| |
| #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 |