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- // Copyright Daniel Wallin 2006.
- // Copyright Cromwell D. Enage 2017.
- // 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)
- #ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_QUALIFIER_HPP
- #define BOOST_PARAMETER_AUX_PREPROCESSOR_QUALIFIER_HPP
- #define BOOST_PARAMETER_QUALIFIER_EAT_in(x)
- #define BOOST_PARAMETER_QUALIFIER_EAT_out(x)
- #define BOOST_PARAMETER_QUALIFIER_EAT_in_out(x)
- #define BOOST_PARAMETER_QUALIFIER_EAT_consume(x)
- #define BOOST_PARAMETER_QUALIFIER_EAT_move_from(x)
- #define BOOST_PARAMETER_QUALIFIER_EAT_forward(x)
- #define BOOST_PARAMETER_GET_QUALIFIER_in(x) in_reference
- #define BOOST_PARAMETER_GET_QUALIFIER_out(x) out_reference
- #define BOOST_PARAMETER_GET_QUALIFIER_in_out(x) in_out_reference
- #define BOOST_PARAMETER_GET_QUALIFIER_consume(x) consume_reference
- #define BOOST_PARAMETER_GET_QUALIFIER_move_from(x) move_from_reference
- #define BOOST_PARAMETER_GET_QUALIFIER_forward(x) forward_reference
- #define BOOST_PARAMETER_STRIP_QUALIFIER_in(x) x
- #define BOOST_PARAMETER_STRIP_QUALIFIER_out(x) x
- #define BOOST_PARAMETER_STRIP_QUALIFIER_in_out(x) x
- #define BOOST_PARAMETER_STRIP_QUALIFIER_consume(x) x
- #define BOOST_PARAMETER_STRIP_QUALIFIER_move_from(x) x
- #define BOOST_PARAMETER_STRIP_QUALIFIER_forward(x) x
- #include <boost/preprocessor/cat.hpp>
- #define BOOST_PARAMETER_GET_QUALIFIER_GET(x) \
- BOOST_PP_CAT(BOOST_PARAMETER_GET_QUALIFIER_, x)
- /**/
- #define BOOST_PARAMETER_GET_UNQUALIFIED(x) \
- BOOST_PP_CAT(BOOST_PARAMETER_STRIP_QUALIFIER_, x)
- /**/
- #include <boost/preprocessor/facilities/is_empty.hpp>
- // Expands to 1 if x is either "in(k)", "out(k)", "in_out(k)", "consume(k)",
- // "move_from(k)", or "forward(k)"; expands to 0 otherwise.
- #define BOOST_PARAMETER_IS_QUALIFIER(x) \
- BOOST_PP_IS_EMPTY(BOOST_PP_CAT(BOOST_PARAMETER_QUALIFIER_EAT_, x))
- /**/
- #include <boost/preprocessor/control/iif.hpp>
- // Expands to the qualifier of x,
- // where x is either a keyword qualifier or a keyword.
- //
- // k => forward_reference
- // in(k) => in_reference
- // out(k) => out_reference
- // in_out(k) => in_out_reference
- // forward(k) => forward_reference
- // consume(k) => consume_reference
- // move_from(k) => move_from_reference
- #define BOOST_PARAMETER_GET_QUALIFIER(x) \
- BOOST_PP_IIF( \
- BOOST_PARAMETER_IS_QUALIFIER(x) \
- , BOOST_PARAMETER_GET_QUALIFIER_GET(x) \
- , forward_reference \
- )
- /**/
- // Expands to the unqualified version of x,
- // where x is either a keyword qualifier or a keyword.
- //
- // k => k
- // in(k) => k
- // out(k) => k
- // in_out(k) => k
- // forward(k) => k
- // consume(k) => k
- // move_from(k) => k
- #define BOOST_PARAMETER_UNQUALIFIED(x) \
- BOOST_PP_IIF( \
- BOOST_PARAMETER_IS_QUALIFIER(x) \
- , BOOST_PARAMETER_GET_UNQUALIFIED(x) \
- , x \
- )
- /**/
- #endif // include guard
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