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d7ea4718c8
Makes more sense, as the return does not always have to be multiple types. (Indeed, it is specialized for 1 and 0 cases).
85 lines
3.3 KiB
C++
85 lines
3.3 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013 Danny Y., Rapptz
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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_FUNCTION_HPP
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#define SOL_FUNCTION_HPP
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#include "reference.hpp"
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#include "tuple.hpp"
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#include "stack.hpp"
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#include <cstdint>
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namespace sol {
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class function : public reference {
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private:
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void luacall (std::size_t argcount, std::size_t resultcount) {
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lua_call(state(), static_cast<uint32_t>(argcount), static_cast<uint32_t>(resultcount));
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}
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template<typename... Ret>
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std::tuple<Ret...> invoke(types<Ret...>, std::size_t n) {
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luacall(n, sizeof...(Ret));
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return stack::pop_reverse_call(state(), std::make_tuple<Ret...>, types<Ret...>());
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}
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template<typename Ret>
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Ret invoke(types<Ret>, std::size_t n) {
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luacall(n, 1);
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return stack::pop<Ret>(state());
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}
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void invoke(types<void>, std::size_t n) {
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luacall(n, 0);
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}
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void invoke(types<>, std::size_t n) {
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luacall(n, 0);
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}
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public:
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function() : reference() {}
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function(lua_State* L, int index = -1): reference(L, index) {
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type_assert(L, index, type::function);
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}
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function(const function&) = default;
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function& operator=(const function&) = default;
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template<typename... Args>
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void operator()(Args&&... args) {
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call<>(std::forward<Args>(args)...);
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}
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template<typename... Ret, typename... Args>
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typename return_type<Ret...>::type operator()(types<Ret...>, Args&&... args) {
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return call<Ret...>(std::forward<Args>(args)...);
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}
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template<typename... Ret, typename... Args>
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typename return_type<Ret...>::type call(Args&&... args) {
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push();
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stack::push_args(state(), std::forward<Args>(args)...);
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return invoke(types<Ret...>(), sizeof...(Args));
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}
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};
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} // sol
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#endif // SOL_FUNCTION_HPP
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