745 lines
28 KiB
C++
745 lines
28 KiB
C++
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// Copyright Daniel Wallin, David Abrahams 2005.
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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_KEYWORD_HPP
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#define BOOST_PARAMETER_KEYWORD_HPP
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#include <boost/parameter/aux_/tag.hpp>
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#include <boost/parameter/aux_/default.hpp>
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#include <boost/parameter/keyword_fwd.hpp>
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#include <boost/parameter/config.hpp>
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#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
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#include <boost/core/enable_if.hpp>
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#include <utility>
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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#include <boost/mp11/integral.hpp>
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#include <boost/mp11/utility.hpp>
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#include <type_traits>
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#else
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/eval_if.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/is_scalar.hpp>
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#include <boost/type_traits/is_const.hpp>
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#endif
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namespace boost { namespace parameter {
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// Instances of unique specializations of keyword<...> serve to
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// associate arguments with parameter names. For example:
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//
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// struct rate_; // parameter names
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// struct skew_;
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//
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// namespace
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// {
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// keyword<rate_> rate; // keywords
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// keyword<skew_> skew;
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// }
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//
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// ...
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//
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// f(rate = 1, skew = 2.4);
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template <typename Tag>
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struct keyword
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{
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typedef Tag tag;
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inline BOOST_CONSTEXPR keyword()
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{
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}
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template <typename T>
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inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::std::is_scalar<T>
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, ::boost::mp11::mp_true
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, ::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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::boost::is_scalar<T>
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, ::boost::mpl::true_
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, ::boost::mpl::eval_if<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::false_
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>
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>
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::tag<Tag,T const&>
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>::type
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operator=(T const& x) const
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{
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typedef typename ::boost::parameter::aux
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::tag<Tag,T const&>::type result;
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return result(x);
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}
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template <typename Default>
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inline BOOST_CONSTEXPR typename ::boost::enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::std::is_scalar<Default>
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, ::boost::mp11::mp_true
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, ::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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::boost::is_scalar<Default>
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, ::boost::mpl::true_
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, ::boost::mpl::eval_if<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::false_
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>
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>
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::default_<Tag,Default const>
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>::type
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operator|(Default const& d) const
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{
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return ::boost::parameter::aux::default_<Tag,Default const>(d);
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}
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template <typename T>
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inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::out_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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, ::boost::mp11::mp_if<
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::std::is_const<T>
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, ::boost::mp11::mp_false
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, ::boost::mp11::mp_true
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>
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, ::boost::mp11::mp_false
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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typename ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::out_reference
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>
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, ::boost::mpl::true_
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, ::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>::type
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, ::boost::mpl::if_<
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::boost::is_const<T>
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, ::boost::mpl::false_
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, ::boost::mpl::true_
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>
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, ::boost::mpl::false_
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::tag<Tag,T&>
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>::type
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operator=(T& x) const
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{
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typedef typename ::boost::parameter::aux
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::tag<Tag,T&>::type result;
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return result(x);
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}
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template <typename Default>
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inline BOOST_CONSTEXPR typename ::boost::enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::out_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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, ::boost::mp11::mp_if<
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::std::is_const<Default>
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, ::boost::mp11::mp_false
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, ::boost::mp11::mp_true
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>
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, ::boost::mp11::mp_false
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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typename ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::out_reference
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>
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, ::boost::mpl::true_
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, ::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>::type
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, ::boost::mpl::if_<
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::boost::is_const<Default>
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, ::boost::mpl::false_
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, ::boost::mpl::true_
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>
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, ::boost::mpl::false_
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::default_<Tag,Default>
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>::type
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operator|(Default& d) const
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{
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return ::boost::parameter::aux::default_<Tag,Default>(d);
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}
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template <typename Default>
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inline BOOST_CONSTEXPR
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::boost::parameter::aux::lazy_default<Tag,Default const>
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operator||(Default const& d) const
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{
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return ::boost::parameter::aux
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::lazy_default<Tag,Default const>(d);
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}
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template <typename Default>
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inline BOOST_CONSTEXPR
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::boost::parameter::aux::lazy_default<Tag,Default>
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operator||(Default& d) const
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{
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return ::boost::parameter::aux::lazy_default<Tag,Default>(d);
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}
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template <typename T>
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inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::std::is_scalar<T>
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, ::boost::mp11::mp_false
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, ::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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::boost::is_scalar<T>
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, ::boost::mpl::false_
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, ::boost::mpl::eval_if<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::false_
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>
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>
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::tag<Tag,T const>
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>::type
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operator=(T const&& x) const
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{
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typedef typename ::boost::parameter::aux
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::tag<Tag,T const>::type result;
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return result(::std::forward<T const>(x));
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}
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template <typename T>
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inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::std::is_scalar<T>
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, ::boost::mp11::mp_false
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, ::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::consume_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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::boost::is_scalar<T>
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, ::boost::mpl::false_
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, ::boost::mpl::eval_if<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::consume_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::if_<
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::boost::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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, ::boost::mpl::true_
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, ::boost::mpl::false_
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>
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>
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>::type
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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, ::boost::parameter::aux::tag<Tag,T>
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>::type
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operator=(T&& x) const
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{
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typedef typename ::boost::parameter::aux::tag<Tag,T>::type result;
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return result(::std::forward<T>(x));
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}
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template <typename Default>
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inline BOOST_CONSTEXPR typename ::boost::enable_if<
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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::boost::mp11::mp_if<
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::std::is_scalar<Default>
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, ::boost::mp11::mp_false
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, ::boost::mp11::mp_if<
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::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::in_reference
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>
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, ::boost::mp11::mp_true
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, ::std::is_same<
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typename Tag::qualifier
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, ::boost::parameter::forward_reference
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>
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>
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>
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#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
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typename ::boost::mpl::eval_if<
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|
|
::boost::is_scalar<Default>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
, ::boost::mpl::eval_if<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::in_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_PARAMETER_CAN_USE_MP11
|
||
|
|
, ::boost::parameter::aux::default_r_<Tag,Default const>
|
||
|
|
>::type
|
||
|
|
operator|(Default const&& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux::default_r_<Tag,Default const>(
|
||
|
|
::std::forward<Default const>(d)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Default>
|
||
|
|
inline BOOST_CONSTEXPR typename ::boost::enable_if<
|
||
|
|
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
|
||
|
|
::boost::mp11::mp_if<
|
||
|
|
::std::is_scalar<Default>
|
||
|
|
, ::boost::mp11::mp_false
|
||
|
|
, ::boost::mp11::mp_if<
|
||
|
|
::std::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::consume_reference
|
||
|
|
>
|
||
|
|
, ::boost::mp11::mp_true
|
||
|
|
, ::std::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>
|
||
|
|
#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
|
||
|
|
typename ::boost::mpl::eval_if<
|
||
|
|
::boost::is_scalar<Default>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
, ::boost::mpl::eval_if<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::consume_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_PARAMETER_CAN_USE_MP11
|
||
|
|
, ::boost::parameter::aux::default_r_<Tag,Default>
|
||
|
|
>::type
|
||
|
|
operator|(Default&& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux
|
||
|
|
::default_r_<Tag,Default>(::std::forward<Default>(d));
|
||
|
|
}
|
||
|
|
|
||
|
|
public: // Insurance against ODR violations
|
||
|
|
// Users will need to define their keywords in header files. To
|
||
|
|
// prevent ODR violations, it's important that the keyword used in
|
||
|
|
// every instantiation of a function template is the same object.
|
||
|
|
// We provide a reference to a common instance of each keyword
|
||
|
|
// object and prevent construction by users.
|
||
|
|
static ::boost::parameter::keyword<Tag> const instance;
|
||
|
|
|
||
|
|
// This interface is deprecated.
|
||
|
|
static ::boost::parameter::keyword<Tag>& get()
|
||
|
|
{
|
||
|
|
return const_cast< ::boost::parameter::keyword<Tag>&>(instance);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Tag>
|
||
|
|
::boost::parameter::keyword<Tag> const ::boost::parameter
|
||
|
|
::keyword<Tag>::instance = ::boost::parameter::keyword<Tag>();
|
||
|
|
}} // namespace boost::parameter
|
||
|
|
|
||
|
|
#else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
|
||
|
|
|
||
|
|
#if !defined(BOOST_NO_SFINAE)
|
||
|
|
#include <boost/mpl/bool.hpp>
|
||
|
|
#include <boost/mpl/if.hpp>
|
||
|
|
#include <boost/mpl/eval_if.hpp>
|
||
|
|
#include <boost/core/enable_if.hpp>
|
||
|
|
#include <boost/type_traits/is_same.hpp>
|
||
|
|
#include <boost/type_traits/is_scalar.hpp>
|
||
|
|
#include <boost/type_traits/is_const.hpp>
|
||
|
|
#endif // BOOST_NO_SFINAE
|
||
|
|
|
||
|
|
namespace boost { namespace parameter {
|
||
|
|
|
||
|
|
// Instances of unique specializations of keyword<...> serve to
|
||
|
|
// associate arguments with parameter names. For example:
|
||
|
|
//
|
||
|
|
// struct rate_; // parameter names
|
||
|
|
// struct skew_;
|
||
|
|
//
|
||
|
|
// namespace
|
||
|
|
// {
|
||
|
|
// keyword<rate_> rate; // keywords
|
||
|
|
// keyword<skew_> skew;
|
||
|
|
// }
|
||
|
|
//
|
||
|
|
// ...
|
||
|
|
//
|
||
|
|
// f(rate = 1, skew = 2.4);
|
||
|
|
template <typename Tag>
|
||
|
|
struct keyword
|
||
|
|
{
|
||
|
|
typedef Tag tag;
|
||
|
|
|
||
|
|
inline BOOST_CONSTEXPR keyword()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
#if defined(BOOST_NO_SFINAE)
|
||
|
|
inline typename ::boost::parameter::aux::tag<Tag,T const&>::type
|
||
|
|
#else
|
||
|
|
inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
|
||
|
|
typename ::boost::mpl::eval_if<
|
||
|
|
::boost::is_scalar<T>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::eval_if<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::in_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
, ::boost::parameter::aux::tag<Tag,T const&>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_NO_SFINAE
|
||
|
|
operator=(T const& x) const
|
||
|
|
{
|
||
|
|
typedef typename ::boost::parameter::aux
|
||
|
|
::tag<Tag,T const&>::type result;
|
||
|
|
return result(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Default>
|
||
|
|
#if defined(BOOST_NO_SFINAE)
|
||
|
|
inline ::boost::parameter::aux::default_<Tag,Default const>
|
||
|
|
#else
|
||
|
|
inline BOOST_CONSTEXPR typename ::boost::enable_if<
|
||
|
|
typename ::boost::mpl::eval_if<
|
||
|
|
::boost::is_scalar<Default>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::eval_if<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::in_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
, ::boost::parameter::aux::default_<Tag,Default const>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_NO_SFINAE
|
||
|
|
operator|(Default const& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux::default_<Tag,Default const>(d);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
#if defined(BOOST_NO_SFINAE)
|
||
|
|
inline typename ::boost::parameter::aux::tag<Tag,T&>::type
|
||
|
|
#else
|
||
|
|
inline BOOST_CONSTEXPR typename ::boost::lazy_enable_if<
|
||
|
|
typename ::boost::mpl::eval_if<
|
||
|
|
typename ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::out_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_const<T>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>::type
|
||
|
|
, ::boost::parameter::aux::tag<Tag,T&>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_NO_SFINAE
|
||
|
|
operator=(T& x) const
|
||
|
|
{
|
||
|
|
typedef typename ::boost::parameter::aux
|
||
|
|
::tag<Tag,T&>::type result;
|
||
|
|
return result(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Default>
|
||
|
|
#if defined(BOOST_NO_SFINAE)
|
||
|
|
inline ::boost::parameter::aux::default_<Tag,Default>
|
||
|
|
#else
|
||
|
|
inline BOOST_CONSTEXPR typename ::boost::enable_if<
|
||
|
|
typename ::boost::mpl::eval_if<
|
||
|
|
typename ::boost::mpl::if_<
|
||
|
|
::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::out_reference
|
||
|
|
>
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
, ::boost::is_same<
|
||
|
|
typename Tag::qualifier
|
||
|
|
, ::boost::parameter::forward_reference
|
||
|
|
>
|
||
|
|
>::type
|
||
|
|
, ::boost::mpl::if_<
|
||
|
|
::boost::is_const<Default>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
, ::boost::mpl::true_
|
||
|
|
>
|
||
|
|
, ::boost::mpl::false_
|
||
|
|
>::type
|
||
|
|
, ::boost::parameter::aux::default_<Tag,Default>
|
||
|
|
>::type
|
||
|
|
#endif // BOOST_NO_SFINAE
|
||
|
|
operator|(Default& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux::default_<Tag,Default>(d);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Default>
|
||
|
|
inline BOOST_CONSTEXPR
|
||
|
|
::boost::parameter::aux::lazy_default<Tag,Default const>
|
||
|
|
operator||(Default const& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux
|
||
|
|
::lazy_default<Tag,Default const>(d);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Default>
|
||
|
|
inline BOOST_CONSTEXPR
|
||
|
|
::boost::parameter::aux::lazy_default<Tag,Default>
|
||
|
|
operator||(Default& d) const
|
||
|
|
{
|
||
|
|
return ::boost::parameter::aux::lazy_default<Tag,Default>(d);
|
||
|
|
}
|
||
|
|
|
||
|
|
public: // Insurance against ODR violations
|
||
|
|
// Users will need to define their keywords in header files. To
|
||
|
|
// prevent ODR violations, it's important that the keyword used in
|
||
|
|
// every instantiation of a function template is the same object.
|
||
|
|
// We provide a reference to a common instance of each keyword
|
||
|
|
// object and prevent construction by users.
|
||
|
|
static ::boost::parameter::keyword<Tag> const instance;
|
||
|
|
|
||
|
|
// This interface is deprecated.
|
||
|
|
static ::boost::parameter::keyword<Tag>& get()
|
||
|
|
{
|
||
|
|
return const_cast< ::boost::parameter::keyword<Tag>&>(instance);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Tag>
|
||
|
|
::boost::parameter::keyword<Tag> const ::boost::parameter
|
||
|
|
::keyword<Tag>::instance = ::boost::parameter::keyword<Tag>();
|
||
|
|
}} // namespace boost::parameter
|
||
|
|
|
||
|
|
#endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
|
||
|
|
|
||
|
|
#include <boost/parameter/aux_/name.hpp>
|
||
|
|
#include <boost/preprocessor/stringize.hpp>
|
||
|
|
|
||
|
|
// Reduces boilerplate required to declare and initialize keywords without
|
||
|
|
// violating ODR. Declares a keyword tag type with the given name in
|
||
|
|
// namespace tag_namespace, and declares and initializes a reference in an
|
||
|
|
// anonymous namespace to a singleton instance of that type.
|
||
|
|
#if defined(BOOST_PARAMETER_CAN_USE_MP11)
|
||
|
|
#define BOOST_PARAMETER_KEYWORD(tag_namespace, name) \
|
||
|
|
namespace tag_namespace \
|
||
|
|
{ \
|
||
|
|
struct name \
|
||
|
|
{ \
|
||
|
|
static BOOST_CONSTEXPR char const* keyword_name() \
|
||
|
|
{ \
|
||
|
|
return BOOST_PP_STRINGIZE(name); \
|
||
|
|
} \
|
||
|
|
using _ = BOOST_PARAMETER_TAG_PLACEHOLDER_TYPE(name); \
|
||
|
|
using _1 = _; \
|
||
|
|
BOOST_PARAMETER_TAG_MP11_PLACEHOLDER_BINDING(binding_fn, name); \
|
||
|
|
BOOST_PARAMETER_TAG_MP11_PLACEHOLDER_VALUE(fn, name); \
|
||
|
|
using qualifier = ::boost::parameter::forward_reference; \
|
||
|
|
}; \
|
||
|
|
} \
|
||
|
|
namespace \
|
||
|
|
{ \
|
||
|
|
::boost::parameter::keyword<tag_namespace::name> const& name \
|
||
|
|
= ::boost::parameter::keyword<tag_namespace::name>::instance; \
|
||
|
|
}
|
||
|
|
/**/
|
||
|
|
#else // !defined(BOOST_PARAMETER_CAN_USE_MP11)
|
||
|
|
#define BOOST_PARAMETER_KEYWORD(tag_namespace, name) \
|
||
|
|
namespace tag_namespace \
|
||
|
|
{ \
|
||
|
|
struct name \
|
||
|
|
{ \
|
||
|
|
static BOOST_CONSTEXPR char const* keyword_name() \
|
||
|
|
{ \
|
||
|
|
return BOOST_PP_STRINGIZE(name); \
|
||
|
|
} \
|
||
|
|
typedef BOOST_PARAMETER_TAG_PLACEHOLDER_TYPE(name) _; \
|
||
|
|
typedef BOOST_PARAMETER_TAG_PLACEHOLDER_TYPE(name) _1; \
|
||
|
|
typedef ::boost::parameter::forward_reference qualifier; \
|
||
|
|
}; \
|
||
|
|
} \
|
||
|
|
namespace \
|
||
|
|
{ \
|
||
|
|
::boost::parameter::keyword<tag_namespace::name> const& name \
|
||
|
|
= ::boost::parameter::keyword<tag_namespace::name>::instance; \
|
||
|
|
}
|
||
|
|
/**/
|
||
|
|
#endif // BOOST_PARAMETER_CAN_USE_MP11
|
||
|
|
|
||
|
|
#endif // include guard
|
||
|
|
|