199 lines
5.8 KiB
C++
199 lines
5.8 KiB
C++
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// Copyright Cromwell D. Enage 2018.
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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_AUGMENT_PREDICATE_HPP
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#define BOOST_PARAMETER_AUGMENT_PREDICATE_HPP
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#include <boost/parameter/keyword_fwd.hpp>
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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_lvalue_reference.hpp>
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#include <boost/type_traits/is_scalar.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <typename V, typename R, typename Tag>
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struct augment_predicate_check_consume_ref
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: ::boost::mpl::eval_if<
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::boost::is_scalar<V>
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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::consume_reference
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>
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, ::boost::mpl::if_<
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::boost::is_lvalue_reference<R>
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, ::boost::mpl::false_
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, ::boost::mpl::true_
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>
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, boost::mpl::true_
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>
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>::type
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{
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};
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}}} // namespace boost::parameter::aux
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#include <boost/type_traits/is_const.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <typename V, typename R, typename Tag>
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struct augment_predicate_check_out_ref
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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::out_reference
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>
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, ::boost::mpl::eval_if<
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::boost::is_lvalue_reference<R>
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, ::boost::mpl::if_<
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::boost::is_const<V>
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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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>
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, ::boost::mpl::true_
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>::type
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{
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};
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}}} // namespace boost::parameter::aux
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#include <boost/parameter/aux_/lambda_tag.hpp>
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#include <boost/mpl/apply_wrap.hpp>
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#include <boost/mpl/lambda.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <
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typename Predicate
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, typename R
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, typename Tag
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, typename T
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, typename Args
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>
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class augment_predicate
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{
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typedef typename ::boost::mpl::lambda<
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Predicate
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, ::boost::parameter::aux::lambda_tag
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>::type _actual_predicate;
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public:
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typedef typename ::boost::mpl::eval_if<
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typename ::boost::mpl::if_<
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::boost::parameter::aux
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::augment_predicate_check_consume_ref<T,R,Tag>
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, ::boost::parameter::aux
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::augment_predicate_check_out_ref<T,R,Tag>
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, ::boost::mpl::false_
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>::type
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, ::boost::mpl::apply_wrap2<_actual_predicate,T,Args>
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, ::boost::mpl::false_
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>::type type;
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};
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}}} // namespace boost::parameter::aux
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#include <boost/parameter/config.hpp>
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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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namespace boost { namespace parameter { namespace aux {
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template <typename V, typename R, typename Tag>
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using augment_predicate_check_consume_ref_mp11 = ::boost::mp11::mp_if<
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::std::is_scalar<V>
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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::consume_reference
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>
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, ::boost::mp11::mp_if<
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::std::is_lvalue_reference<R>
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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_true
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>
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>;
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template <typename V, typename R, typename Tag>
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using augment_predicate_check_out_ref_mp11 = ::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_if<
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::std::is_lvalue_reference<R>
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, ::boost::mp11::mp_if<
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::std::is_const<V>
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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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, ::boost::mp11::mp_true
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>;
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}}} // namespace boost::parameter::aux
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#include <boost/mp11/list.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <
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typename Predicate
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, typename R
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, typename Tag
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, typename T
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, typename Args
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>
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struct augment_predicate_mp11_impl
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{
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using type = ::boost::mp11::mp_if<
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::boost::mp11::mp_if<
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::boost::parameter::aux
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::augment_predicate_check_consume_ref_mp11<T,R,Tag>
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, ::boost::parameter::aux
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::augment_predicate_check_out_ref_mp11<T,R,Tag>
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, ::boost::mp11::mp_false
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>
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, ::boost::mp11
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::mp_apply_q<Predicate,::boost::mp11::mp_list<T,Args> >
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, ::boost::mp11::mp_false
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>;
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};
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}}} // namespace boost::parameter::aux
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#include <boost/parameter/aux_/has_nested_template_fn.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <
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typename Predicate
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, typename R
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, typename Tag
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, typename T
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, typename Args
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>
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using augment_predicate_mp11 = ::boost::mp11::mp_if<
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::boost::parameter::aux::has_nested_template_fn<Predicate>
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, ::boost::parameter::aux
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::augment_predicate_mp11_impl<Predicate,R,Tag,T,Args>
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, ::boost::parameter::aux
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::augment_predicate<Predicate,R,Tag,T,Args>
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>;
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}}} // namespace boost::parameter::aux
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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#endif // include guard
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