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Re: Some reader syntax for data structures

From: Ludovic Courtès
Subject: Re: Some reader syntax for data structures
Date: Wed, 03 Apr 2019 22:39:01 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)


Alex Vong <address@hidden> skribis:

> I enjoy the clojure hash-map syntax and I think guile vhash can sort of
> fit this place with a good reader syntax.

I use something like this:

  (define-syntax vhash
    (syntax-rules (=>)
      "Build a vhash with the given key/value mappings."
      ((_ (key others ... => value) rest ...)
       (vhash-cons key value
                   (vhash (others ... => value) rest ...)))
      ((_ (=> value) rest ...)
       (vhash rest ...))))

Of course that doesn’t fill the exact same role as a reader syntax since
it doesn’t allow you to transfer a vhash over the wire, but for cases
where you only want to define a literal vhash, I find it “good enough.”


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