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-// The MIT License (MIT)
-
-// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
-
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-// the Software, and to permit persons to whom the Software is furnished to do so,
-// subject to the following conditions:
-
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef SOL_TRAITS_HPP
-#define SOL_TRAITS_HPP
-
-#include "tuple.hpp"
-#include "bind_traits.hpp"
-#include <type_traits>
-#include <memory>
-#include <functional>
-
-namespace sol {
- template<std::size_t I>
- using index_value = std::integral_constant<std::size_t, I>;
-
- namespace meta {
- template<typename T>
- struct identity { typedef T type; };
-
- template<typename T>
- using identity_t = typename identity<T>::type;
-
- template<typename... Args>
- struct is_tuple : std::false_type { };
-
- template<typename... Args>
- struct is_tuple<std::tuple<Args...>> : std::true_type { };
-
- template <typename T>
- struct is_builtin_type : std::integral_constant<bool, std::is_arithmetic<T>::value || std::is_pointer<T>::value || std::is_array<T>::value> {};
-
- template<typename T>
- struct unwrapped {
- typedef T type;
- };
-
- template<typename T>
- struct unwrapped<std::reference_wrapper<T>> {
- typedef T type;
- };
-
- template<typename T>
- using unwrapped_t = typename unwrapped<T>::type;
-
- template <typename T>
- struct unwrap_unqualified : unwrapped<unqualified_t<T>> {};
-
- template <typename T>
- using unwrap_unqualified_t = typename unwrap_unqualified<T>::type;
-
- template<typename T>
- struct remove_member_pointer;
-
- template<typename R, typename T>
- struct remove_member_pointer<R T::*> {
- typedef R type;
- };
-
- template<typename R, typename T>
- struct remove_member_pointer<R T::* const> {
- typedef R type;
- };
-
- template<typename T>
- using remove_member_pointer_t = remove_member_pointer<T>;
-
- template<template<typename...> class Templ, typename T>
- struct is_specialization_of : std::false_type { };
- template<typename... T, template<typename...> class Templ>
- struct is_specialization_of<Templ, Templ<T...>> : std::true_type { };
-
- template<class T, class...>
- struct all_same : std::true_type { };
-
- template<class T, class U, class... Args>
- struct all_same<T, U, Args...> : std::integral_constant <bool, std::is_same<T, U>::value && all_same<T, Args...>::value> { };
-
- template<class T, class...>
- struct any_same : std::false_type { };
-
- template<class T, class U, class... Args>
- struct any_same<T, U, Args...> : std::integral_constant <bool, std::is_same<T, U>::value || any_same<T, Args...>::value> { };
-
- template<typename T>
- using invoke_t = typename T::type;
-
- template<bool B>
- using boolean = std::integral_constant<bool, B>;
-
- template<typename T>
- using neg = boolean<!T::value>;
-
- template<typename Condition, typename Then, typename Else>
- using condition = std::conditional_t<Condition::value, Then, Else>;
-
- template<typename... Args>
- struct all : boolean<true> {};
-
- template<typename T, typename... Args>
- struct all<T, Args...> : condition<T, all<Args...>, boolean<false>> {};
-
- template<typename... Args>
- struct any : boolean<false> {};
-
- template<typename T, typename... Args>
- struct any<T, Args...> : condition<T, boolean<true>, any<Args...>> {};
-
- enum class enable_t {
- _
- };
-
- constexpr const auto enabler = enable_t::_;
-
- template<bool value, typename T = void>
- using disable_if_t = std::enable_if_t<!value, T>;
-
- template<typename... Args>
- using enable = std::enable_if_t<all<Args...>::value, enable_t>;
-
- template<typename... Args>
- using disable = std::enable_if_t<neg<all<Args...>>::value, enable_t>;
-
- template<typename... Args>
- using disable_any = std::enable_if_t<neg<any<Args...>>::value, enable_t>;
-
- template<typename V, typename... Vs>
- struct find_in_pack_v : boolean<false> { };
-
- template<typename V, typename Vs1, typename... Vs>
- struct find_in_pack_v<V, Vs1, Vs...> : any<boolean<(V::value == Vs1::value)>, find_in_pack_v<V, Vs...>> { };
-
- namespace meta_detail {
- template<std::size_t I, typename T, typename... Args>
- struct index_in_pack : std::integral_constant<std::size_t, SIZE_MAX> { };
-
- template<std::size_t I, typename T, typename T1, typename... Args>
- struct index_in_pack<I, T, T1, Args...> : std::conditional_t<std::is_same<T, T1>::value, std::integral_constant<std::ptrdiff_t, I>, index_in_pack<I + 1, T, Args...>> { };
- }
-
- template<typename T, typename... Args>
- struct index_in_pack : meta_detail::index_in_pack<0, T, Args...> { };
-
- template<typename T, typename List>
- struct index_in : meta_detail::index_in_pack<0, T, List> { };
-
- template<typename T, typename... Args>
- struct index_in<T, types<Args...>> : meta_detail::index_in_pack<0, T, Args...> { };
-
- template<std::size_t I, typename... Args>
- struct at_in_pack {};
-
- template<std::size_t I, typename... Args>
- using at_in_pack_t = typename at_in_pack<I, Args...>::type;
-
- template<std::size_t I, typename Arg, typename... Args>
- struct at_in_pack<I, Arg, Args...> : std::conditional<I == 0, Arg, at_in_pack_t<I - 1, Args...>> {};
-
- template<typename Arg, typename... Args>
- struct at_in_pack<0, Arg, Args...> { typedef Arg type; };
-
- namespace meta_detail {
- template<std::size_t Limit, std::size_t I, template<typename...> class Pred, typename... Ts>
- struct count_for_pack : std::integral_constant<std::size_t, 0> {};
- template<std::size_t Limit, std::size_t I, template<typename...> class Pred, typename T, typename... Ts>
- struct count_for_pack<Limit, I, Pred, T, Ts...> : std::conditional_t < sizeof...(Ts) == 0 || Limit < 2,
- std::integral_constant<std::size_t, I + static_cast<std::size_t>(Limit != 0 && Pred<T>::value)>,
- count_for_pack<Limit - 1, I + static_cast<std::size_t>(Pred<T>::value), Pred, Ts...>
- > { };
- template<std::size_t I, template<typename...> class Pred, typename... Ts>
- struct count_2_for_pack : std::integral_constant<std::size_t, 0> {};
- template<std::size_t I, template<typename...> class Pred, typename T, typename U, typename... Ts>
- struct count_2_for_pack<I, Pred, T, U, Ts...> : std::conditional_t<sizeof...(Ts) == 0,
- std::integral_constant<std::size_t, I + static_cast<std::size_t>(Pred<T>::value)>,
- count_2_for_pack<I + static_cast<std::size_t>(Pred<T>::value), Pred, Ts...>
- > { };
- } // meta_detail
-
- template<template<typename...> class Pred, typename... Ts>
- struct count_for_pack : meta_detail::count_for_pack<sizeof...(Ts), 0, Pred, Ts...> { };
-
- template<template<typename...> class Pred, typename List>
- struct count_for;
-
- template<template<typename...> class Pred, typename... Args>
- struct count_for<Pred, types<Args...>> : count_for_pack<Pred, Args...> {};
-
- template<std::size_t Limit, template<typename...> class Pred, typename... Ts>
- struct count_for_to_pack : meta_detail::count_for_pack<Limit, 0, Pred, Ts...> { };
-
- template<template<typename...> class Pred, typename... Ts>
- struct count_2_for_pack : meta_detail::count_2_for_pack<0, Pred, Ts...> { };
-
- template<typename... Args>
- struct return_type {
- typedef std::tuple<Args...> type;
- };
-
- template<typename T>
- struct return_type<T> {
- typedef T type;
- };
-
- template<>
- struct return_type<> {
- typedef void type;
- };
-
- template <typename... Args>
- using return_type_t = typename return_type<Args...>::type;
-
- namespace meta_detail {
- template <typename> struct always_true : std::true_type {};
- struct is_invokable_tester {
- template <typename Fun, typename... Args>
- always_true<decltype(std::declval<Fun>()(std::declval<Args>()...))> static test(int);
- template <typename...>
- std::false_type static test(...);
- };
- } // meta_detail
-
- template <typename T>
- struct is_invokable;
- template <typename Fun, typename... Args>
- struct is_invokable<Fun(Args...)> : decltype(meta_detail::is_invokable_tester::test<Fun, Args...>(0)) {};
-
- namespace meta_detail {
-
- template<typename T, bool isclass = std::is_class<unqualified_t<T>>::value>
- struct is_callable : std::is_function<std::remove_pointer_t<T>> {};
-
- template<typename T>
- struct is_callable<T, true> {
- using yes = char;
- using no = struct { char s[2]; };
-
- struct F { void operator()() {}; };
- struct Derived : T, F {};
- template<typename U, U> struct Check;
-
- template<typename V>
- static no test(Check<void (F::*)(), &V::operator()>*);
-
- template<typename>
- static yes test(...);
-
- static const bool value = sizeof(test<Derived>(0)) == sizeof(yes);
- };
-
- struct has_begin_end_impl {
- template<typename T, typename U = unqualified_t<T>,
- typename B = decltype(std::declval<U&>().begin()),
- typename E = decltype(std::declval<U&>().end())>
- static std::true_type test(int);
-
- template<typename...>
- static std::false_type test(...);
- };
-
- struct has_key_value_pair_impl {
- template<typename T, typename U = unqualified_t<T>,
- typename V = typename U::value_type,
- typename F = decltype(std::declval<V&>().first),
- typename S = decltype(std::declval<V&>().second)>
- static std::true_type test(int);
-
- template<typename...>
- static std::false_type test(...);
- };
-
- template <typename T, typename U = T, typename = decltype(std::declval<T&>() < std::declval<U&>())>
- std::true_type supports_op_less_test(const T&);
- std::false_type supports_op_less_test(...);
- template <typename T, typename U = T, typename = decltype(std::declval<T&>() == std::declval<U&>())>
- std::true_type supports_op_equal_test(const T&);
- std::false_type supports_op_equal_test(...);
- template <typename T, typename U = T, typename = decltype(std::declval<T&>() <= std::declval<U&>())>
- std::true_type supports_op_less_equal_test(const T&);
- std::false_type supports_op_less_equal_test(...);
-
- } // meta_detail
-
- template <typename T>
- using supports_op_less = decltype(meta_detail::supports_op_less_test(std::declval<T&>()));
- template <typename T>
- using supports_op_equal = decltype(meta_detail::supports_op_equal_test(std::declval<T&>()));
- template <typename T>
- using supports_op_less_equal = decltype(meta_detail::supports_op_less_equal_test(std::declval<T&>()));
-
- template<typename T>
- struct is_callable : boolean<meta_detail::is_callable<T>::value> {};
-
- template<typename T>
- struct has_begin_end : decltype(meta_detail::has_begin_end_impl::test<T>(0)) {};
-
- template<typename T>
- struct has_key_value_pair : decltype(meta_detail::has_key_value_pair_impl::test<T>(0)) {};
-
- template <typename T>
- using is_string_constructible = any<std::is_same<unqualified_t<T>, const char*>, std::is_same<unqualified_t<T>, char>, std::is_same<unqualified_t<T>, std::string>, std::is_same<unqualified_t<T>, std::initializer_list<char>>>;
-
- template <typename T>
- using is_c_str = any<
- std::is_same<std::decay_t<unqualified_t<T>>, const char*>,
- std::is_same<std::decay_t<unqualified_t<T>>, char*>,
- std::is_same<unqualified_t<T>, std::string>
- >;
-
- template <typename T>
- struct is_move_only : all<
- neg<std::is_reference<T>>,
- neg<std::is_copy_constructible<unqualified_t<T>>>,
- std::is_move_constructible<unqualified_t<T>>
- > {};
-
- template <typename T>
- using is_not_move_only = neg<is_move_only<T>>;
-
- namespace meta_detail {
- template <typename T, meta::disable<meta::is_specialization_of<std::tuple, meta::unqualified_t<T>>> = meta::enabler>
- decltype(auto) force_tuple(T&& x) {
- return std::forward_as_tuple(std::forward<T>(x));
- }
-
- template <typename T, meta::enable<meta::is_specialization_of<std::tuple, meta::unqualified_t<T>>> = meta::enabler>
- decltype(auto) force_tuple(T&& x) {
- return std::forward<T>(x);
- }
- } // meta_detail
-
- template <typename... X>
- decltype(auto) tuplefy(X&&... x) {
- return std::tuple_cat(meta_detail::force_tuple(std::forward<X>(x))...);
- }
- } // meta
- namespace detail {
- template <std::size_t I, typename Tuple>
- decltype(auto) forward_get(Tuple&& tuple) {
- return std::forward<meta::tuple_element_t<I, Tuple>>(std::get<I>(tuple));
- }
-
- template <std::size_t... I, typename Tuple>
- auto forward_tuple_impl(std::index_sequence<I...>, Tuple&& tuple) -> decltype(std::tuple<decltype(forward_get<I>(tuple))...>(forward_get<I>(tuple)...)) {
- return std::tuple<decltype(forward_get<I>(tuple))...>(std::move(std::get<I>(tuple))...);
- }
-
- template <typename Tuple>
- auto forward_tuple(Tuple&& tuple) {
- auto x = forward_tuple_impl(std::make_index_sequence<std::tuple_size<meta::unqualified_t<Tuple>>::value>(), std::forward<Tuple>(tuple));
- return x;
- }
-
- template<typename T>
- auto unwrap(T&& item) -> decltype(std::forward<T>(item)) {
- return std::forward<T>(item);
- }
-
- template<typename T>
- T& unwrap(std::reference_wrapper<T> arg) {
- return arg.get();
- }
-
- template<typename T>
- auto deref(T&& item) -> decltype(std::forward<T>(item)) {
- return std::forward<T>(item);
- }
-
- template<typename T>
- inline T& deref(T* item) {
- return *item;
- }
-
- template<typename T, typename Dx>
- inline std::add_lvalue_reference_t<T> deref(std::unique_ptr<T, Dx>& item) {
- return *item;
- }
-
- template<typename T>
- inline std::add_lvalue_reference_t<T> deref(std::shared_ptr<T>& item) {
- return *item;
- }
-
- template<typename T, typename Dx>
- inline std::add_lvalue_reference_t<T> deref(const std::unique_ptr<T, Dx>& item) {
- return *item;
- }
-
- template<typename T>
- inline std::add_lvalue_reference_t<T> deref(const std::shared_ptr<T>& item) {
- return *item;
- }
-
- template<typename T>
- inline T* ptr(T& val) {
- return std::addressof(val);
- }
-
- template<typename T>
- inline T* ptr(std::reference_wrapper<T> val) {
- return std::addressof(val.get());
- }
-
- template<typename T>
- inline T* ptr(T* val) {
- return val;
- }
- } // detail
-} // sol
-
-#endif // SOL_TRAITS_HPP