Re: [PATCH] add language/wisp to Guile?

[Maxime Devos]

On 24-02-2023 16:45, Ludovic Courtès wrote:
> > > Adding #lang support in Guile would be nice.  As discussed on IRC, it
> > > can be experimented with in a WIP branch.
> > Have you seen my messages on how the "#lang" construct is problematic
> > for some languages, and how alternatives like "[comment delimiter] -*-
> > stuff: scheme/ecmascript/... -*- [comment delimiter]" appear to be
> > equally simple (*) and not have any downsides (**).
> >
> > (*) The port encoding detection supports "-*- coding: whatever -*-",
> > presumably that functionality could be reused.
> >
> > (**) For compatibility with Racket, it's not like we couldn't
> > implement both "#lang" and "-*- stuff: language -*-".
> I haven’t seen your messages yet, I just wanted to express support of
> the general idea.  For years, we have discussed #lang support; I know
> Andy is enthusiastic about it, and while I was initially reluctant, I’ve
> come to appreciate the idea.
>
> What you point out is worth considering, but note that Guile already
> supports #!r6rs for instance.

While I initially thought that #!r6rs was problematic, it was pointed 
out to me that #!r6rs is actually in the R6RS (unlike #lang, and even if 
#lang was in the R6RS, it isn't in the de-jure or de-factor standards of 
many other languages).

As such, #!r6rs is a different (unproblematic) situation compared to 
#lang -- #lang is not the same as #!r6rs from a compatibility perspective.

Greetings,
Maxime.

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