72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
|
|
// Copyright 2017 Peter Dimov.
|
|
//
|
|
// 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
|
|
|
|
|
|
#include <boost/mp11/algorithm.hpp>
|
|
#include <boost/mp11/list.hpp>
|
|
#include <boost/core/lightweight_test.hpp>
|
|
#include <boost/config.hpp>
|
|
#include <boost/detail/workaround.hpp>
|
|
#include <tuple>
|
|
|
|
#if !defined( BOOST_NO_CXX14_CONSTEXPR )
|
|
# define CONSTEXPR14 constexpr
|
|
#else
|
|
# define CONSTEXPR14
|
|
#endif
|
|
|
|
struct F
|
|
{
|
|
int s;
|
|
|
|
CONSTEXPR14 void operator()( int ) { s = s * 10 + 1; }
|
|
CONSTEXPR14 void operator()( short ) { s = s * 10 + 2; }
|
|
CONSTEXPR14 void operator()( char ) { s = s * 10 + 3; }
|
|
};
|
|
|
|
using boost::mp11::mp_list;
|
|
using boost::mp11::mp_for_each;
|
|
|
|
int main()
|
|
{
|
|
BOOST_TEST_EQ( (mp_for_each<mp_list<>>( 11 )), 11 );
|
|
BOOST_TEST_EQ( (mp_for_each<mp_list<int>>( F{0} ).s), 1 );
|
|
BOOST_TEST_EQ( (mp_for_each<mp_list<int, short>>( F{0} ).s), 12 );
|
|
BOOST_TEST_EQ( (mp_for_each<mp_list<int, short, char>>( F{0} ).s), 123 );
|
|
|
|
BOOST_TEST_EQ( (mp_for_each<std::tuple<>>( 11 )), 11 );
|
|
BOOST_TEST_EQ( (mp_for_each<std::tuple<int>>( F{0} ).s), 1 );
|
|
BOOST_TEST_EQ( (mp_for_each<std::tuple<int, short>>( F{0} ).s), 12 );
|
|
BOOST_TEST_EQ( (mp_for_each<std::tuple<int, short, char>>( F{0} ).s), 123 );
|
|
|
|
BOOST_TEST_EQ( (mp_for_each<std::pair<int, short>>( F{0} ).s), 12 );
|
|
|
|
#if defined( BOOST_NO_CXX11_CONSTEXPR ) || ( defined( _LIBCPP_VERSION ) && __cplusplus < 201400L )
|
|
#else
|
|
|
|
static_assert( mp_for_each<mp_list<>>( 11 ) == 11, "mp_for_each<mp_list<>>( 11 ) == 11" );
|
|
static_assert( mp_for_each<std::tuple<>>( 12 ) == 12, "mp_for_each<std::tuple<>>( 12 ) == 12" );
|
|
|
|
#endif
|
|
|
|
#if !defined( BOOST_NO_CXX14_CONSTEXPR ) && !BOOST_WORKAROUND( BOOST_MSVC, < 1920 )
|
|
|
|
constexpr auto r1 = mp_for_each<mp_list<int, short, char>>( F{0} );
|
|
static_assert( r1.s == 123, "r1.s == 123" );
|
|
|
|
constexpr auto r2 = mp_for_each<std::tuple<int, short, char>>( F{0} );
|
|
static_assert( r2.s == 123, "r2.s == 123" );
|
|
|
|
constexpr auto r3 = mp_for_each<std::pair<int, short>>( F{0} );
|
|
static_assert( r3.s == 12, "r3.s == 12" );
|
|
|
|
#endif
|
|
|
|
return boost::report_errors();
|
|
}
|