Re: cond clause does not allow definitions

[lloda <lloda@sarc.name>]

Fwiw Guile isn't 100% consistent about this, for example match forms don't allow definitions and maybe some other form that I don't recall atm.

> On 22 May 2024, at 22:37, lloda <lloda@sarc.name> wrote:
> 
> 
> This is probably http://git.savannah.gnu.org/gitweb/?p=guile.git;a=commitdiff;h=764e3614b8c13de604399572a67d071621e9ca21 <http://git.savannah.gnu.org/gitweb/?p=guile.git;a=commitdiff;h=764e3614b8c13de604399572a67d071621e9ca21> and the next commit that documents the change. It was after 3.0.9.
> 
>> On 22 May 2024, at 22:33, Damien Mattei <damien.mattei@gmail.com <mailto:damien.mattei@gmail.com>> wrote:
>> 
>> Bonjour,
>> 
>> so it is with the version i currently use which is older than you:
>> (base) mattei@mbp-touch-bar library-FunctProg % guile
>> GNU Guile 3.0.8.99-f3ea8
>> Copyright (C) 1995-2022 Free Software Foundation, Inc.
>> 
>> Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
>> This program is free software, and you are welcome to redistribute it
>> under certain conditions; type `,show c' for details.
>> 
>> Enter `,help' for help.
>> scheme@(guile-user)> (cond (#t (define x 7) x))
>> While compiling expression:
>> Syntax error:
>> unknown file:1:10: definition in expression context, where definitions are
>> not allowed, in form (define x 7)
>> 
>> thanks
>> 
>> On Wed, May 22, 2024 at 10:07 PM Jeronimo Pellegrini <j_p@aleph0.info <mailto:j_p@aleph0.info>>
>> wrote:
>> 
>>> Hello!
>>> 
>>> On 2024-05-22 16:26, Damien Mattei wrote:
>>>> scheme@(guile-user)> (cond (#t (define x 7) x))
>>>> While compiling expression:
>>>> Syntax error:
>>>> unknown file:7:10: definition in expression context, where definitions
>>>> are
>>>> not allowed, in form (define x 7)
>>> 
>>> I get no error here (Guile 3.0.9.164-e1690, compiled locally):
>>> 
>>> scheme@(guile-user)> (cond (else (define x 7) x))
>>> $1 = 7
>>> scheme@(guile-user)> (cond (#t (define x 7) x))
>>> $2 = 7
>>> 
>>> A: (cond (#t (define x 7) x))
>>> B: (cond (else (define x 7) x))
>>> 
>>> | system      | A     | B     |
>>> |-------------|-------|-------|
>>> | Bigloo      | 7     | 7     |
>>> | Biwa        | 7     | 7     |
>>> | Chez        | error | 7     |
>>> | Chibi       | error | 7     |
>>> | Chicken     | 7     | 7     |
>>> | Cyclone     | 7     | 7     |
>>> | Gambit      | error | error |
>>> | Gauche      | 7     | 7     |
>>> | Guile       | 7     | 7     |
>>> | Kawa        | 7     | 7     |
>>> | LIPS        | 7     | error |
>>> | Loko        | error | error |
>>> | MIT         | error | 7     |
>>> | Racket      | 7     | 7     |
>>> | Sagittarius | 7     | 7     |
>>> | Scheme48    | error | 7     |
>>> | Scheme 9    | error | 7     |
>>> | SCM         | 7     | 7     |
>>> | STklos      | 7     | 7     |
>>> | Tinyscheme  | 7     | 7     |
>>> 
>>> * LIPS does not recognise the 'else' clause.
>>> 
>>> J.
>>> 
>