bind.cpp

来自「Boost provides free peer-reviewed portab」· C++ 代码 · 共 90 行

// Copyright Peter Dimov 2001-2002
// Copyright Aleksey Gurtovoy 2001-2004
//
// 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/mpl for documentation.

// $Id: bind.cpp 49268 2008-10-11 06:26:17Z agurtovoy $
// $Date: 2008-10-11 02:26:17 -0400 (Sat, 11 Oct 2008) $
// $Revision: 49268 $

#include <boost/mpl/bind.hpp>
#include <boost/mpl/quote.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/next.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/apply_wrap.hpp>
#include <boost/mpl/aux_/test.hpp>

#include <boost/type_traits/is_float.hpp>

namespace {

struct f1
{
    template< typename T1 > struct apply
    {
        typedef T1 type;
    };
};

struct f5
{
    template< typename T1, typename T2, typename T3, typename T4, typename T5 >
    struct apply
    {
        typedef T5 type;
    };
};

} // namespace

MPL_TEST_CASE() // basic argument binding
{
    typedef apply_wrap1< bind1<f1,_1>, int >::type r11;
    typedef apply_wrap5< bind1<f1,_5>, void,void,void,void,int >::type r12;
    MPL_ASSERT(( boost::is_same<r11,int> ));
    MPL_ASSERT(( boost::is_same<r12,int> ));
    
    typedef apply_wrap5< bind5<f5,_1,_2,_3,_4,_5>, void,void,void,void,int >::type r51;
    typedef apply_wrap5< bind5<f5,_5,_4,_3,_2,_1>, int,void,void,void,void >::type r52;
    MPL_ASSERT(( boost::is_same<r51,int> ));
    MPL_ASSERT(( boost::is_same<r52,int> ));
}


MPL_TEST_CASE() // fully bound metafunction classes
{
    typedef apply_wrap0< bind1<f1,int> >::type r11;
    typedef apply_wrap0< bind5<f5,void,void,void,void,int> >::type r51;
    MPL_ASSERT(( boost::is_same<r11,int> ));
    MPL_ASSERT(( boost::is_same<r51,int> ));
}


MPL_TEST_CASE() // metafunction class composition
{
    typedef apply_wrap5< bind5<f5,_1,_2,_3,_4,bind1<f1,_1> >, int,void,void,void,void >::type r51;
    typedef apply_wrap5< bind5<f5,_1,_2,_3,_4,bind1<f1,_5> >, void,void,void,void,int >::type r52;
    MPL_ASSERT(( boost::is_same<r51,int> ));
    MPL_ASSERT(( boost::is_same<r52,int> ));
}

#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
    && !defined(BOOST_MPL_CFG_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
    && !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
MPL_TEST_CASE() // if_ evaluation
{
    typedef bind3< quote3<if_>, _1, bind1< quote1<next>, _2>, _3 > f;
    typedef apply_wrap3< f,true_,int_<0>,int >::type r1;
    typedef apply_wrap3< f,false_,int,int_<0> >::type r2;
    
    MPL_ASSERT(( boost::is_same<r1,int_<1> > ));
    MPL_ASSERT(( boost::is_same<r2,int_<0> > ));
}
#endif