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Diffstat (limited to '3rdParty/Boost/src/boost/proto/detail/remove_typename.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/proto/detail/remove_typename.hpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/proto/detail/remove_typename.hpp b/3rdParty/Boost/src/boost/proto/detail/remove_typename.hpp new file mode 100644 index 0000000..fdbe98e --- /dev/null +++ b/3rdParty/Boost/src/boost/proto/detail/remove_typename.hpp @@ -0,0 +1,82 @@ +//============================================================================== +// Copyright 2003 - 2011 LASMEA UMR 6602 CNRS/Univ. Clermont II +// Copyright 2009 - 2011 LRI UMR 8623 CNRS/Univ Paris Sud XI +// Copyright 2011 Eric Niebler +// +// Distributed under the Boost Software License, Version 1.0. +// See accompanying file LICENSE.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt +//============================================================================== +#ifndef BOOST_PROTO_PREPROCESSOR_REMOVE_TYPENAME_HPP_INCLUDED +#define BOOST_PROTO_PREPROCESSOR_REMOVE_TYPENAME_HPP_INCLUDED + +/*! + * \file + * \brief Defines the BOOST_PROTO_REMOVE_TYPENAME macro + */ +#include <boost/preprocessor/cat.hpp> +#include <boost/preprocessor/expand.hpp> +#include <boost/preprocessor/tuple/eat.hpp> +#include <boost/preprocessor/control/iif.hpp> +#include <boost/preprocessor/detail/is_unary.hpp> + +//============================================================================== +// Boost.Preprocessor author P. Mensodines confirmed on an Boost email thread +// (subject ``check if a token is a keyword (was "BOOST_PP_IS_UNARY()")'') +// that it is OK to used `PP_IS_UNARY()` to check if tokens match predefined +// "keyword" as it is done by the macros below (even if `PP_IS_UNARY()` is +// technically only part of Boost.Preprocessor private API). +//============================================================================== + +//============================================================================== +// `checking_prefix ## tokens` expand to unary (e.g., `(1)`) iff `tokens` start +// with keyword to check. +//============================================================================== +#define BOOST_PROTO_DETAILS_KEYWORD_FACILITY_IS_FRONT(T, CHECKING_PREFIX) \ + BOOST_PP_IS_UNARY(BOOST_PP_CAT(CHECKING_PREFIX, T)) \ + /**/ + +//============================================================================== +// `is_front_macro(tokens)` is 1 iff `tokens` start with keyword to remove. +// `removing_prefix ## <keyword-to-remove>` must expand to nothing. +//============================================================================== +#define BOOST_PROTO_DETAILS_KEYWORD_FACILITY_REMOVE_FRONT(TOKENS, IS_FRONT_MACRO, REMOVING_PREFIX) \ + BOOST_PP_EXPAND( /* without EXPAND doesn't expand on MSVC */ \ + BOOST_PP_IIF( \ + IS_FRONT_MACRO(TOKENS) \ + , BOOST_PP_CAT \ + , TOKENS BOOST_PP_TUPLE_EAT(2) \ + )(REMOVING_PREFIX, TOKENS) \ + ) \ + /**/ + +#define BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_IS_typename (1) /* unary */ +#define typename_BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_IS (1) /* unary */ +#define BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_REMOVE_typename /* nothing */ +#define typename_BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_REMOVE /* nothing */ + +#define BOOST_PROTO_DETAILS_KEYWORD_IS_TYPENAME_FRONT(TOKENS) \ + BOOST_PROTO_DETAILS_KEYWORD_FACILITY_IS_FRONT(TOKENS, BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_IS_) \ + /**/ + +//============================================================================== +/*! + * \ingroup preprocessor + * For any symbol \c X, this macro returns the same symbol from which a potential + * leading \c typename keyword has been removed. If no typename keyword is present, + * this macros evaluates to \c X itself without error. + * + * The original implementation of this macro is from Lorenzo Caminiti. + * + * \param X Symbol to remove \c typename from + */ +//============================================================================== +#define BOOST_PROTO_REMOVE_TYPENAME(X) \ + BOOST_PROTO_DETAILS_KEYWORD_FACILITY_REMOVE_FRONT( \ + X \ + , BOOST_PROTO_DETAILS_KEYWORD_IS_TYPENAME_FRONT \ + , BOOST_PROTO_DETAILS_KEYWORD_TYPENAME_REMOVE_ \ + ) \ + /**/ + +#endif |