// Copyright Daniel Wallin 2006.
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// Copyright Cromwell D. Enage 2017.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_QUALIFIER_HPP
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#define BOOST_PARAMETER_AUX_PREPROCESSOR_QUALIFIER_HPP
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#define BOOST_PARAMETER_QUALIFIER_EAT_in(x)
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#define BOOST_PARAMETER_QUALIFIER_EAT_out(x)
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#define BOOST_PARAMETER_QUALIFIER_EAT_in_out(x)
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#define BOOST_PARAMETER_QUALIFIER_EAT_consume(x)
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#define BOOST_PARAMETER_QUALIFIER_EAT_move_from(x)
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#define BOOST_PARAMETER_QUALIFIER_EAT_forward(x)
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#define BOOST_PARAMETER_GET_QUALIFIER_in(x) in_reference
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#define BOOST_PARAMETER_GET_QUALIFIER_out(x) out_reference
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#define BOOST_PARAMETER_GET_QUALIFIER_in_out(x) in_out_reference
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#define BOOST_PARAMETER_GET_QUALIFIER_consume(x) consume_reference
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#define BOOST_PARAMETER_GET_QUALIFIER_move_from(x) move_from_reference
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#define BOOST_PARAMETER_GET_QUALIFIER_forward(x) forward_reference
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#define BOOST_PARAMETER_STRIP_QUALIFIER_in(x) x
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#define BOOST_PARAMETER_STRIP_QUALIFIER_out(x) x
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#define BOOST_PARAMETER_STRIP_QUALIFIER_in_out(x) x
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#define BOOST_PARAMETER_STRIP_QUALIFIER_consume(x) x
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#define BOOST_PARAMETER_STRIP_QUALIFIER_move_from(x) x
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#define BOOST_PARAMETER_STRIP_QUALIFIER_forward(x) x
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#include <boost/preprocessor/cat.hpp>
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#define BOOST_PARAMETER_GET_QUALIFIER_GET(x) \
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BOOST_PP_CAT(BOOST_PARAMETER_GET_QUALIFIER_, x)
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/**/
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#define BOOST_PARAMETER_GET_UNQUALIFIED(x) \
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BOOST_PP_CAT(BOOST_PARAMETER_STRIP_QUALIFIER_, x)
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/**/
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#include <boost/preprocessor/facilities/is_empty.hpp>
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// Expands to 1 if x is either "in(k)", "out(k)", "in_out(k)", "consume(k)",
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// "move_from(k)", or "forward(k)"; expands to 0 otherwise.
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#define BOOST_PARAMETER_IS_QUALIFIER(x) \
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BOOST_PP_IS_EMPTY(BOOST_PP_CAT(BOOST_PARAMETER_QUALIFIER_EAT_, x))
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/**/
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#include <boost/preprocessor/control/iif.hpp>
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// Expands to the qualifier of x,
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// where x is either a keyword qualifier or a keyword.
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//
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// k => forward_reference
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// in(k) => in_reference
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// out(k) => out_reference
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// in_out(k) => in_out_reference
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// forward(k) => forward_reference
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// consume(k) => consume_reference
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// move_from(k) => move_from_reference
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#define BOOST_PARAMETER_GET_QUALIFIER(x) \
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BOOST_PP_IIF( \
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BOOST_PARAMETER_IS_QUALIFIER(x) \
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, BOOST_PARAMETER_GET_QUALIFIER_GET(x) \
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, forward_reference \
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)
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/**/
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// Expands to the unqualified version of x,
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// where x is either a keyword qualifier or a keyword.
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//
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// k => k
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// in(k) => k
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// out(k) => k
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// in_out(k) => k
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// forward(k) => k
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// consume(k) => k
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// move_from(k) => k
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#define BOOST_PARAMETER_UNQUALIFIED(x) \
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BOOST_PP_IIF( \
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BOOST_PARAMETER_IS_QUALIFIER(x) \
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, BOOST_PARAMETER_GET_UNQUALIFIED(x) \
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, x \
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)
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/**/
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#endif // include guard
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