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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_RESOLVE_HPP
+#define SOL_RESOLVE_HPP
+
+#include "traits.hpp"
+#include "tuple.hpp"
+
+namespace sol {
+ namespace detail {
+ template<typename R, typename... Args, typename F, typename = std::result_of_t<meta::unqualified_t<F>(Args...)>>
+ inline auto resolve_i(types<R(Args...)>, F&&)->R(meta::unqualified_t<F>::*)(Args...) {
+ using Sig = R(Args...);
+ typedef meta::unqualified_t<F> Fu;
+ return static_cast<Sig Fu::*>(&Fu::operator());
+ }
+
+ template<typename F, typename U = meta::unqualified_t<F>>
+ inline auto resolve_f(std::true_type, F&& f)
+ -> decltype(resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f))) {
+ return resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f));
+ }
+
+ template<typename F>
+ inline void resolve_f(std::false_type, F&&) {
+ static_assert(meta::has_deducible_signature<F>::value,
+ "Cannot use no-template-parameter call with an overloaded functor: specify the signature");
+ }
+
+ template<typename F, typename U = meta::unqualified_t<F>>
+ inline auto resolve_i(types<>, F&& f) -> decltype(resolve_f(meta::has_deducible_signature<U>(), std::forward<F>(f))) {
+ return resolve_f(meta::has_deducible_signature<U> {}, std::forward<F>(f));
+ }
+
+ template<typename... Args, typename F, typename R = std::result_of_t<F&(Args...)>>
+ inline auto resolve_i(types<Args...>, F&& f) -> decltype(resolve_i(types<R(Args...)>(), std::forward<F>(f))) {
+ return resolve_i(types<R(Args...)>(), std::forward<F>(f));
+ }
+
+ template<typename Sig, typename C>
+ inline Sig C::* resolve_v(std::false_type, Sig C::* mem_func_ptr) {
+ return mem_func_ptr;
+ }
+
+ template<typename Sig, typename C>
+ inline Sig C::* resolve_v(std::true_type, Sig C::* mem_variable_ptr) {
+ return mem_variable_ptr;
+ }
+ } // detail
+
+ template<typename... Args, typename R>
+ inline auto resolve(R fun_ptr(Args...))->R(*)(Args...) {
+ return fun_ptr;
+ }
+
+ template<typename Sig>
+ inline Sig* resolve(Sig* fun_ptr) {
+ return fun_ptr;
+ }
+
+ template<typename... Args, typename R, typename C>
+ inline auto resolve(R(C::*mem_ptr)(Args...))->R(C::*)(Args...) {
+ return mem_ptr;
+ }
+
+ template<typename Sig, typename C>
+ inline Sig C::* resolve(Sig C::* mem_ptr) {
+ return detail::resolve_v(std::is_member_object_pointer<Sig C::*>(), mem_ptr);
+ }
+
+ template<typename... Sig, typename F>
+ inline auto resolve(F&& f) -> decltype(detail::resolve_i(types<Sig...>(), std::forward<F>(f))) {
+ return detail::resolve_i(types<Sig...>(), std::forward<F>(f));
+ }
+} // sol
+
+#endif // SOL_RESOLVE_HPP