This sort of pattern is used quite a lot in clojure (even in core):
(let [data (if (string? data) (read-string data) data)
data (if (string? (first data)) (first data) (next data))
data (if (string? (first data)) (first data) (next data))]
data)
Throwing exceptions on overridden variable names would not only break
Clojure code, but also is very "non-lispy".
Timothy
On Tue, Feb 12, 2013 at 6:31 AM, AtKaaZ <atk...@gmail.com> wrote:
> it makes sense to not throw now that I think about it, when using "_"
> instead of "a"
> I'm also thinking of cases like:
> => (let [a 1]
> (let [b 2 a 3]
> (println a b)))
> 3 2
> nil
>
> is there something that would let me know I'm overwriting "a" ? I figure
> if something like this would slip by would be tough to track down
>
>
> On Tue, Feb 12, 2013 at 1:46 PM, Michael Wood <esiot...@gmail.com> wrote:
>
>> On 12 February 2013 12:28, AtKaaZ <atk...@gmail.com> wrote:
>> > what would this do:
>> >
>> > (let [a 1, a 2] a)
>> > becomes:
>> > (let [a 1, a123 2] a)
>> > or
>> > (let [a 1, a123 2] a123)
>> > or
>> > exception[I prefer]
>>
>> It would be the second option, i.e.:
>>
>> (let [a 1, a123 2] a123)
>>
>> The original code is valid, so it would not throw an exception.
>>
>> > On Tue, Feb 12, 2013 at 7:10 AM, Ambrose Bonnaire-Sergeant
>> > <abonnaireserge...@gmail.com> wrote:
>> >>
>> >> Processing a hygienic AST relieves the burden of worrying about
>> shadowing
>> >> of locals.
>> >>
>> >> Wherever a binding would normally be shadowed, it is instead renamed
>> to a
>> >> local binding currently not in scope.
>> >>
>> >> eg. (let [a 1, a a] a)
>> >>
>> >> becomes
>> >>
>> >> (let [a 1, a123 a] a123)
>> >>
>> >> It can be useful for those processing Clojure's analysis results.
>> >>
>> >> Thanks,
>> >> Ambrose
>> >>
>> >>
>> >> On Tue, Feb 12, 2013 at 1:54 AM, kovas boguta <kovas.bog...@gmail.com>
>> >> wrote:
>> >>>
>> >>> What is a hygienic AST?
>> >>>
>> >>> Thanks
>> >>> k
>> >>>
>> >>>
>> >>> On Sun, Feb 10, 2013 at 10:45 PM, Ambrose Bonnaire-Sergeant
>> >>> <abonnaireserge...@gmail.com> wrote:
>> >>> > Hi everyone,
>> >>> >
>> >>> > Happy to release analyze 0.3.0 with new hygienic code transformation
>> >>> > capabilities.
>> >>> >
>> >>> > [analyze "0.3.0"]
>> >>> >
>> >>> > In a line:
>> >>> >
>> >>> > analyze.hygienic=> (-> (ast (let [a 1 a a b a a a] a)) ast-hy
>> emit-hy)
>> >>> > ((fn* ([] (let* [a 1 a2921 a b a2921 a2922 a2921] a2922))))
>> >>> >
>> >>> > Hygienic AST's have enabled large performance boosts in core.typed.
>> I'm
>> >>> > excited to see how it could
>> >>> > be as useful to others.
>> >>> >
>> >>> > Note: "hygienic" AST's (those transformed with
>> >>> > `analyze.hygienic/ast-hy` can
>> >>> > be printed normally with `analyze.emit-form/emit-form`, and
>> >>> > hygienically
>> >>> > with `analyze.hygienic/emit-hy`.
>> >>> >
>> >>> > https://github.com/frenchy64/analyze
>> >>> >
>> >>> > Thanks,
>> >>> > Ambrose
>> >>> >
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>> >
>> >
>> >
>> >
>> > --
>> > Please correct me if I'm wrong or incomplete,
>> > even if you think I'll subconsciously hate it.
>> >
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>>
>>
>> --
>> Michael Wood <esiot...@gmail.com>
>>
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>>
>
>
> --
> Please correct me if I'm wrong or incomplete,
> even if you think I'll subconsciously hate it.
>
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