#ifndef BOOST_MPL_AUX_PREPROCESSOR_TOKEN_EQUAL_HPP_INCLUDED | |
#define BOOST_MPL_AUX_PREPROCESSOR_TOKEN_EQUAL_HPP_INCLUDED | |
// Copyright Paul Mensonides 2003 | |
// Copyright Aleksey Gurtovoy 2003-2004 | |
// | |
// 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: token_equal.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ | |
// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ | |
// $Revision: 49267 $ | |
#include <boost/mpl/aux_/preprocessor/is_seq.hpp> | |
#include <boost/preprocessor/if.hpp> | |
#include <boost/preprocessor/logical/bitand.hpp> | |
#include <boost/preprocessor/logical/compl.hpp> | |
#include <boost/preprocessor/tuple/eat.hpp> | |
#include <boost/preprocessor/cat.hpp> | |
// compares tokens 'a' and 'b' for equality: | |
// | |
// #define BOOST_MPL_PP_TOKEN_EQUAL_apple(x) x | |
// #define BOOST_MPL_PP_TOKEN_EQUAL_orange(x) x | |
// | |
// BOOST_PP_ASSERT( BOOST_PP_NOT( BOOST_MPL_PP_TOKEN_EQUAL(apple, abc) ) ) | |
// BOOST_PP_ASSERT( BOOST_PP_NOT( BOOST_MPL_PP_TOKEN_EQUAL(abc, apple) ) ) | |
// BOOST_PP_ASSERT( BOOST_PP_NOT( BOOST_MPL_PP_TOKEN_EQUAL(apple, orange) ) ) | |
// BOOST_PP_ASSERT( BOOST_MPL_PP_TOKEN_EQUAL(apple, apple) ) | |
// BOOST_PP_ASSERT( BOOST_MPL_PP_TOKEN_EQUAL(orange, orange) ) | |
#define BOOST_MPL_PP_TOKEN_EQUAL(a, b) \ | |
BOOST_PP_IIF( \ | |
BOOST_PP_BITAND( \ | |
BOOST_MPL_PP_IS_SEQ( BOOST_PP_CAT(BOOST_MPL_PP_TOKEN_EQUAL_, a)((unused)) ) \ | |
, BOOST_MPL_PP_IS_SEQ( BOOST_PP_CAT(BOOST_MPL_PP_TOKEN_EQUAL_, b)((unused)) ) \ | |
) \ | |
, BOOST_MPL_PP_TOKEN_EQUAL_I \ | |
, 0 BOOST_PP_TUPLE_EAT(2) \ | |
)(a, b) \ | |
/**/ | |
#define BOOST_MPL_PP_TOKEN_EQUAL_I(a, b) \ | |
BOOST_PP_COMPL(BOOST_MPL_PP_IS_SEQ( \ | |
BOOST_MPL_PP_TOKEN_EQUAL_ ## a( \ | |
BOOST_MPL_PP_TOKEN_EQUAL_ ## b \ | |
)((unused)) \ | |
)) \ | |
/**/ | |
#endif // BOOST_MPL_AUX_PREPROCESSOR_TOKEN_EQUAL_HPP_INCLUDED |