Proposal: Replace __traits and is(typeof(XXX)) with a 'magic namespace'.
Steven Schveighoffer
schveiguy at yahoo.com
Mon Nov 2 10:17:36 PST 2009
On Mon, 02 Nov 2009 13:17:18 -0500, Andrei Alexandrescu
<SeeWebsiteForEmail at erdani.org> wrote:
> Don wrote:
>> [I'm moving this from deep inside a TDPL thread, since I think it's
>> important]
>> is(typeof(XXX)) is infamously ugly and unintuitive
>> __traits(compiles, XXX) is more comprehensible, but just as ugly.
>> They are giving metaprogramming in D a bad name. I think we need to
>> get rid of both of them.
>> A very easy way of doing this is to replace them with a 'magic
>> namespace' -- so that they _look_ as though they're functions in a
>> normal module.
>> Names which have been suggested include 'meta', 'traits', 'scope',
>> 'compiler'. Personally I think 'meta' is the nicest (and I suggested
>> two of the others <g>).
>
> Another keyword, sigh...
Wouldn't meta *replace* a keyword? i.e. no more __traits.
Maybe I misunderstand the proposal, but that's what I thought.
-Steve
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