mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
e69e7c79fa
added variadic_results, to return a variable number of arguments to Lua added variadic_results and as_results added improved function examples (for multiple results and split overloading out) added tests for variadics added tests for C++17 utilities added a forwarding header added a specific `unsafe_function` header added and improved documetation pages
133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2017 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_STACK_PROXY_HPP
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#define SOL_STACK_PROXY_HPP
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#include "stack.hpp"
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#include "function.hpp"
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#include "protected_function.hpp"
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#include "proxy_base.hpp"
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namespace sol {
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struct stack_proxy : public proxy_base<stack_proxy> {
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private:
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lua_State* L;
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int index;
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public:
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stack_proxy() : L(nullptr), index(0) {}
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stack_proxy(lua_State* L, int index) : L(L), index(index) {}
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template<typename T>
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decltype(auto) get() const {
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return stack::get<T>(L, stack_index());
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}
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type get_type() const noexcept {
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return type_of(lua_state(), stack_index());
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}
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int push() const {
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return push(L);
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}
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int push(lua_State* Ls) const {
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lua_pushvalue(Ls, index);
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return 1;
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}
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lua_State* lua_state() const { return L; }
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int stack_index() const { return index; }
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template<typename... Ret, typename... Args>
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decltype(auto) call(Args&&... args) {
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return get<function>().template call<Ret...>(std::forward<Args>(args)...);
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}
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template<typename... Args>
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decltype(auto) operator()(Args&&... args) {
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return call<>(std::forward<Args>(args)...);
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}
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};
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namespace stack {
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template <>
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struct getter<stack_proxy> {
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static stack_proxy get(lua_State* L, int index = -1) {
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return stack_proxy(L, index);
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}
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};
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template <>
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struct pusher<stack_proxy> {
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static int push(lua_State*, const stack_proxy& ref) {
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return ref.push();
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}
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};
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} // stack
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namespace detail {
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template <>
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struct is_speshul<function_result> : std::true_type {};
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template <>
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struct is_speshul<protected_function_result> : std::true_type {};
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template <std::size_t I, typename... Args, typename T>
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stack_proxy get(types<Args...>, index_value<0>, index_value<I>, const T& fr) {
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return stack_proxy(fr.lua_state(), static_cast<int>(fr.stack_index() + I));
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}
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template <std::size_t I, std::size_t N, typename Arg, typename... Args, typename T, meta::enable<meta::boolean<(N > 0)>> = meta::enabler>
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stack_proxy get(types<Arg, Args...>, index_value<N>, index_value<I>, const T& fr) {
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return get(types<Args...>(), index_value<N - 1>(), index_value<I + lua_size<Arg>::value>(), fr);
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}
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}
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template <>
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struct tie_size<function_result> : std::integral_constant<std::size_t, SIZE_MAX> {};
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template <std::size_t I>
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stack_proxy get(const function_result& fr) {
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return stack_proxy(fr.lua_state(), static_cast<int>(fr.stack_index() + I));
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}
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template <std::size_t I, typename... Args>
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stack_proxy get(types<Args...> t, const function_result& fr) {
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return detail::get(t, index_value<I>(), index_value<0>(), fr);
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}
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template <>
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struct tie_size<protected_function_result> : std::integral_constant<std::size_t, SIZE_MAX> {};
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template <std::size_t I>
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stack_proxy get(const protected_function_result& fr) {
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return stack_proxy(fr.lua_state(), static_cast<int>(fr.stack_index() + I));
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}
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template <std::size_t I, typename... Args>
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stack_proxy get(types<Args...> t, const protected_function_result& fr) {
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return detail::get(t, index_value<I>(), index_value<0>(), fr);
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}
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} // sol
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#endif // SOL_STACK_PROXY_HPP
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