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

James Baker cycle.code.media at gmail.com
Sun Oct 26 17:58:29 EDT 2014


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??
>
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