mirror of
https://github.com/ThePhD/sol2.git
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96 lines
3.3 KiB
C++
96 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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namespace sol {
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class function : virtual public reference {
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private:
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template<typename... Ret>
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struct invoker {
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template<typename... Args>
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static std::tuple<Ret...> call(const function& ref, Args&&... args) {
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lua_pcall( ref.state( ), sizeof...( Args ), sizeof...( Ret ), 0 );
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return std::make_tuple(stack::pop<Ret>(ref.state())...);
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}
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};
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template<>
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struct invoker<> {
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template<typename... Args>
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static void call(const function& ref, Args&&... args) {
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lua_pcall( ref.state( ), sizeof...( Args ), 0, 0 );
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}
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};
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template<typename T>
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struct invoker<T> {
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template<typename... Args>
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static T call(const function& ref, Args&&... args) {
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lua_pcall( ref.state( ), sizeof...( Args ), 1, 0 );
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return stack::pop<T>( ref.state( ) );
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}
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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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lua_pcall( state( ), n, sizeof...( Ret ), 0 );
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return stack::pop_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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lua_pcall( state( ), n, 1, 0 );
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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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lua_pcall( state( ), n, 0, 0 );
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}
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void invoke( types<>, std::size_t n ) {
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lua_pcall( state( ), n, 0, 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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template<typename... Ret, typename... Args>
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auto invoke(Args&&... args) -> decltype(invoke( types<Ret...>( ), sizeof...( 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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