Mailing List Archive: Re: How can one use named constants in switch?

[REBOL] Re: How can one use named constants in switch?

From: lmecir:mbox:vol:cz at: 25-Oct-2001 13:04


Hi Dave,

> I just spent a while trying to figure out why the following fails:
>
> case_a: 1
> case_b: 2
>
> msgType: getMsg ...  ; integer!
>
> switch msgType [
> case_a [ msgA ]
>    ...
> ]
>
> this fails since the cases are variables not constants (from a C
perspective
> where case_X would be an enum or #define). Is there any way to write this
except
> switch msgType [
> 1 [ msgA ]
>    ...
> ]
>
> ? Thanks,
> Dave

There is, of course:

switch msgType reduce [
    case_a []
    ...
]