https://issues.dlang.org/show_bug.cgi?id=23377
RazvanN <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] Severity|normal |enhancement --- Comment #2 from RazvanN <[email protected]> --- This is intended behavior. For more information check [1]. Long story short, the current mechanism is in place to prevent hijacking. I guess an argument can be made that in this case neither A nor C are implicitly convertible to B, but to me this just seems like adding special cases when the alternative would be to simply use an alias to introduce fun(B) in the same overload set as the other fun methods. I am inclined to close this as a WONTFIX. Either way, this is not a bug, but an enhancement request by the current language rules. [1] https://dlang.org/articles/hijack.html#derived-class-members --
