Multiple Default Constructors

Question

From this stack overflow question the answer contains this quote:

... definition says that all default constructors (in case there are multiple) ...

Answer 1

Here's an example of a class with two default constructors that can be default constructed:

struct Foo
{
    Foo(); // #1

    template 
    Foo(Args...); // #2
};

auto test()
{
    Foo f{}; // ok calls #1
}