The Clojure lint tool Eastwood (https://github.com/jonase/eastwood) uses
this {:declared true} metadata to distinguish between a declare followed
later by a def on the same var (no warning) from a def followed later by
another def on the same var (when it issues a warning).
declare is also an explicit signal to the human reader that you do not
intend to give this var a value now, but you plan to later, either because
of mutual recursion in definitions, or for a preferred order of definitions
in the file that you believe is clearer.
Andy
On Thu, Mar 13, 2014 at 7:14 AM, Gal Dolber <g...@dolber.com> wrote:
> #'declare adds extra meta to the var {:declared true}
>
> I don't think it's being used right now, but it can be specially handled
> by the compiler, for example, to ignore the #'declare stataments from the
> emitted bytecode, I'm experimenting with this here:
>
>
> https://github.com/galdolber/clojurefast/commit/649672baede3e0f1cc8b3e9e42b6e899927a9c09
>
>
> On Thu, Mar 13, 2014 at 10:57 AM, Ambrose Bonnaire-Sergeant <
> abonnaireserge...@gmail.com> wrote:
>
>> No difference, but declare can take multiple vars as arguments.
>>
>> Thanks,
>> Ambrose
>>
>>
>> On Thu, Mar 13, 2014 at 9:51 PM, Plínio Balduino <pbaldu...@gmail.com>wrote:
>>
>>> Hi there
>>>
>>> Is there any difference between declare and def when I'm making a
>>> forward declaration?
>>>
>>> Thanks
>>>
>>> Plínio
>>>
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