cxx::__ops::equal_to<_Lhs, _Value>)
: _M_value(__inval) {}
bool
operator()(const _Lhs& __lhs)
{ return __lhs == _M_value; }
};
template<typename _Lhs, typename _Value, typename _Comp>
inline __bind2nd<_Lhs, _Value, _Comp>
bind2nd(const _Value& __value, _Comp __comp)
{ return __bind2nd<_Lhs, _Value, _Comp>(__value, __comp); }
} // namespace __ops
} // namespace __gnu_cxx
#endif
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