How do I find the arity of an Expression? (dmd hacking)

[Ellery Newcomer]

On 11/30/2009 03:53 AM, Ary Borenszweig wrote:
> Chad J wrote:
>> Given an Expression object in dmd, I'd like to know how many
>> subexpressions it contains and, even better, iterate over them. I'd
>> like to do this in a general way, without having to create cases for all
>> of the different kinds of Expressions. Is there some way to do this
>> that I've been missing?
>>
>> Thanks,
>> - Chad
>
> Where's the Expression object defined in D? I don't think there's such a
> thing (I mean, a reflection capability to get an expression out of
> something).

DMD source, eg parse.c, expression.c, etc