Re: defining macros within eval

[Maxime Devos]

On 16-10-2022 11:39, Paul Jarc wrote:
> Hi.  I'm updating some old code to work with newer versions of Guile.
> This example used to work with 1.8, but gives an error with 2.2 and
> later:
>
> (begin
>    (eval '(define-syntax-rule (rule x) x) (current-module))
>    (display (rule "ok\n")))
>
> ERROR: Wrong type to apply: #<syntax-transformer rule> [...]

See my previous reply, and also are you sure that 'eval' is appropriate 
here?  Would datum->syntax + read tricks work instead?

For an example in the wild, see e.g. 
<https://git.gnunet.org/gnunet-scheme.git/tree/gnu/gnunet/message/protocols.scm>.

(the (include-from-path "gnu/.../protocols.scmgen" is not relevant here, 
you could inline protocols.scmgen in that example -- I just found 
separating it in a separate file a nicer structure).

Greetings,
Maxime.

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