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Diffstat (limited to 'third_party/immer/immer/detail/type_traits.hpp')
| -rw-r--r-- | third_party/immer/immer/detail/type_traits.hpp | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/third_party/immer/immer/detail/type_traits.hpp b/third_party/immer/immer/detail/type_traits.hpp deleted file mode 100644 index afb2652c55..0000000000 --- a/third_party/immer/immer/detail/type_traits.hpp +++ /dev/null @@ -1,223 +0,0 @@ -// -// immer: immutable data structures for C++ -// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente -// -// This software is distributed under the Boost Software License, Version 1.0. -// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt -// - -#pragma once - -#include <algorithm> -#include <iterator> -#include <memory> -#include <type_traits> -#include <utility> - -namespace immer { -namespace detail { - -template <typename... Ts> -struct make_void -{ - using type = void; -}; - -template <typename... Ts> -using void_t = typename make_void<Ts...>::type; - -template <typename T, typename = void> -struct is_dereferenceable : std::false_type -{}; - -template <typename T> -struct is_dereferenceable<T, void_t<decltype(*(std::declval<T&>()))>> - : std::true_type -{}; - -template <typename T> -constexpr bool is_dereferenceable_v = is_dereferenceable<T>::value; - -template <typename T, typename U = T, typename = void> -struct is_equality_comparable : std::false_type -{}; - -template <typename T, typename U> -struct is_equality_comparable< - T, - U, - std::enable_if_t<std::is_same<bool, - decltype(std::declval<T&>() == - std::declval<U&>())>::value>> - : std::true_type -{}; - -template <typename T, typename U = T> -constexpr bool is_equality_comparable_v = is_equality_comparable<T, U>::value; - -template <typename T, typename U = T, typename = void> -struct is_inequality_comparable : std::false_type -{}; - -template <typename T, typename U> -struct is_inequality_comparable< - T, - U, - std::enable_if_t<std::is_same<bool, - decltype(std::declval<T&>() != - std::declval<U&>())>::value>> - : std::true_type -{}; - -template <typename T, typename U = T> -constexpr bool is_inequality_comparable_v = - is_inequality_comparable<T, U>::value; - -template <typename T, typename = void> -struct is_preincrementable : std::false_type -{}; - -template <typename T> -struct is_preincrementable< - T, - std::enable_if_t<std::is_same<T&, decltype(++(std::declval<T&>()))>::value>> - : std::true_type -{}; - -template <typename T> -constexpr bool is_preincrementable_v = is_preincrementable<T>::value; - -template <typename T, typename U = T, typename = void> -struct is_subtractable : std::false_type -{}; - -template <typename T, typename U> -struct is_subtractable< - T, - U, - void_t<decltype(std::declval<T&>() - std::declval<U&>())>> : std::true_type -{}; - -template <typename T, typename U = T> -constexpr bool is_subtractable_v = is_subtractable<T, U>::value; - -namespace swappable { - -using std::swap; - -template <typename T, typename U, typename = void> -struct with : std::false_type -{}; - -// Does not account for non-referenceable types -template <typename T, typename U> -struct with<T, - U, - void_t<decltype(swap(std::declval<T&>(), std::declval<U&>())), - decltype(swap(std::declval<U&>(), std::declval<T&>()))>> - : std::true_type -{}; - -} // namespace swappable - -template <typename T, typename U> -using is_swappable_with = swappable::with<T, U>; - -template <typename T> -using is_swappable = is_swappable_with<T, T>; - -template <typename T> -constexpr bool is_swappable_v = is_swappable_with<T&, T&>::value; - -template <typename T, typename = void> -struct is_iterator : std::false_type -{}; - -// See http://en.cppreference.com/w/cpp/concept/Iterator -template <typename T> -struct is_iterator< - T, - void_t< - std::enable_if_t<is_preincrementable_v<T> && - is_dereferenceable_v<T> - // accounts for non-referenceable types - && std::is_copy_constructible<T>::value && - std::is_copy_assignable<T>::value && - std::is_destructible<T>::value && is_swappable_v<T>>, - typename std::iterator_traits<T>::value_type, - typename std::iterator_traits<T>::difference_type, - typename std::iterator_traits<T>::reference, - typename std::iterator_traits<T>::pointer, - typename std::iterator_traits<T>::iterator_category>> : std::true_type -{}; - -template <typename T> -constexpr bool is_iterator_v = is_iterator<T>::value; - -template <typename T, typename U, typename = void> -struct compatible_sentinel : std::false_type -{}; - -template <typename T, typename U> -struct compatible_sentinel< - T, - U, - std::enable_if_t<is_iterator_v<T> && is_equality_comparable_v<T, U> && - is_inequality_comparable_v<T, U>>> : std::true_type -{}; - -template <typename T, typename U> -constexpr bool compatible_sentinel_v = compatible_sentinel<T, U>::value; - -template <typename T, typename = void> -struct is_forward_iterator : std::false_type -{}; - -template <typename T> -struct is_forward_iterator< - T, - std::enable_if_t<is_iterator_v<T> && - std::is_base_of<std::forward_iterator_tag, - typename std::iterator_traits< - T>::iterator_category>::value>> - : std::true_type -{}; - -template <typename T> -constexpr bool is_forward_iterator_v = is_forward_iterator<T>::value; - -template <typename T, typename U, typename = void> -struct std_distance_supports : std::false_type -{}; - -template <typename T, typename U> -struct std_distance_supports< - T, - U, - void_t<decltype(std::distance(std::declval<T>(), std::declval<U>()))>> - : std::true_type -{}; - -template <typename T, typename U> -constexpr bool std_distance_supports_v = std_distance_supports<T, U>::value; - -template <typename T, typename U, typename V, typename = void> -struct std_uninitialized_copy_supports : std::false_type -{}; - -template <typename T, typename U, typename V> -struct std_uninitialized_copy_supports< - T, - U, - V, - void_t<decltype(std::uninitialized_copy( - std::declval<T>(), std::declval<U>(), std::declval<V>()))>> - : std::true_type -{}; - -template <typename T, typename U, typename V> -constexpr bool std_uninitialized_copy_supports_v = - std_uninitialized_copy_supports<T, U, V>::value; - -} // namespace detail -} // namespace immer |