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108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
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@file add_noexcept
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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_ADD_NOEXCEPT_HPP
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#define BOOST_CLBL_TRTS_ADD_NOEXCEPT_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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BOOST_CLBL_TRTS_DEFINE_SFINAE_ERROR_ORIGIN(add_noexcept)
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BOOST_CLBL_TRTS_SFINAE_MSG(add_noexcept, cannot_add_noexcept_to_this_type)
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#ifndef BOOST_CLBL_TRTS_ENABLE_NOEXCEPT_TYPES
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template<typename T>
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struct add_noexcept_t {
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static_assert(std::is_same<T, detail::dummy>::value,
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"noexcept types not supported by this configuration.");
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};
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template<typename T>
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struct add_noexcept {
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static_assert(std::is_same<T, detail::dummy>::value,
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"noexcept types not supported by this configuration.");
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};
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#else
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//[ add_noexcept_hpp
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/*`
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[section:ref_add_noexcept add_noexcept]
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[heading Header]
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``#include <boost/callable_traits/add_noexcept.hpp>``
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[heading Definition]
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*/
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template<typename T>
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using add_noexcept_t = //see below
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//<-
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detail::try_but_fail_if_invalid<
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typename detail::traits<T>::add_noexcept,
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cannot_add_noexcept_to_this_type>;
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namespace detail {
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template<typename T, typename = std::false_type>
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struct add_noexcept_impl {};
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template<typename T>
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struct add_noexcept_impl <T, typename std::is_same<
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add_noexcept_t<T>, detail::dummy>::type>
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{
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using type = add_noexcept_t<T>;
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};
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}
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//->
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template<typename T>
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struct add_noexcept : detail::add_noexcept_impl<T> {};
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//<-
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#endif // #ifdef BOOST_CLBL_TRTS_ENABLE_NOEXCEPT_TYPES
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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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* `T` must be one of the following:
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* function type
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* function pointer type
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* function reference type
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* member function pointer type
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* If `T` is a pointer, it may not be cv/ref qualified
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[heading Behavior]
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* A substitution failure occurs if the constraints are violated.
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* Adds a `noexcept` specifier to `T`, if not already present.
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[heading Input/Output Examples]
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[table
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[[`T`] [`add_noexcept_t<T>`]]
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[[`int()`] [`int() noexcept`]]
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[[`int (&)()`] [`int(&)() noexcept`]]
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[[`int (*)()`] [`int(*)() noexcept`]]
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[[`int(foo::*)()`] [`int(foo::*)() noexcept`]]
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[[`int(foo::*)() &`] [`int(foo::*)() & noexcept`]]
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[[`int(foo::*)() &&`] [`int(foo::*)() && noexcept`]]
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[[`int(foo::*)() const transaction_safe`] [`int(foo::*)() const transaction_safe noexcept`]]
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[[`int(foo::*)() noexcept`] [`int(foo::*)() noexcept`]]
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[[`int`] [(substitution failure)]]
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[[`int foo::*`] [(substitution failure)]]
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[[`int (*&)()`] [(substitution failure)]]
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]
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[heading Example Program]
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[import ../example/add_noexcept.cpp]
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[add_noexcept]
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[endsect]
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*/
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//]
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#endif // #ifndef BOOST_CLBL_TRTS_ADD_NOEXCEPT_HPP
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