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100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
/*
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@Copyright Barrett Adair 2015-2017
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_CLBL_TRTS_HAS_MEMBER_QUALIFIERS_HPP
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#define BOOST_CLBL_TRTS_HAS_MEMBER_QUALIFIERS_HPP
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#include <boost/callable_traits/detail/core.hpp>
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namespace boost { namespace callable_traits {
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//[ has_member_qualifiers_hpp
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/*`[section:ref_has_member_qualifiers has_member_qualifiers]
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[heading Header]
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``#include <boost/callable_traits/has_member_qualifiers.hpp>``
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[heading Definition]
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*/
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// inherits from either std::true_type or std::false_type
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template<typename T>
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struct has_member_qualifiers;
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//<-
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template<typename T>
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struct has_member_qualifiers : detail::traits<
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detail::shallow_decay<T>>::has_member_qualifiers {
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using type = typename detail::traits<
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detail::shallow_decay<T>>::has_member_qualifiers;
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};
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// older compilers don't support variable templates
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#ifdef BOOST_CLBL_TRTS_DISABLE_VARIABLE_TEMPLATES
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template<typename T>
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struct has_member_qualifiers_v {
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static_assert(std::is_same<T, detail::dummy>::value,
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"Variable templates not supported on this compiler.");
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};
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#else
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//->
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// only available when variable templates are supported
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template<typename T>
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//<-
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BOOST_CLBL_TRAITS_INLINE_VAR
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//->
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constexpr bool has_member_qualifiers_v = //see below
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//<-
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detail::traits<detail::shallow_decay<T>>::has_member_qualifiers::value;
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#endif
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}} // namespace boost::callable_traits
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//->
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/*`
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[heading Constraints]
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* none
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[heading Behavior]
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* `std::false_type` is inherited by `has_member_qualifiers<T>` and is aliased by `typename has_member_qualifiers<T>::type`, except when one of the following criteria is met, in which case `std::true_type` would be similarly inherited and aliased:
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* `T` is a function with member qualifiers
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* `T` is a member function pointer with member qualifiers
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* `T` is a function object with a member-qualified `operator()`
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* On compilers that support variable templates, `has_member_qualifiers_v<T>` is equivalent to `has_member_qualifiers<T>::value`.
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[heading Input/Output Examples]
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[table
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[[`T`] [`has_member_qualifiers_v<T>`]]
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[[`void() const`] [`true`]]
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[[`void() const transaction_safe`] [`true`]]
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[[`void() volatile &&`] [`true`]]
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[[`int(foo::*)() &`] [`true`]]
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[[`void(foo::*)() const`] [`true`]]
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[[`void(foo::*&)() const`] [`true`]]
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[[`void(foo::* const)() const`] [`true`]]
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[[`void()`] [`false`]]
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[[`void() transaction_safe`] [`false`]]
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[[`void(*)()`] [`false`]]
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[[`void(*&)()`] [`false`]]
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[[`int`] [`false`]]
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[[`const int`] [`false`]]
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[[`int foo::*`] [`false`]]
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[[`const int foo::*`] [`false`]]
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]
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[heading Example Program]
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[import ../example/has_member_qualifiers.cpp]
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[has_member_qualifiers]
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[endsect]
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*/
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//]
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#endif //BOOST_CLBL_TRTS_HAS_MEMBER_QUALIFIERS_HPP
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