opCall override default constructor?

[Jacob Carlborg via Digitalmars-d-learn]

Is it intentional that a non-static opCall overrides the default 
constructor of a struct?

struct Foo
{
     int a;

     void opCall(string b) { }
}

void main()
{
     auto f = Foo(3); // line 14
     f("asd");
}

The above code gives the following error:

main.d(14): Error: function main.Foo.opCall (string b) is not callable 
using argument types (int)

-- 
/Jacob Carlborg