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/*
* Copyright Andrey Semashev 2007 - 2015.
* 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)
*/
/*!
* \file bind.hpp
* \author Andrey Semashev
* \date 30.03.2008
*
* This header contains function object adapters.
* This is a lightweight alternative to what Boost.Phoenix and Boost.Bind provides.
*/
#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
#define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
#include <boost/type_traits/remove_cv.hpp>
#include <boost/log/detail/config.hpp>
#include <boost/log/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
BOOST_LOG_OPEN_NAMESPACE
namespace aux {
template< typename T >
struct make_arg_type
{
typedef T const& type;
};
template< typename T >
struct make_arg_type< T& >
{
typedef T& type;
};
} // namespace aux
//! First argument binder
template< typename FunT, typename FirstArgT >
struct binder1st :
private FunT
{
typedef typename FunT::result_type result_type;
binder1st(FunT const& fun, typename aux::make_arg_type< FirstArgT >::type arg) : FunT(fun), m_arg(arg) {}
result_type operator() () const
{
return FunT::operator()(m_arg);
}
template< typename T0 >
result_type operator() (T0 const& arg0) const
{
return FunT::operator()(m_arg, arg0);
}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return FunT::operator()(m_arg, arg0, arg1);
}
private:
FirstArgT m_arg;
};
//! First argument binder
template< typename FunT, typename FirstArgT >
struct binder1st< FunT&, FirstArgT >
{
typedef typename remove_cv< FunT >::type::result_type result_type;
binder1st(FunT& fun, typename aux::make_arg_type< FirstArgT >::type arg) : m_fun(fun), m_arg(arg) {}
result_type operator() () const
{
return m_fun(m_arg);
}
template< typename T0 >
result_type operator() (T0 const& arg0) const
{
return m_fun(m_arg, arg0);
}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return m_fun(m_arg, arg0, arg1);
}
private:
FunT& m_fun;
FirstArgT m_arg;
};
template< typename FunT, typename FirstArgT >
BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT const& arg)
{
return binder1st< FunT, FirstArgT >(fun, arg);
}
template< typename FunT, typename FirstArgT >
BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT& arg)
{
return binder1st< FunT, FirstArgT >(fun, arg);
}
//! Second argument binder
template< typename FunT, typename SecondArgT >
struct binder2nd :
private FunT
{
typedef typename FunT::result_type result_type;
binder2nd(FunT const& fun, typename aux::make_arg_type< SecondArgT >::type arg) : FunT(fun), m_arg(arg) {}
template< typename T >
result_type operator() (T const& arg) const
{
return FunT::operator()(arg, m_arg);
}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return FunT::operator()(arg0, m_arg, arg1);
}
private:
SecondArgT m_arg;
};
//! Second argument binder
template< typename FunT, typename SecondArgT >
struct binder2nd< FunT&, SecondArgT >
{
typedef typename remove_cv< FunT >::type::result_type result_type;
binder2nd(FunT& fun, typename aux::make_arg_type< SecondArgT >::type arg) : m_fun(fun), m_arg(arg) {}
template< typename T >
result_type operator() (T const& arg) const
{
return m_fun(arg, m_arg);
}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return m_fun(arg0, m_arg, arg1);
}
private:
FunT& m_fun;
SecondArgT m_arg;
};
template< typename FunT, typename SecondArgT >
BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT const& arg)
{
return binder2nd< FunT, SecondArgT >(fun, arg);
}
template< typename FunT, typename SecondArgT >
BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT& arg)
{
return binder2nd< FunT, SecondArgT >(fun, arg);
}
//! Third argument binder
template< typename FunT, typename ThirdArgT >
struct binder3rd :
private FunT
{
typedef typename FunT::result_type result_type;
binder3rd(FunT const& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : FunT(fun), m_arg(arg) {}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return FunT::operator()(arg0, arg1, m_arg);
}
private:
ThirdArgT m_arg;
};
//! Third argument binder
template< typename FunT, typename ThirdArgT >
struct binder3rd< FunT&, ThirdArgT >
{
typedef typename remove_cv< FunT >::type::result_type result_type;
binder3rd(FunT& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : m_fun(fun), m_arg(arg) {}
template< typename T0, typename T1 >
result_type operator() (T0 const& arg0, T1 const& arg1) const
{
return m_fun(arg0, arg1, m_arg);
}
private:
FunT& m_fun;
ThirdArgT m_arg;
};
template< typename FunT, typename ThirdArgT >
BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT const& arg)
{
return binder3rd< FunT, ThirdArgT >(fun, arg);
}
template< typename FunT, typename ThirdArgT >
BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT& arg)
{
return binder3rd< FunT, ThirdArgT >(fun, arg);
}
BOOST_LOG_CLOSE_NAMESPACE // namespace log
} // namespace boost
#include <boost/log/detail/footer.hpp>
#endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_
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