Having trouble passing multiple initializer lists to variadic function template

Question

I don\'t understand the error message when trying to pass a variable number of initializer lists:

template
void foo(Values...)
{
}
         


        

Answer 1

The problem is indeed deducibility, as mentioned by other answers. Instead of providing a second function taking an initializer_list, you may specify the type of the argument to foo when calling the function:

#include 

template
void foo(Values...)
{
}

int main()
{
  foo(1, 2, 3, "hello", 'a');
  foo(std::initializer_list{1}, std::initializer_list{2, 3});
}

Deciding how to treat each parameter, is another question, however.

[EDIT]: Idea is taken from std::shared_ptr and initializer lists