// sol3 // The MIT License (MIT) // Copyright (c) 2013-2018 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_BIND_TRAITS_HPP #define SOL_BIND_TRAITS_HPP #include "feature_test.hpp" #include "tuple.hpp" namespace sol { namespace meta { namespace meta_detail { template <class F> struct check_deducible_signature { struct nat {}; template <class G> static auto test(int) -> decltype(&G::operator(), void()); template <class> static auto test(...) -> nat; using type = std::is_void<decltype(test<F>(0))>; }; } // namespace meta_detail template <class F> struct has_deducible_signature : meta_detail::check_deducible_signature<F>::type {}; namespace meta_detail { template <std::size_t I, typename T> struct void_tuple_element : meta::tuple_element<I, T> {}; template <std::size_t I> struct void_tuple_element<I, std::tuple<>> { typedef void type; }; template <std::size_t I, typename T> using void_tuple_element_t = typename void_tuple_element<I, T>::type; template <bool it_is_noexcept, bool has_c_variadic, typename T, typename R, typename... Args> struct basic_traits { private: typedef std::conditional_t<std::is_void<T>::value, int, T>& first_type; public: static const bool is_noexcept = it_is_noexcept; static const bool is_member_function = std::is_void<T>::value; static const bool has_c_var_arg = has_c_variadic; static const std::size_t arity = sizeof...(Args); static const std::size_t free_arity = sizeof...(Args) + static_cast<std::size_t>(!std::is_void<T>::value); typedef types<Args...> args_list; typedef std::tuple<Args...> args_tuple; typedef T object_type; typedef R return_type; typedef tuple_types<R> returns_list; typedef R(function_type)(Args...); typedef std::conditional_t<std::is_void<T>::value, args_list, types<first_type, Args...>> free_args_list; typedef std::conditional_t<std::is_void<T>::value, R(Args...), R(first_type, Args...)> free_function_type; typedef std::conditional_t<std::is_void<T>::value, R (*)(Args...), R (*)(first_type, Args...)> free_function_pointer_type; typedef std::remove_pointer_t<free_function_pointer_type> signature_type; template <std::size_t i> using arg_at = void_tuple_element_t<i, args_tuple>; }; template <typename Signature, bool b = has_deducible_signature<Signature>::value> struct fx_traits : basic_traits<false, false, void, void> {}; // Free Functions template <typename R, typename... Args> struct fx_traits<R(Args...), false> : basic_traits<false, false, void, R, Args...> { typedef R (*function_pointer_type)(Args...); }; template <typename R, typename... Args> struct fx_traits<R (*)(Args...), false> : basic_traits<false, false, void, R, Args...> { typedef R (*function_pointer_type)(Args...); }; template <typename R, typename... Args> struct fx_traits<R(Args..., ...), false> : basic_traits<false, true, void, R, Args...> { typedef R (*function_pointer_type)(Args..., ...); }; template <typename R, typename... Args> struct fx_traits<R (*)(Args..., ...), false> : basic_traits<false, true, void, R, Args...> { typedef R (*function_pointer_type)(Args..., ...); }; // Member Functions /* C-Style Variadics */ template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...), false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...); }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...), false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...); }; /* Const Volatile */ template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile; }; /* Member Function Qualifiers */ template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...)&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) &; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...)&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) &; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...)&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) &&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...)&&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) &&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const&&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const&&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const&&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile&&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile&&, false> : basic_traits<false, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile&&; }; #if defined(SOL_NOEXCEPT_FUNCTION_TYPE) && SOL_NOEXCEPT_FUNCTION_TYPE template <typename R, typename... Args> struct fx_traits<R(Args...) noexcept, false> : basic_traits<true, false, void, R, Args...> { typedef R (*function_pointer_type)(Args...) noexcept; }; template <typename R, typename... Args> struct fx_traits<R (*)(Args...) noexcept, false> : basic_traits<true, false, void, R, Args...> { typedef R (*function_pointer_type)(Args...) noexcept; }; template <typename R, typename... Args> struct fx_traits<R(Args..., ...) noexcept, false> : basic_traits<true, true, void, R, Args...> { typedef R (*function_pointer_type)(Args..., ...) noexcept; }; template <typename R, typename... Args> struct fx_traits<R (*)(Args..., ...) noexcept, false> : basic_traits<true, true, void, R, Args...> { typedef R (*function_pointer_type)(Args..., ...) noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) noexcept; }; /* Const Volatile */ template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) & noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) & noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) & noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) & noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) && noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) && noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) && noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) && noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const&& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const&& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const&& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const&& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args...) const volatile&& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (T::*function_pointer_type)(Args...) const volatile&& noexcept; }; template <typename T, typename R, typename... Args> struct fx_traits<R (T::*)(Args..., ...) const volatile&& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (T::*function_pointer_type)(Args..., ...) const volatile&& noexcept; }; #endif // noexcept is part of a function's type #if defined(_MSC_VER) && defined(_M_IX86) template <typename R, typename... Args> struct fx_traits<R __stdcall(Args...), false> : basic_traits<false, false, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args...); }; template <typename R, typename... Args> struct fx_traits<R(__stdcall*)(Args...), false> : basic_traits<false, false, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args...); }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...), false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...); }; /* Const Volatile */ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile; }; /* Member Function Qualifiers */ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...)&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) &; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...)&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) &&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const&&; }; template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile&&, false> : basic_traits<false, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile&&; }; #if defined(SOL_NOEXCEPT_FUNCTION_TYPE) && SOL_NOEXCEPT_FUNCTION_TYPE template <typename R, typename... Args> struct fx_traits<R __stdcall(Args...) noexcept, false> : basic_traits<true, false, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args...) noexcept; }; template <typename R, typename... Args> struct fx_traits<R (__stdcall *)(Args...) noexcept, false> : basic_traits<true, false, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args...) noexcept; }; /* __stdcall cannot be applied to functions with varargs*/ /*template <typename R, typename... Args> struct fx_traits<__stdcall R(Args..., ...) noexcept, false> : basic_traits<true, true, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args..., ...) noexcept; }; template <typename R, typename... Args> struct fx_traits<R (__stdcall *)(Args..., ...) noexcept, false> : basic_traits<true, true, void, R, Args...> { typedef R(__stdcall* function_pointer_type)(Args..., ...) noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) noexcept; };*/ /* Const Volatile */ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const volatile noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const volatile noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) & noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) & noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) & noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) & noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const& noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const& noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile& noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const volatile& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const volatile& noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) && noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) && noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) && noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) && noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const&& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const&& noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const&& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const&& noexcept; };*/ template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args...) const volatile&& noexcept, false> : basic_traits<true, false, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args...) const volatile&& noexcept; }; /* __stdcall does not work with varargs */ /*template <typename T, typename R, typename... Args> struct fx_traits<R (__stdcall T::*)(Args..., ...) const volatile&& noexcept, false> : basic_traits<true, true, T, R, Args...> { typedef R (__stdcall T::*function_pointer_type)(Args..., ...) const volatile&& noexcept; };*/ #endif // noexcept is part of a function's type #endif // __stdcall x86 VC++ bug template <typename Signature> struct fx_traits<Signature, true> : fx_traits<typename fx_traits<decltype(&Signature::operator())>::function_type, false> {}; template <typename Signature, bool b = std::is_member_object_pointer<Signature>::value> struct callable_traits : fx_traits<std::decay_t<Signature>> { }; template <typename R, typename T> struct callable_traits<R(T::*), true> { typedef std::conditional_t<std::is_array<R>::value, std::add_lvalue_reference_t<T>, R> return_type; typedef return_type Arg; typedef T object_type; using signature_type = R(T::*); static const bool is_noexcept = false; static const bool is_member_function = false; static const std::size_t arity = 1; static const std::size_t free_arity = 2; typedef std::tuple<Arg> args_tuple; typedef types<Arg> args_list; typedef types<T, Arg> free_args_list; typedef meta::tuple_types<return_type> returns_list; typedef return_type(function_type)(T&, return_type); typedef return_type(*function_pointer_type)(T&, Arg); typedef return_type(*free_function_pointer_type)(T&, Arg); template <std::size_t i> using arg_at = void_tuple_element_t<i, args_tuple>; }; } // namespace meta_detail template <typename Signature> struct bind_traits : meta_detail::callable_traits<Signature> {}; template <typename Signature> using function_args_t = typename bind_traits<Signature>::args_list; template <typename Signature> using function_signature_t = typename bind_traits<Signature>::signature_type; template <typename Signature> using function_return_t = typename bind_traits<Signature>::return_type; } } // namespace sol::meta #endif // SOL_BIND_TRAITS_HPP