Iterating over an enum associative array

[zirneklis]

On 14/03/2011 14:38, Peter Lundgren wrote:
> == Quote from Nebster (Evil.Nebster at gmail.com)'s article
>> Hey,
>> I'm having some problems iterating over an enumerated associative array.
>> It comes up with this error at compile time:
>>   >  Internal error: e2ir.c 4835
>> I cut the code down to this:
>>   >  import std.stdio;
>>   >
>>   >  enum int[string] assoc = [";": 0, "=": 1, "+": 2, "-": 2, "*": 3,
>> "/": 3];
>>   >
>>   >  void main()
>>   >  {
>>   >  	foreach(op; assoc.byKey())
>>   >  		writefln("op: %s", op);
>>   >  }
>> What does this mean/how can I get this to work?
>> Thanks,
>> Nebster
>
>
> That's a rather cryptic error message. Hopefully someone smarter than I can trace
> down why this doesn't have better error reporting. I suspect the problem has
> something to do with CTFE. Because you're using an enum, D assumes you want its
> value to be computed at compile time. However, currently, associative arrays can
> not be evaluated at compile time. Using a static this to initialize the value at
> runtime, as already suggested, should solve your issue.

That's not the cryptic part, its the name of the source file and line 
number, its tripping up here:

AssocArrayLiteralExp::toElem
//...
Type *t = type->toBasetype()->mutableOf();
assert(t->ty == Taarray);			//line 4835

Though to me that whole function looks like a pile of random abbreviations.