dereferencing null

[H. S. Teoh]

On Thu, Mar 08, 2012 at 05:49:20PM +0100, Andrej Mitrovic wrote:
> On 3/8/12, H. S. Teoh <hsteoh at quickfur.ath.cx> wrote:
> > 	foreach (name; __traits(allMembers, typeof(obj))) {
> > 		static if (__traits(compiles, &__traits(getMember, obj,
> > 				name)))
> > 		{
> > 			alias typeof(__traits(getMember, obj, name))
> > 				type;
> > 			static if (is(type==function)) {
> > 				// name refers to a function of type
> > 				// 'type' here
> > 			}
> > 		}
> > 	}
> >
> >> I've never had an easy time interacting with __traits.
> 
> Yesterday I've tried the same thing but it didn't work because I was
> missing the &__traits call. With that in place, here's a very
> hardcoded example of what you can do in D:
> 
> http://paste.pocoo.org/show/562933/
> 
> So now you can catch the exception if the object was uninitialized.
> And you didn't have to modify the target class at all.

Cool! That's a really neat way of doing it. Love the combination of
alias this, compile-time introspection, and the awesomeness of D
templates. D r0x0rs!


T

-- 
Your inconsistency is the only consistent thing about you! -- KD