Problem occurs when using multiple/nested function pointers and arguments

[xziyue]

Because my functions do not conform to the required format, I create a helper function to solve this problem, namely

template<typename Fn, typename... Args>
inline void FuncWrapper(int, Fn &&fn, Args&&... args) {
	fn(forward<Args>(args)...);
}

.

That is, if I have a function, e.g.

void print(int num){cout<<num<<endl;}

, I should be able to push it into the thread pool by calling

using task_type = decltype(&print);
auto ptr = &FuncWrapper<task_type,int>;
pool.push(ptr,&print,num);

.

But this simply does not work, for some parts of the code lack the process of coping these arguments and applying "std::forward" to them.

[alexshen]

push uses std::bind which will pass stored arguments to ptr as lvalues, but the second and third parameters of ptr are rvalue references, so it won't compile. You can change your ptr to

auto ptr = &FuncWrapper<task_type&, int&>