174 lines
6.5 KiB
C++
174 lines
6.5 KiB
C++
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// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_RESOLVE_HPP
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#define SOL_RESOLVE_HPP
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#include <sol/traits.hpp>
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#include <sol/tuple.hpp>
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namespace sol {
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#ifndef __clang__
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// constexpr is fine for not-clang
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namespace detail {
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template <typename R, typename... Args, typename F, typename = std::invoke_result_t<meta::unqualified_t<F>, Args...>>
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inline constexpr auto resolve_i(types<R(Args...)>, F&&) -> R (meta::unqualified_t<F>::*)(Args...) {
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using Sig = R(Args...);
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typedef meta::unqualified_t<F> Fu;
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return static_cast<Sig Fu::*>(&Fu::operator());
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}
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template <typename F, typename U = meta::unqualified_t<F>>
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inline constexpr auto resolve_f(std::true_type, F&& f)
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-> decltype(resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f))) {
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return resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f));
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}
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template <typename F>
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inline constexpr void resolve_f(std::false_type, F&&) {
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static_assert(meta::call_operator_deducible_v<F>, "Cannot use no-template-parameter call with an overloaded functor: specify the signature");
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}
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template <typename F, typename U = meta::unqualified_t<F>>
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inline constexpr auto resolve_i(types<>, F&& f) -> decltype(resolve_f(meta::call_operator_deducible<U>(), std::forward<F>(f))) {
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return resolve_f(meta::call_operator_deducible<U> {}, std::forward<F>(f));
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}
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template <typename... Args, typename F, typename R = std::invoke_result_t<F&, Args...>>
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inline constexpr auto resolve_i(types<Args...>, F&& f) -> decltype(resolve_i(types<R(Args...)>(), std::forward<F>(f))) {
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return resolve_i(types<R(Args...)>(), std::forward<F>(f));
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}
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template <typename Sig, typename C>
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inline constexpr Sig C::*resolve_v(std::false_type, Sig C::*mem_func_ptr) {
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return mem_func_ptr;
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}
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template <typename Sig, typename C>
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inline constexpr Sig C::*resolve_v(std::true_type, Sig C::*mem_variable_ptr) {
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return mem_variable_ptr;
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}
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} // namespace detail
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template <typename... Args, typename R>
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inline constexpr auto resolve(R fun_ptr(Args...)) -> R (*)(Args...) {
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return fun_ptr;
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}
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template <typename Sig>
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inline constexpr Sig* resolve(Sig* fun_ptr) {
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return fun_ptr;
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}
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template <typename... Args, typename R, typename C>
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inline constexpr auto resolve(R (C::*mem_ptr)(Args...)) -> R (C::*)(Args...) {
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return mem_ptr;
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}
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template <typename Sig, typename C>
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inline constexpr Sig C::*resolve(Sig C::*mem_ptr) {
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return detail::resolve_v(std::is_member_object_pointer<Sig C::*>(), mem_ptr);
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}
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template <typename... Sig, typename F, meta::disable<std::is_function<meta::unqualified_t<F>>> = meta::enabler>
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inline constexpr auto resolve(F&& f) -> decltype(detail::resolve_i(types<Sig...>(), std::forward<F>(f))) {
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return detail::resolve_i(types<Sig...>(), std::forward<F>(f));
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}
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#else
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// Clang has distinct problems with constexpr arguments,
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// so don't use the constexpr versions inside of clang.
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namespace detail {
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template <typename R, typename... Args, typename F, typename = std::invoke_result_t<meta::unqualified_t<F>, Args...>>
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inline auto resolve_i(types<R(Args...)>, F&&) -> R (meta::unqualified_t<F>::*)(Args...) {
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using Sig = R(Args...);
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typedef meta::unqualified_t<F> Fu;
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return static_cast<Sig Fu::*>(&Fu::operator());
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}
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template <typename F, typename U = meta::unqualified_t<F>>
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inline auto resolve_f(std::true_type, F&& f)
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-> decltype(resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f))) {
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return resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f));
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}
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template <typename F>
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inline void resolve_f(std::false_type, F&&) {
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static_assert(meta::call_operator_deducible_v<F>, "Cannot use no-template-parameter call with an overloaded functor: specify the signature");
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}
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template <typename F, typename U = meta::unqualified_t<F>>
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inline auto resolve_i(types<>, F&& f) -> decltype(resolve_f(meta::call_operator_deducible<U>(), std::forward<F>(f))) {
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return resolve_f(meta::call_operator_deducible<U> {}, std::forward<F>(f));
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}
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template <typename... Args, typename F, typename R = std::invoke_result_t<F&, Args...>>
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inline auto resolve_i(types<Args...>, F&& f) -> decltype(resolve_i(types<R(Args...)>(), std::forward<F>(f))) {
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return resolve_i(types<R(Args...)>(), std::forward<F>(f));
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}
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template <typename Sig, typename C>
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inline Sig C::*resolve_v(std::false_type, Sig C::*mem_func_ptr) {
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return mem_func_ptr;
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}
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template <typename Sig, typename C>
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inline Sig C::*resolve_v(std::true_type, Sig C::*mem_variable_ptr) {
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return mem_variable_ptr;
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}
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} // namespace detail
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template <typename... Args, typename R>
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inline auto resolve(R fun_ptr(Args...)) -> R (*)(Args...) {
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return fun_ptr;
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}
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template <typename Sig>
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inline Sig* resolve(Sig* fun_ptr) {
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return fun_ptr;
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}
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template <typename... Args, typename R, typename C>
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inline auto resolve(R (C::*mem_ptr)(Args...)) -> R (C::*)(Args...) {
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return mem_ptr;
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}
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template <typename Sig, typename C>
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inline Sig C::*resolve(Sig C::*mem_ptr) {
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return detail::resolve_v(std::is_member_object_pointer<Sig C::*>(), mem_ptr);
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}
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template <typename... Sig, typename F>
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inline auto resolve(F&& f) -> decltype(detail::resolve_i(types<Sig...>(), std::forward<F>(f))) {
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return detail::resolve_i(types<Sig...>(), std::forward<F>(f));
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}
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#endif
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} // namespace sol
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#endif // SOL_RESOLVE_HPP
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