Have switch()es for types match subtypes

ID:2026629
 
Jan 29 2016, 10:50 am
Not Feasible
Applies to:DM Language
Status: Not Feasible
Implementing this feature is not possible now or in the foreseeable future
See: Title.

It would make some of our if -> else if -> blah trees a bit nicer.
Jan 29 2016, 11:30 am
Lummox JR resolved issue (Not Feasible)
Jan 29 2016, 11:32 am
The switch() statement isn't meant to be used for types; at least not for general istype() checks where it could match every subtype too. switch() only works with specific values, or for numbers it allows ranges, but that's it.

But if you're doing something where you're just trying to collapse a bunch of if/else trees with istype() checks, then it seems like what you really want is polymorphism anyway.
Jan 29 2016, 12:18 pm
in our case, we use if/else if trees of istype() checks, where speed matters (proc call overhead), or because src type matters too, (like item interaction)
Jan 29 2016, 12:20 pm
That may be all you can do, then. This definitely isn't something switch() could take on, becuase it does specific-value comparisons.

Internally our switch() is actually just an if/else anyway.