Implicit conversion from null in custom type

[Vladimir Panteleev via Digitalmars-d-learn]

On Thursday, 28 May 2015 at 12:37:52 UTC, Andrea Fontana wrote:
> What's the problem with ctor taking typeof(null)?
> I've just used it, maybe I missed something?

It doesn't work:

////////// test.d /////////
struct S
{
     this(typeof(null) p) {}
}

void fun(S s) {}
void main() { fun(null); }
///////////////////////////

test.d(7): Error: function test.fun (S s) is not callable using 
argument types (typeof(null))