Checking runtime object type
Johannes Pfau
nospam at example.com
Wed Feb 8 11:21:45 PST 2012
Am Wed, 8 Feb 2012 11:20:39 -0800
schrieb "H. S. Teoh" <hsteoh at quickfur.ath.cx>:
> What's the correct syntax for checking the runtime type of a derived
> object given its base class pointer? I tried:
>
> Base f() { return new Derived(); }
> Base b = f();
> assert(is(typeof(b)==Derived));
>
> but it throws an error. Apparently typeof(b)==Base; so typeof returns
> only compile-time information? How do I get at the runtime type?
>
>
> T
>
I think using casts is the only way:
Base f() { return new Derived(); }
Base b = f();
auto c = cast(Derived)b;
assert(c !is null);
More information about the Digitalmars-d-learn
mailing list