operator overloading outside the type

[Nick Treleaven]

On Saturday, 29 March 2025 at 16:00:16 UTC, Timon Gehr wrote:
> ```
> import std.stdio;
>
> struct S{
>     void foo(){ writeln("member"); }
> }
>
> struct T{
>     S s;
>     alias this=s;
> }
>
> void foo(S s){ writeln("ufcs"); }

I think `foo` should be `void foo(T t)`, but it still prints 
"member" anyway :-)

> void main(){
>     T t;
>     t.foo();
> }
> ```
>
> Prints "member" (of course).