为超过 9 个参数的构造函数调用 Microsoft::WRL::Make

Question

Microsoft::WRL::Make seems to be defined with a maximum of 9 arguments that will get forwarded to the object's constructor。 std::tuple 是一个显而易见的解决方案，但远非理想。有没有更优雅的方法解决这个问题？

如果有任何 WRL 维护者潜伏，请在 Make（以及 RuntimeClass 等）中添加可变模板支持

Answer 1

FWIW，这是我目前的工作解决方案：

template <typename... Types>
MyClass(std::tuple<Types...> args) :
    MyClass(args, std::make_integer_sequence<size_t, sizeof...(Types)>())
{
}

template <typename... Types, size_t... Indices>
MyClass(std::tuple<Types...>& args, std::integer_sequence<size_t, Indices...>) :
    MyClass(std::get<Indices>(std::move(args))...)
{
}

构建于

auto ptr = Make<MyClass>(std::forward_as_tuple(...));

远非理想，但最坏的情况下它会...

为超过 9 个参数的构造函数调用 Microsoft::WRL::Make

Calling Microsoft::WRL::Make for a constructor with more than 9 arguments

c++

windows-runtime

wrl