Standalone AA implementation ready for review (Was: Re: Replacing AA's in druntime)

[H. S. Teoh]

On Thu, Mar 15, 2012 at 10:22:06AM -0700, H. S. Teoh wrote:
[...]
> This is one major area that I forgot to mention, and that is, making AA
> literals work at compile-time. Currently things like this don't work:
> 
> 	enum myAA = ["abc":123, "def":456];
> 
> I'd like to make that work. That would require compile-time construction
> of the AA and storing it in some form that the compiler can put into the
> object file. I'm thinking of something along the lines of using mixins
> to generate explicit instances of Slot structs, so the above would
> translate to something like:
[...]

Hmm. I just did a little test to see how feasible this is, and I create
the AA Slots and array of pointers to slots fine, but hashOf() doesn't
work in CTFE:

/usr/src/d/druntime/src/rt/util/hash.d(38): Error: reinterpreting cast from const(ubyte)* to ushort* is not supported in CTFE
/usr/src/d/druntime/src/rt/util/hash.d(72):        called from here: get16bits(data)

Should I submit a pull request for a __ctfe variant of hashOf so that it
can be used for this purpose? Any gotchas I should be aware of?


T

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