Re: procedure to check equality of list-elements

[Jean Abou Samra]

Le 06/11/2022 à 13:27, Thomas Morley a écrit :
> Call me surprised.
> The guile manual only gives code-examples comparing _two_ values with
> eq? and friends.
> I didn't know and didn't imagine it would work for more arguments as
> you wrote above.


Well, call me surprised too. R5RS section 6.1 defines eqv? on
two arguments only.

https://www.schemers.org/Documents/Standards/R5RS/r5rs.pdf

So does R6RS section 11.5.

http://www.r6rs.org/final/r6rs.pdf

Thus (eqv? a b c d) is a Guile extension.

On the other hand, these standards do define all of
  = < > <= >= max min + * - /
on any number of arguments. No clue why it isn't the
case for eq?, eqv? and equal? then...

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