ext-boost/boost/move/algo/predicate.hpp
2019-08-24 15:39:04 +02:00

102 lines
2 KiB
C++

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2015-2016.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/move for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_MOVE_ALGO_PREDICATE_HPP
#define BOOST_MOVE_ALGO_PREDICATE_HPP
#include <boost/move/algo/move.hpp>
#include <boost/move/adl_move_swap.hpp>
#include <boost/move/algo/detail/basic_op.hpp>
#include <boost/move/detail/iterator_traits.hpp>
#include <boost/move/detail/destruct_n.hpp>
#include <boost/assert.hpp>
namespace boost {
namespace movelib {
template<class Comp>
struct antistable
{
explicit antistable(Comp &comp)
: m_comp(comp)
{}
antistable(const antistable & other)
: m_comp(other.m_comp)
{}
template<class U, class V>
bool operator()(const U &u, const V & v)
{ return !m_comp(v, u); }
const Comp &get() const
{ return m_comp; }
private:
antistable & operator=(const antistable &);
Comp &m_comp;
};
template<class Comp>
Comp unantistable(Comp comp)
{ return comp; }
template<class Comp>
Comp unantistable(antistable<Comp> comp)
{ return comp.get(); }
template <class Comp>
class negate
{
public:
negate()
{}
explicit negate(Comp comp)
: m_comp(comp)
{}
template <class T1, class T2>
bool operator()(const T1& l, const T2& r)
{
return !m_comp(l, r);
}
private:
Comp m_comp;
};
template <class Comp>
class inverse
{
public:
inverse()
{}
explicit inverse(Comp comp)
: m_comp(comp)
{}
template <class T1, class T2>
bool operator()(const T1& l, const T2& r)
{
return m_comp(r, l);
}
private:
Comp m_comp;
};
} //namespace movelib {
} //namespace boost {
#endif //#define BOOST_MOVE_ALGO_PREDICATE_HPP