Bertrand Bordage <bordage.bertr...@gmail.com> writes:
> This would be great if Han-Wen decides to keep it like that.
> Otherwise there is really a lot of work, with many shortcuts to
> define.
> to_boolean (scm_is_pair (x))
That one would be wrong since scm_is_pair already returns a C boolean.
-- C Function: int scm_is_pair (SCM x)
Return 1 when X is a pair; otherwise return 0.
And if you are worried about speed:
-- Macro: int SCM_CONSP (SCM X)
Return non-zero iff X is a Scheme pair object.
-- Macro: int SCM_NCONSP (SCM X)
The complement of SCM_CONSP.
> to_boolean (scm_list_p (x)) && !to_boolean (scm_null_p (x))
Sounds like SCM_CONSP should usually do fine (though it does not
distinguish proper and improper lists). And I don't see that there is a
"dirty" shortcut for that particularly check either.
--
David Kastrup
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