mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-10-31 11:15:51 +01:00
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
/*
|
|
|
|
@Copyright Barrett Adair 2015-2017
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
|
|
|
|
*/
|
|
|
|
#ifndef BOOST_CLBL_TRTS_DETAIL_UTILITY_HPP
|
|
#define BOOST_CLBL_TRTS_DETAIL_UTILITY_HPP
|
|
|
|
#include <boost/callable_traits/detail/config.hpp>
|
|
#include <boost/callable_traits/detail/sfinae_errors.hpp>
|
|
#include <boost/callable_traits/detail/qualifier_flags.hpp>
|
|
|
|
namespace boost { namespace callable_traits { namespace detail {
|
|
|
|
struct cdecl_tag{};
|
|
struct stdcall_tag{};
|
|
struct fastcall_tag{};
|
|
struct pascal_tag{};
|
|
|
|
struct invalid_type { invalid_type() = delete; };
|
|
struct reference_error { reference_error() = delete; };
|
|
|
|
template<typename T>
|
|
using error_type = typename std::conditional<
|
|
std::is_reference<T>::value, reference_error, invalid_type>::type;
|
|
|
|
#ifdef BOOST_CLBL_TRTS_DISABLE_ABOMINABLE_FUNCTIONS
|
|
struct abominable_functions_not_supported_on_this_compiler{};
|
|
#endif
|
|
|
|
// used to convey "this type doesn't matter" in code
|
|
struct dummy {};
|
|
|
|
// used as return type in failed SFINAE tests
|
|
struct substitution_failure : std::false_type{};
|
|
|
|
template<bool Value>
|
|
using bool_type = std::integral_constant<bool, Value>;
|
|
|
|
// shorthand for std::tuple_element
|
|
template<std::size_t I, typename Tup>
|
|
using at = typename std::tuple_element<I, Tup>::type;
|
|
|
|
template<typename T, typename Class>
|
|
using add_member_pointer = T Class::*;
|
|
|
|
template<typename L, typename R, typename ErrorType>
|
|
using fail_when_same = fail_if<std::is_same<L, R>::value, ErrorType>;
|
|
|
|
template<typename T, typename ErrorType,
|
|
typename U = typename std::remove_reference<T>::type>
|
|
using try_but_fail_if_invalid = sfinae_try<T,
|
|
fail_when_same<U, invalid_type, ErrorType>,
|
|
fail_when_same<U, reference_error,
|
|
reference_type_not_supported_by_this_metafunction>>;
|
|
|
|
template<typename T, typename ErrorType,
|
|
typename U = typename std::remove_reference<T>::type,
|
|
bool is_reference_error = std::is_same<reference_error, U>::value>
|
|
using fail_if_invalid = fail_if<
|
|
std::is_same<U, invalid_type>::value || is_reference_error,
|
|
typename std::conditional<is_reference_error,
|
|
reference_type_not_supported_by_this_metafunction, ErrorType>::type>;
|
|
|
|
template<typename T, typename Fallback>
|
|
using fallback_if_invalid = typename std::conditional<
|
|
std::is_same<T, invalid_type>::value, Fallback, T>::type;
|
|
|
|
template<typename T, template<class> class Alias, typename U = Alias<T>>
|
|
struct force_sfinae {
|
|
using type = U;
|
|
};
|
|
|
|
template<typename T>
|
|
using shallow_decay = typename std::remove_cv<
|
|
typename std::remove_reference<T>::type>::type;
|
|
|
|
template<typename T>
|
|
struct is_reference_wrapper_t {
|
|
using type = std::false_type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct is_reference_wrapper_t<std::reference_wrapper<T>> {
|
|
using type = std::true_type;
|
|
};
|
|
|
|
template<typename T>
|
|
using is_reference_wrapper =
|
|
typename is_reference_wrapper_t<shallow_decay<T>>::type;
|
|
|
|
template<typename T, typename = std::true_type>
|
|
struct unwrap_reference_t {
|
|
using type = T;
|
|
};
|
|
|
|
template<typename T>
|
|
struct unwrap_reference_t<T, is_reference_wrapper<T>> {
|
|
using type = decltype(std::declval<T>().get());
|
|
};
|
|
|
|
// removes std::reference_wrapper
|
|
template<typename T>
|
|
using unwrap_reference = typename unwrap_reference_t<T>::type;
|
|
|
|
}}} // namespace boost::callable_traits::detail
|
|
|
|
#endif // #ifndef BOOST_CLBL_TRTS_DETAIL_UTILITY_HPP
|