On Sep 4, 12:54 am, Meikel Brandmeyer <m...@kotka.de> wrote:
> Hi,
>
> Am 03.09.2011 um 23:12 schrieb Alan Malloy:
>
> > Huh, interesting. I assumed ^:foo meta syntax was new to 1.3, and
> > wouldn't compile at all in 1.2. But now I see that in 1.2 it's
> > equivalent to ^{:tag :foo} - not useful, but not damaging either. I
> > guess I'll start using ^:dynamic myself.
>
> #^something was equivalent to #^{:tag something}. Back when we did types not
> with defrecord but with (with-meta {:foo :bar} {:tag ::my-type}) it actually
> was useful. With the advent of defrecord this need for this diminished. So,
> it at least was useful.
Well, ^something still is equivalent to ^{:tag something}, which as I
understand it is useful for compiler typehinting. I just was unaware
that this worked for keywords as well as symbols, though when you
point out that tags were used for custom types this makes more sense.
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