replace_if.cpp

来自「boost库提供标准的C++ API 配合dev c++使用,功能更加强大」· C++ 代码 · 共 38 行

//-----------------------------------------------------------------------------
// boost mpl/test/replace_if.cpp source file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2000-02
// Aleksey Gurtovoy and John R. Bandela
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee, 
// provided that the above copyright notice appears in all copies and 
// that both the copyright notice and this permission notice appear in 
// supporting documentation. No representations are made about the 
// suitability of this software for any purpose. It is provided "as is" 
// without express or implied warranty.

#include "boost/mpl/replace_if.hpp"
#include "boost/mpl/list_c.hpp"
#include "boost/mpl/int.hpp"
#include "boost/mpl/equal.hpp"
#include "boost/mpl/greater.hpp"
#include "boost/mpl/equal_to.hpp"
#include "boost/static_assert.hpp"

namespace mpl = boost::mpl;

int main()
{
    using namespace mpl::placeholders;
    typedef mpl::list_c<int,1,4,5,2,7,5,3,5>::type numbers;
    typedef mpl::replace_if< numbers, mpl::gt<4>, mpl::int_<0> >::type result;

    typedef mpl::list_c<int,1,4,0,2,0,0,3,0>::type answer;
    BOOST_STATIC_ASSERT((mpl::equal< answer,result,mpl::equal_to<_,_> >::type::value));

    return 0;
}