Class UnpackCaller

lib/base/functionwrapper.hpp:62–77

using BuildIndices = typename build_indices<N>::type;

struct UnpackCaller
{
private:
	template <typename FuncType, size_t... I>
	auto Invoke(FuncType f, const std::vector<Value>& args, indices<I...>) -> decltype(f(args[I]...))
	{
		return f(args[I]...);
	}

public:
	template <typename FuncType, int Arity>
	auto operator() (FuncType f, const std::vector<Value>& args) -> decltype(Invoke(f, args, BuildIndices<Arity>{}))
	{
		return Invoke(f, args, BuildIndices<Arity>{});
	}
};

template<typename FuncType, int Arity, typename ReturnType>
struct FunctionWrapper