• Timothee Cour (19/19) Mar 29 2013 version(good) works.
• Maxim Fomin (3/3) Mar 30 2013 This was discussed many times, even recently enhancement request

Timothee Cour <thelastmammoth gmail.com> writes:

version(good) works.
version(bad) does not.
Can we make std.conv.to work for out-of-class opCast?
Use case: same reason as UFCS, where we don't wanna define all methods
inside class def, leading to possible extensions later.
Currently this IS a problem when class A is in a library over which we
have no control and a user defined class B wants to cast from A.

----
import std.conv;
struct B{ int x;}
struct A{
    int x;
    version(good)
    auto opCast(T)() {return B(x);}
}
version(bad)
auto opCast(T)(A a) {return B(a.x);}
void main(){    auto b=to!B(A.init); }
----

"Maxim Fomin" <maxim maxim-fomin.ru> writes:

This was discussed many times, even recently enhancement request
was created in bugzilla. Try to search in archives (in briefly -
no, it is a bad idea, which has opposition, me included).