Stefan Israelsson Tampe schreef op vr 04-02-2022 om 21:11 [+0100]: > using an implicit let in conditionals are bad in that you cannot > escape from the let form which means that you loos > conditional defines for example in the toplevel. e.g. [...]
While old versions of Guile (Guile 1.8?) did support conditional
defines on the top-level, new versions of Guile (Guile 2.0 and later)
don't:
(if #true
(define x 'foo)
(define x 'bar))
While compiling expression:
Syntax error:
unknown file:2:4: definition in expression context, where definitions
are not allowed, in form (define x (quote foo))
The following still works though of course:
(define x (if #true 'foo 'bar))
So for the current version of Guile (3.0.X), there don't appear to be
backwards-compatibility problems in this area.
Greetings,
Maxime.
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