[gambit-list] Macro to use “λ” character as “lambda” in R5RS Scheme?

James Baker cycle.code.media at gmail.com
Sun Oct 26 22:59:48 EDT 2014


Not really gambit specific but it works like this:

#!/usr/local/Gambit-C/bin/scheme-r5rs -:s

On Mon, Oct 27, 2014 at 1:49 PM, Roy Pfund <roypfund at gmail.com> wrote:

> The shebang "#!/usr/bin/env scheme-r5rs -:s" doesn't even call Gambit, an
> gives the following error:
>
> /usr/bin/env: scheme-r5rs -:s: No such file or directory
>
>
> On Sun, Oct 26, 2014 at 9:31 PM, James Baker <cycle.code.media at gmail.com>
> wrote:
>
>> I dont use them but I think for memory scheme-r5rs and the like only set
>> case sensitivity and keyword preferences, it wont make syntax-rules /
>> syntax-case available to you for that you would still need tell it to load
>> eg.
>>
>> scheme-r5rs -:s
>>
>>
>>
>> On Mon, Oct 27, 2014 at 1:20 PM, Roy Pfund <roypfund at gmail.com> wrote:
>>
>>> I'm using scheme-r5rs not the regular gsi and your solution doesn't
>>> work;
>>>
>>> So does anyone know how I can set "standard Scheme mode" just like the
>>> command line option "-:s" from within a executable scheme file??
>>>
>>> On Sun, Oct 26, 2014 at 4:58 PM, James Baker <cycle.code.media at gmail.com
>>> > wrote:
>>>
>>>> I know its not exactly what you asked for, but I found this gambit
>>>> specific trick recently.
>>>>
>>>> (##include "~~/lib/_gambit#.scm")
>>>> (define-runtime-syntax λ (##make-alias-syntax '##lambda))
>>>>
>>>> Which you can use as normal:
>>>>
>>>> > (define square (λ (x) (* x x)))
>>>> > square
>>>> #<procedure #2 square>
>>>> > (square 42)
>>>> 1764
>>>> >
>>>>
>>>> James
>>>>
>>>> On Mon, Oct 27, 2014 at 5:20 AM, Roy Pfund <roypfund at gmail.com> wrote:
>>>> > From http://stackoverflow.com/a/26570837/144020 I tried the
>>>> following:
>>>> >
>>>> > (define-syntax λ (syntax-rules () ((_ param body ...) (lambda param
>>>> body
>>>> > ...))))
>>>> >
>>>> > It works! but ONLY IF you call the script from the gsi not with
>>>> >
>>>> > #!/usr/bin/env scheme-r5rs
>>>> >
>>>> > Does anyone know I can set the command line OPTION s|S "set standard
>>>> Scheme
>>>> > mode" from within a scheme file??
>>>> >
>>>> > _______________________________________________
>>>> > Gambit-list mailing list
>>>> > Gambit-list at iro.umontreal.ca
>>>> > https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-list
>>>> >
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> ------------------------------
>>>  RoyPfund at gmail.com
>>>  AT1-ROY-BOY1
>>> (281-769-2691)
>>>
>>
>>
>
>
> --
>
> ------------------------------
>  RoyPfund at gmail.com
>  AT1-ROY-BOY1
> (281-769-2691)
>
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