sol2/sol/function.hpp

#ifndef SOL_FUNCTION_HPP
#define SOL_FUNCTION_HPP

#include <sol.hpp>
#include <sol/tuple.hpp>
#include <sol/reference.hpp>

namespace sol {
class function : virtual public reference {
private:
	template<typename... Args>
	void push_args( Args&&... args ) {
		auto L = state( );
		using swallow = char [];
		void( swallow{ ( stack::push( L, std::forward<Args>( args ) ), '\0' )... } );
	}
public:
	function( ) : reference( ) {}
	function( lua_State* L, int index = -1 ) : reference( L, index ) {
		type_assert( L, index, type::function );
	}

	template<typename T, typename... Args>
	T invoke( Args&&... args ) {
		push( );
		push_args( std::forward<Args>( args )... );
		lua_pcall( state( ), sizeof...( Args ), 1, 0 );
		return stack::pop<T>( state( ) );
	}

	template<typename... Args>
	void invoke( Args&&... args ) {
		push( );
		push_args( std::forward<Args>( args )... );
		lua_pcall( state( ), sizeof...( Args ), 0, 0 );
	}
};
} // sol


#endif // SOL_FUNCTION_HPP