On Wednesday, 14 June 2017 at 09:34:27 UTC, Balagopal Komarath
wrote:
Why doesn't this work? The Test!Duck type has a void quack()
method but the compiler says it is not implemented.
You question was answered, but you can do this:
------------------
interface IDuck
{
void quack();
}
struct Duck
{
void quack()
{
import std.stdio : writeln;
writeln("Quack");
}
}
void main()
{
Duck d;
import std.experimental.typecons : wrap;
IDuck i = wrap!IDuck(d);
i.quack();
}
-----------------
Please note that you can't wrap to an interface which returns
itself
interface IDuck {
IDuck clone();
}
It fails because the struct would return a Duck and wouldn't wrap
it to an IDuck. This is only a limitation on wrap because I
haven't written the detection and appropriate wrapping function
call.
