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author | 2020-11-15 03:53:47 +1100 | |
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committer | 2020-11-15 03:53:47 +1100 | |
commit | 55b8ca317ab1f77850f498c1523355e1f5dd8d03 (patch) | |
tree | bada7948236b18684609f47024cc9ca227a5ef89 /3rdparty/sol2/sol/optional_implementation.hpp | |
parent | 4db7f0439c3b841eb07d2320e39be38269e6cd56 (diff) |
-Switch to building MAME as C++17.
* Updated sol2 to 3.2.2
* Updated pugixml to 1.10
* Increased minimum clang version to 6
* Cleaned up some stuff that can use new features
Diffstat (limited to '3rdparty/sol2/sol/optional_implementation.hpp')
-rw-r--r-- | 3rdparty/sol2/sol/optional_implementation.hpp | 1135 |
1 files changed, 0 insertions, 1135 deletions
diff --git a/3rdparty/sol2/sol/optional_implementation.hpp b/3rdparty/sol2/sol/optional_implementation.hpp deleted file mode 100644 index 4ffd0f27cd8..00000000000 --- a/3rdparty/sol2/sol/optional_implementation.hpp +++ /dev/null @@ -1,1135 +0,0 @@ -// 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. - -// Copyright (C) 2011 - 2012 Andrzej Krzemienski. -// Use, modification, and distribution is subject to the Boost Software -// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at -// http://www.boost.org/LICENSE_1_0.txt) -// -// The idea and interface is based on Boost.Optional library -// authored by Fernando Luis Cacciola Carballal - -# ifndef SOL_OPTIONAL_IMPLEMENTATION_HPP -# define SOL_OPTIONAL_IMPLEMENTATION_HPP - -# include <utility> -# include <type_traits> -# include <initializer_list> -# include <cassert> -# include <functional> -# include <string> -# include <stdexcept> -#ifdef SOL_NO_EXCEPTIONS -#include <cstdlib> -#endif // Exceptions - -# define TR2_OPTIONAL_REQUIRES(...) typename ::std::enable_if<__VA_ARGS__::value, bool>::type = false - -# if defined __GNUC__ // NOTE: GNUC is also defined for Clang -# if (__GNUC__ >= 5) -# define TR2_OPTIONAL_GCC_5_0_AND_HIGHER___ -# define TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ -# elif (__GNUC__ == 4) && (__GNUC_MINOR__ >= 8) -# define TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ -# elif (__GNUC__ > 4) -# define TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ -# endif -# -# if (__GNUC__ == 4) && (__GNUC_MINOR__ >= 7) -# define TR2_OPTIONAL_GCC_4_7_AND_HIGHER___ -# elif (__GNUC__ > 4) -# define TR2_OPTIONAL_GCC_4_7_AND_HIGHER___ -# endif -# -# if (__GNUC__ == 4) && (__GNUC_MINOR__ == 8) && (__GNUC_PATCHLEVEL__ >= 1) -# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ -# elif (__GNUC__ == 4) && (__GNUC_MINOR__ >= 9) -# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ -# elif (__GNUC__ > 4) -# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ -# endif -# endif -# -# if defined __clang_major__ -# if (__clang_major__ == 3 && __clang_minor__ >= 5) -# define TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ -# elif (__clang_major__ > 3) -# define TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ -# endif -# if defined TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ -# define TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ -# elif (__clang_major__ == 3 && __clang_minor__ == 4 && __clang_patchlevel__ >= 2) -# define TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ -# endif -# endif -# -# if defined _MSC_VER -# if (_MSC_VER >= 1900) -# define TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ -# endif -# endif - -# if defined __clang__ -# if (__clang_major__ > 2) || (__clang_major__ == 2) && (__clang_minor__ >= 9) -# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 -# else -# define OPTIONAL_HAS_THIS_RVALUE_REFS 0 -# endif -# elif defined TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ -# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 -# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ -# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 -# else -# define OPTIONAL_HAS_THIS_RVALUE_REFS 0 -# endif - - -# if defined TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ -# define OPTIONAL_HAS_CONSTEXPR_INIT_LIST 1 -# define OPTIONAL_CONSTEXPR_INIT_LIST constexpr -# else -# define OPTIONAL_HAS_CONSTEXPR_INIT_LIST 0 -# define OPTIONAL_CONSTEXPR_INIT_LIST -# endif - -# if defined(TR2_OPTIONAL_MSVC_2015_AND_HIGHER___) || (defined TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ && (defined __cplusplus) && (__cplusplus != 201103L)) -# define OPTIONAL_HAS_MOVE_ACCESSORS 1 -# else -# define OPTIONAL_HAS_MOVE_ACCESSORS 0 -# endif - -# // In C++11 constexpr implies const, so we need to make non-const members also non-constexpr -# if defined(TR2_OPTIONAL_MSVC_2015_AND_HIGHER___) || ((defined __cplusplus) && (__cplusplus == 201103L)) -# define OPTIONAL_MUTABLE_CONSTEXPR -# else -# define OPTIONAL_MUTABLE_CONSTEXPR constexpr -# endif - -# if defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ -#pragma warning( push ) -#pragma warning( disable : 4814 ) -#endif - -namespace sol { - - // BEGIN workaround for missing is_trivially_destructible -# if defined TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ - // leave it: it is already there -# elif defined TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ - // leave it: it is already there -# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ - // leave it: it is already there -# elif defined TR2_OPTIONAL_DISABLE_EMULATION_OF_TYPE_TRAITS - // leave it: the user doesn't want it -# else - template <typename T> - using is_trivially_destructible = ::std::has_trivial_destructor<T>; -# endif - // END workaround for missing is_trivially_destructible - -# if (defined TR2_OPTIONAL_GCC_4_7_AND_HIGHER___) - // leave it; our metafunctions are already defined. -# elif defined TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ - // leave it; our metafunctions are already defined. -# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ - // leave it: it is already there -# elif defined TR2_OPTIONAL_DISABLE_EMULATION_OF_TYPE_TRAITS - // leave it: the user doesn't want it -# else - - -// workaround for missing traits in GCC and CLANG - template <class T> - struct is_nothrow_move_constructible - { - constexpr static bool value = ::std::is_nothrow_constructible<T, T&&>::value; - }; - - - template <class T, class U> - struct is_assignable - { - template <class X, class Y> - constexpr static bool has_assign(...) { return false; } - - template <class X, class Y, size_t S = sizeof((::std::declval<X>() = ::std::declval<Y>(), true)) > - // the comma operator is necessary for the cases where operator= returns void - constexpr static bool has_assign(bool) { return true; } - - constexpr static bool value = has_assign<T, U>(true); - }; - - - template <class T> - struct is_nothrow_move_assignable - { - template <class X, bool has_any_move_assign> - struct has_nothrow_move_assign { - constexpr static bool value = false; - }; - - template <class X> - struct has_nothrow_move_assign<X, true> { - constexpr static bool value = noexcept(::std::declval<X&>() = ::std::declval<X&&>()); - }; - - constexpr static bool value = has_nothrow_move_assign<T, is_assignable<T&, T&&>::value>::value; - }; - // end workaround - - -# endif - - - -// 20.5.4, optional for object types - template <class T> class optional; - - // 20.5.5, optional for lvalue reference types - template <class T> class optional<T&>; - - - // workaround: std utility functions aren't constexpr yet - template <class T> inline constexpr T&& constexpr_forward(typename ::std::remove_reference<T>::type& t) noexcept - { - return static_cast<T&&>(t); - } - - template <class T> inline constexpr T&& constexpr_forward(typename ::std::remove_reference<T>::type&& t) noexcept - { - static_assert(!::std::is_lvalue_reference<T>::value, "!!"); - return static_cast<T&&>(t); - } - - template <class T> inline constexpr typename ::std::remove_reference<T>::type&& constexpr_move(T&& t) noexcept - { - return static_cast<typename ::std::remove_reference<T>::type&&>(t); - } - - -#if defined NDEBUG -# define TR2_OPTIONAL_ASSERTED_EXPRESSION(CHECK, EXPR) (EXPR) -#else -# define TR2_OPTIONAL_ASSERTED_EXPRESSION(CHECK, EXPR) ((CHECK) ? (EXPR) : ([]{assert(!#CHECK);}(), (EXPR))) -#endif - - - namespace detail_ - { - - // static_addressof: a constexpr version of addressof - template <typename T> - struct has_overloaded_addressof - { - template <class X> - constexpr static bool has_overload(...) { return false; } - - template <class X, size_t S = sizeof(::std::declval<X&>().operator&()) > - constexpr static bool has_overload(bool) { return true; } - - constexpr static bool value = has_overload<T>(true); - }; - - template <typename T, TR2_OPTIONAL_REQUIRES(!has_overloaded_addressof<T>)> - constexpr T* static_addressof(T& ref) - { - return &ref; - } - - template <typename T, TR2_OPTIONAL_REQUIRES(has_overloaded_addressof<T>)> - T* static_addressof(T& ref) - { - return ::std::addressof(ref); - } - - - // the call to convert<A>(b) has return type A and converts b to type A iff b decltype(b) is implicitly convertible to A - template <class U> - constexpr U convert(U v) { return v; } - - } // namespace detail_ - - constexpr struct trivial_init_t {} trivial_init{}; - - // 20.5.7, Disengaged state indicator - struct nullopt_t - { - struct init {}; - constexpr explicit nullopt_t(init) {} - }; - constexpr nullopt_t nullopt{ nullopt_t::init() }; - - - // 20.5.8, class bad_optional_access - class bad_optional_access : public ::std::logic_error { - public: - explicit bad_optional_access(const ::std::string& what_arg) : ::std::logic_error{ what_arg } {} - explicit bad_optional_access(const char* what_arg) : ::std::logic_error{ what_arg } {} - }; - - - template <class T> - struct alignas(T) optional_base { - char storage_[sizeof(T)]; - bool init_; - - constexpr optional_base() noexcept : storage_(), init_(false) {}; - - explicit optional_base(const T& v) : storage_(), init_(true) { - new (&storage())T(v); - } - - explicit optional_base(T&& v) : storage_(), init_(true) { - new (&storage())T(constexpr_move(v)); - } - - template <class... Args> explicit optional_base(in_place_t, Args&&... args) - : init_(true), storage_() { - new (&storage())T(constexpr_forward<Args>(args)...); - } - - template <class U, class... Args, TR2_OPTIONAL_REQUIRES(::std::is_constructible<T, ::std::initializer_list<U>>)> - explicit optional_base(in_place_t, ::std::initializer_list<U> il, Args&&... args) - : init_(true), storage_() { - new (&storage())T(il, constexpr_forward<Args>(args)...); - } -#if defined __GNUC__ -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wstrict-aliasing" -#endif - T& storage() { - return *reinterpret_cast<T*>(&storage_[0]); - } - - constexpr const T& storage() const { - return *reinterpret_cast<T const*>(&storage_[0]); - } -#if defined __GNUC__ -#pragma GCC diagnostic pop -#endif - - ~optional_base() { if (init_) { storage().T::~T(); } } - }; - -#if defined __GNUC__ && !defined TR2_OPTIONAL_GCC_5_0_AND_HIGHER___ - // Sorry, GCC 4.x; you're just a piece of shit - template <typename T> - using constexpr_optional_base = optional_base<T>; -#else - template <class T> - struct alignas(T) constexpr_optional_base { - char storage_[sizeof(T)]; - bool init_; - constexpr constexpr_optional_base() noexcept : storage_(), init_(false) {} - - explicit constexpr constexpr_optional_base(const T& v) : storage_(), init_(true) { - new (&storage())T(v); - } - - explicit constexpr constexpr_optional_base(T&& v) : storage_(), init_(true) { - new (&storage())T(constexpr_move(v)); - } - - template <class... Args> explicit constexpr constexpr_optional_base(in_place_t, Args&&... args) - : init_(true), storage_() { - new (&storage())T(constexpr_forward<Args>(args)...); - } - - template <class U, class... Args, TR2_OPTIONAL_REQUIRES(::std::is_constructible<T, ::std::initializer_list<U>>)> - OPTIONAL_CONSTEXPR_INIT_LIST explicit constexpr_optional_base(in_place_t, ::std::initializer_list<U> il, Args&&... args) - : init_(true), storage_() { - new (&storage())T(il, constexpr_forward<Args>(args)...); - } - -#if defined __GNUC__ -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wstrict-aliasing" -#endif - T& storage() { - return (*reinterpret_cast<T*>(&storage_[0])); - } - - constexpr const T& storage() const { - return (*reinterpret_cast<T const*>(&storage_[0])); - } -#if defined __GNUC__ -#pragma GCC diagnostic pop -#endif - - ~constexpr_optional_base() = default; - }; -#endif - - template <class T> - using OptionalBase = typename ::std::conditional< - ::std::is_trivially_destructible<T>::value, - constexpr_optional_base<typename ::std::remove_const<T>::type>, - optional_base<typename ::std::remove_const<T>::type> - >::type; - - - - template <class T> - class optional : private OptionalBase<T> - { - static_assert(!::std::is_same<typename ::std::decay<T>::type, nullopt_t>::value, "bad T"); - static_assert(!::std::is_same<typename ::std::decay<T>::type, in_place_t>::value, "bad T"); - - - constexpr bool initialized() const noexcept { return OptionalBase<T>::init_; } - typename ::std::remove_const<T>::type* dataptr() { return ::std::addressof(OptionalBase<T>::storage()); } - constexpr const T* dataptr() const { return detail_::static_addressof(OptionalBase<T>::storage()); } - -# if OPTIONAL_HAS_THIS_RVALUE_REFS == 1 - constexpr const T& contained_val() const& { return OptionalBase<T>::storage(); } -# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 - OPTIONAL_MUTABLE_CONSTEXPR T&& contained_val() && { return ::std::move(OptionalBase<T>::storage()); } - OPTIONAL_MUTABLE_CONSTEXPR T& contained_val() & { return OptionalBase<T>::storage(); } -# else - T& contained_val() & { return OptionalBase<T>::storage(); } - T&& contained_val() && { return ::std::move(OptionalBase<T>::storage()); } -# endif -# else - constexpr const T& contained_val() const { return OptionalBase<T>::storage(); } - T& contained_val() { return OptionalBase<T>::storage(); } -# endif - - void clear() noexcept { - if (initialized()) dataptr()->T::~T(); - OptionalBase<T>::init_ = false; - } - - template <class... Args> - void initialize(Args&&... args) noexcept(noexcept(T(::std::forward<Args>(args)...))) - { - assert(!OptionalBase<T>::init_); - ::new (static_cast<void*>(dataptr())) T(::std::forward<Args>(args)...); - OptionalBase<T>::init_ = true; - } - - template <class U, class... Args> - void initialize(::std::initializer_list<U> il, Args&&... args) noexcept(noexcept(T(il, ::std::forward<Args>(args)...))) - { - assert(!OptionalBase<T>::init_); - ::new (static_cast<void*>(dataptr())) T(il, ::std::forward<Args>(args)...); - OptionalBase<T>::init_ = true; - } - - public: - typedef T value_type; - - // 20.5.5.1, constructors - constexpr optional() noexcept : OptionalBase<T>() {}; - constexpr optional(nullopt_t) noexcept : OptionalBase<T>() {}; - - optional(const optional& rhs) - : OptionalBase<T>() - { - if (rhs.initialized()) { - ::new (static_cast<void*>(dataptr())) T(*rhs); - OptionalBase<T>::init_ = true; - } - } - - optional(const optional<T&>& rhs) : optional() - { - if (rhs) { - ::new (static_cast<void*>(dataptr())) T(*rhs); - OptionalBase<T>::init_ = true; - } - } - - - optional(optional&& rhs) noexcept(::std::is_nothrow_move_constructible<T>::value) - : OptionalBase<T>() - { - if (rhs.initialized()) { - ::new (static_cast<void*>(dataptr())) T(::std::move(*rhs)); - OptionalBase<T>::init_ = true; - } - } - - constexpr optional(const T& v) : OptionalBase<T>(v) {} - - constexpr optional(T&& v) : OptionalBase<T>(constexpr_move(v)) {} - - template <class... Args> - explicit constexpr optional(in_place_t, Args&&... args) - : OptionalBase<T>(in_place, constexpr_forward<Args>(args)...) {} - - template <class U, class... Args, TR2_OPTIONAL_REQUIRES(::std::is_constructible<T, ::std::initializer_list<U>>)> - OPTIONAL_CONSTEXPR_INIT_LIST explicit optional(in_place_t, ::std::initializer_list<U> il, Args&&... args) - : OptionalBase<T>(in_place, il, constexpr_forward<Args>(args)...) {} - - // 20.5.4.2, Destructor - ~optional() = default; - - // 20.5.4.3, assignment - optional& operator=(nullopt_t) noexcept - { - clear(); - return *this; - } - - optional& operator=(const optional& rhs) - { - if (initialized() == true && rhs.initialized() == false) clear(); - else if (initialized() == false && rhs.initialized() == true) initialize(*rhs); - else if (initialized() == true && rhs.initialized() == true) contained_val() = *rhs; - return *this; - } - - optional& operator=(optional&& rhs) - noexcept(::std::is_nothrow_move_assignable<T>::value && ::std::is_nothrow_move_constructible<T>::value) - { - if (initialized() == true && rhs.initialized() == false) clear(); - else if (initialized() == false && rhs.initialized() == true) initialize(::std::move(*rhs)); - else if (initialized() == true && rhs.initialized() == true) contained_val() = ::std::move(*rhs); - return *this; - } - - template <class U> - auto operator=(U&& v) - -> typename ::std::enable_if - < - ::std::is_same<typename ::std::decay<U>::type, T>::value, - optional& - >::type - { - if (initialized()) { contained_val() = ::std::forward<U>(v); } - else { initialize(::std::forward<U>(v)); } - return *this; - } - - - template <class... Args> - void emplace(Args&&... args) - { - clear(); - initialize(::std::forward<Args>(args)...); - } - - template <class U, class... Args> - void emplace(::std::initializer_list<U> il, Args&&... args) - { - clear(); - initialize<U, Args...>(il, ::std::forward<Args>(args)...); - } - - // 20.5.4.4, Swap - void swap(optional<T>& rhs) noexcept(::std::is_nothrow_move_constructible<T>::value && noexcept(swap(::std::declval<T&>(), ::std::declval<T&>()))) - { - if (initialized() == true && rhs.initialized() == false) { rhs.initialize(::std::move(**this)); clear(); } - else if (initialized() == false && rhs.initialized() == true) { initialize(::std::move(*rhs)); rhs.clear(); } - else if (initialized() == true && rhs.initialized() == true) { using ::std::swap; swap(**this, *rhs); } - } - - // 20.5.4.5, Observers - - explicit constexpr operator bool() const noexcept { return initialized(); } - - constexpr T const* operator ->() const { - return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), dataptr()); - } - -# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 - - OPTIONAL_MUTABLE_CONSTEXPR T* operator ->() { - assert(initialized()); - return dataptr(); - } - - constexpr T const& operator *() const& { - return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), contained_val()); - } - - OPTIONAL_MUTABLE_CONSTEXPR T& operator *() & { - assert(initialized()); - return contained_val(); - } - - OPTIONAL_MUTABLE_CONSTEXPR T&& operator *() && { - assert(initialized()); - return constexpr_move(contained_val()); - } - - constexpr T const& value() const& { - return initialized() ? - contained_val() -#ifdef SOL_NO_EXCEPTIONS - // we can't abort here - // because there's no constexpr abort - : *(T*)nullptr; -#else - : (throw bad_optional_access("bad optional access"), contained_val()); -#endif - } - - OPTIONAL_MUTABLE_CONSTEXPR T& value() & { - return initialized() ? - contained_val() -#ifdef SOL_NO_EXCEPTIONS - : *(T*)nullptr; -#else - : (throw bad_optional_access("bad optional access"), contained_val()); -#endif - } - - OPTIONAL_MUTABLE_CONSTEXPR T&& value() && { - return initialized() ? - contained_val() -#ifdef SOL_NO_EXCEPTIONS - // we can't abort here - // because there's no constexpr abort - : std::move(*(T*)nullptr); -#else - : (throw bad_optional_access("bad optional access"), contained_val()); -#endif - } - -# else - - T* operator ->() { - assert(initialized()); - return dataptr(); - } - - constexpr T const& operator *() const { - return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), contained_val()); - } - - T& operator *() { - assert(initialized()); - return contained_val(); - } - - constexpr T const& value() const { - return initialized() ? - contained_val() -#ifdef SOL_NO_EXCEPTIONS - // we can't abort here - // because there's no constexpr abort - : *(T*)nullptr; -#else - : (throw bad_optional_access("bad optional access"), contained_val()); -#endif - } - - T& value() { - return initialized() ? - contained_val() -#ifdef SOL_NO_EXCEPTIONS - // we can abort here - // but the others are constexpr, so we can't... - : (std::abort(), *(T*)nullptr); -#else - : (throw bad_optional_access("bad optional access"), contained_val()); -#endif - } - -# endif - -# if OPTIONAL_HAS_THIS_RVALUE_REFS == 1 - - template <class V> - constexpr T value_or(V&& v) const& - { - return *this ? **this : detail_::convert<T>(constexpr_forward<V>(v)); - } - -# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 - - template <class V> - OPTIONAL_MUTABLE_CONSTEXPR T value_or(V&& v) && - { - return *this ? constexpr_move(const_cast<optional<T>&>(*this).contained_val()) : detail_::convert<T>(constexpr_forward<V>(v)); - } - -# else - - template <class V> - T value_or(V&& v) && - { - return *this ? constexpr_move(const_cast<optional<T>&>(*this).contained_val()) : detail_::convert<T>(constexpr_forward<V>(v)); - } - -# endif - -# else - - template <class V> - constexpr T value_or(V&& v) const - { - return *this ? **this : detail_::convert<T>(constexpr_forward<V>(v)); - } - -# endif - - }; - - - template <class T> - class optional<T&> - { - static_assert(!::std::is_same<T, nullopt_t>::value, "bad T"); - static_assert(!::std::is_same<T, in_place_t>::value, "bad T"); - T* ref; - - public: - - // 20.5.5.1, construction/destruction - constexpr optional() noexcept : ref(nullptr) {} - - constexpr optional(nullopt_t) noexcept : ref(nullptr) {} - - constexpr optional(T& v) noexcept : ref(detail_::static_addressof(v)) {} - - optional(T&&) = delete; - - constexpr optional(const optional& rhs) noexcept : ref(rhs.ref) {} - - explicit constexpr optional(in_place_t, T& v) noexcept : ref(detail_::static_addressof(v)) {} - - explicit optional(in_place_t, T&&) = delete; - - ~optional() = default; - - // 20.5.5.2, mutation - optional& operator=(nullopt_t) noexcept { - ref = nullptr; - return *this; - } - - // optional& operator=(const optional& rhs) noexcept { - // ref = rhs.ref; - // return *this; - // } - - // optional& operator=(optional&& rhs) noexcept { - // ref = rhs.ref; - // return *this; - // } - - template <typename U> - auto operator=(U&& rhs) noexcept - -> typename ::std::enable_if - < - ::std::is_same<typename ::std::decay<U>::type, optional<T&>>::value, - optional& - >::type - { - ref = rhs.ref; - return *this; - } - - template <typename U> - auto operator=(U&& rhs) noexcept - -> typename ::std::enable_if - < - !::std::is_same<typename ::std::decay<U>::type, optional<T&>>::value, - optional& - >::type - = delete; - - void emplace(T& v) noexcept { - ref = detail_::static_addressof(v); - } - - void emplace(T&&) = delete; - - - void swap(optional<T&>& rhs) noexcept - { - ::std::swap(ref, rhs.ref); - } - - // 20.5.5.3, observers - constexpr T* operator->() const { - return TR2_OPTIONAL_ASSERTED_EXPRESSION(ref, ref); - } - - constexpr T& operator*() const { - return TR2_OPTIONAL_ASSERTED_EXPRESSION(ref, *ref); - } - - constexpr T& value() const { - return ref ? - *ref -#ifdef SOL_NO_EXCEPTIONS - // we can't abort here - // because there's no constexpr abort - : *(T*)nullptr; -#else - : throw bad_optional_access("bad optional access"); -#endif - } - - explicit constexpr operator bool() const noexcept { - return ref != nullptr; - } - - template <typename V> - constexpr T& value_or(V&& v) const - { - return *this ? **this : detail_::convert<T&>(constexpr_forward<V>(v)); - } - }; - - - template <class T> - class optional<T&&> - { - static_assert(sizeof(T) == 0, "optional rvalue references disallowed"); - }; - - - // 20.5.8, Relational operators - template <class T> constexpr bool operator==(const optional<T>& x, const optional<T>& y) - { - return bool(x) != bool(y) ? false : bool(x) == false ? true : *x == *y; - } - - template <class T> constexpr bool operator!=(const optional<T>& x, const optional<T>& y) - { - return !(x == y); - } - - template <class T> constexpr bool operator<(const optional<T>& x, const optional<T>& y) - { - return (!y) ? false : (!x) ? true : *x < *y; - } - - template <class T> constexpr bool operator>(const optional<T>& x, const optional<T>& y) - { - return (y < x); - } - - template <class T> constexpr bool operator<=(const optional<T>& x, const optional<T>& y) - { - return !(y < x); - } - - template <class T> constexpr bool operator>=(const optional<T>& x, const optional<T>& y) - { - return !(x < y); - } - - - // 20.5.9, Comparison with nullopt - template <class T> constexpr bool operator==(const optional<T>& x, nullopt_t) noexcept - { - return (!x); - } - - template <class T> constexpr bool operator==(nullopt_t, const optional<T>& x) noexcept - { - return (!x); - } - - template <class T> constexpr bool operator!=(const optional<T>& x, nullopt_t) noexcept - { - return bool(x); - } - - template <class T> constexpr bool operator!=(nullopt_t, const optional<T>& x) noexcept - { - return bool(x); - } - - template <class T> constexpr bool operator<(const optional<T>&, nullopt_t) noexcept - { - return false; - } - - template <class T> constexpr bool operator<(nullopt_t, const optional<T>& x) noexcept - { - return bool(x); - } - - template <class T> constexpr bool operator<=(const optional<T>& x, nullopt_t) noexcept - { - return (!x); - } - - template <class T> constexpr bool operator<=(nullopt_t, const optional<T>&) noexcept - { - return true; - } - - template <class T> constexpr bool operator>(const optional<T>& x, nullopt_t) noexcept - { - return bool(x); - } - - template <class T> constexpr bool operator>(nullopt_t, const optional<T>&) noexcept - { - return false; - } - - template <class T> constexpr bool operator>=(const optional<T>&, nullopt_t) noexcept - { - return true; - } - - template <class T> constexpr bool operator>=(nullopt_t, const optional<T>& x) noexcept - { - return (!x); - } - - - - // 20.5.10, Comparison with T - template <class T> constexpr bool operator==(const optional<T>& x, const T& v) - { - return bool(x) ? *x == v : false; - } - - template <class T> constexpr bool operator==(const T& v, const optional<T>& x) - { - return bool(x) ? v == *x : false; - } - - template <class T> constexpr bool operator!=(const optional<T>& x, const T& v) - { - return bool(x) ? *x != v : true; - } - - template <class T> constexpr bool operator!=(const T& v, const optional<T>& x) - { - return bool(x) ? v != *x : true; - } - - template <class T> constexpr bool operator<(const optional<T>& x, const T& v) - { - return bool(x) ? *x < v : true; - } - - template <class T> constexpr bool operator>(const T& v, const optional<T>& x) - { - return bool(x) ? v > *x : true; - } - - template <class T> constexpr bool operator>(const optional<T>& x, const T& v) - { - return bool(x) ? *x > v : false; - } - - template <class T> constexpr bool operator<(const T& v, const optional<T>& x) - { - return bool(x) ? v < *x : false; - } - - template <class T> constexpr bool operator>=(const optional<T>& x, const T& v) - { - return bool(x) ? *x >= v : false; - } - - template <class T> constexpr bool operator<=(const T& v, const optional<T>& x) - { - return bool(x) ? v <= *x : false; - } - - template <class T> constexpr bool operator<=(const optional<T>& x, const T& v) - { - return bool(x) ? *x <= v : true; - } - - template <class T> constexpr bool operator>=(const T& v, const optional<T>& x) - { - return bool(x) ? v >= *x : true; - } - - - // Comparison of optional<T&> with T - template <class T> constexpr bool operator==(const optional<T&>& x, const T& v) - { - return bool(x) ? *x == v : false; - } - - template <class T> constexpr bool operator==(const T& v, const optional<T&>& x) - { - return bool(x) ? v == *x : false; - } - - template <class T> constexpr bool operator!=(const optional<T&>& x, const T& v) - { - return bool(x) ? *x != v : true; - } - - template <class T> constexpr bool operator!=(const T& v, const optional<T&>& x) - { - return bool(x) ? v != *x : true; - } - - template <class T> constexpr bool operator<(const optional<T&>& x, const T& v) - { - return bool(x) ? *x < v : true; - } - - template <class T> constexpr bool operator>(const T& v, const optional<T&>& x) - { - return bool(x) ? v > *x : true; - } - - template <class T> constexpr bool operator>(const optional<T&>& x, const T& v) - { - return bool(x) ? *x > v : false; - } - - template <class T> constexpr bool operator<(const T& v, const optional<T&>& x) - { - return bool(x) ? v < *x : false; - } - - template <class T> constexpr bool operator>=(const optional<T&>& x, const T& v) - { - return bool(x) ? *x >= v : false; - } - - template <class T> constexpr bool operator<=(const T& v, const optional<T&>& x) - { - return bool(x) ? v <= *x : false; - } - - template <class T> constexpr bool operator<=(const optional<T&>& x, const T& v) - { - return bool(x) ? *x <= v : true; - } - - template <class T> constexpr bool operator>=(const T& v, const optional<T&>& x) - { - return bool(x) ? v >= *x : true; - } - - // Comparison of optional<T const&> with T - template <class T> constexpr bool operator==(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x == v : false; - } - - template <class T> constexpr bool operator==(const T& v, const optional<const T&>& x) - { - return bool(x) ? v == *x : false; - } - - template <class T> constexpr bool operator!=(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x != v : true; - } - - template <class T> constexpr bool operator!=(const T& v, const optional<const T&>& x) - { - return bool(x) ? v != *x : true; - } - - template <class T> constexpr bool operator<(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x < v : true; - } - - template <class T> constexpr bool operator>(const T& v, const optional<const T&>& x) - { - return bool(x) ? v > *x : true; - } - - template <class T> constexpr bool operator>(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x > v : false; - } - - template <class T> constexpr bool operator<(const T& v, const optional<const T&>& x) - { - return bool(x) ? v < *x : false; - } - - template <class T> constexpr bool operator>=(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x >= v : false; - } - - template <class T> constexpr bool operator<=(const T& v, const optional<const T&>& x) - { - return bool(x) ? v <= *x : false; - } - - template <class T> constexpr bool operator<=(const optional<const T&>& x, const T& v) - { - return bool(x) ? *x <= v : true; - } - - template <class T> constexpr bool operator>=(const T& v, const optional<const T&>& x) - { - return bool(x) ? v >= *x : true; - } - - - // 20.5.12, Specialized algorithms - template <class T> - void swap(optional<T>& x, optional<T>& y) noexcept(noexcept(x.swap(y))) { - x.swap(y); - } - - - template <class T> - constexpr optional<typename ::std::decay<T>::type> make_optional(T&& v) { - return optional<typename ::std::decay<T>::type>(constexpr_forward<T>(v)); - } - - template <class X> - constexpr optional<X&> make_optional(::std::reference_wrapper<X> v) { - return optional<X&>(v.get()); - } - - -} // namespace - -namespace std -{ - template <typename T> - struct hash<sol::optional<T>> { - typedef typename hash<T>::result_type result_type; - typedef sol::optional<T> argument_type; - - constexpr result_type operator()(argument_type const& arg) const { - return arg ? ::std::hash<T>{}(*arg) : result_type{}; - } - }; - - template <typename T> - struct hash<sol::optional<T&>> { - typedef typename hash<T>::result_type result_type; - typedef sol::optional<T&> argument_type; - - constexpr result_type operator()(argument_type const& arg) const { - return arg ? ::std::hash<T>{}(*arg) : result_type{}; - } - }; -} - -# if defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ -#pragma warning( pop ) -#endif - - -# undef TR2_OPTIONAL_REQUIRES -# undef TR2_OPTIONAL_ASSERTED_EXPRESSION - -# endif // SOL_OPTIONAL_IMPLEMENTATION_HPP |