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srfi-1: Rewrite 'find-tail' in Scheme.

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* libguile/srfi-1.c (scm_srfi1_find_tail): Remove.
* libguile/srfi-1.h (scm_srfi1_find_tail): Likewise.
* module/srfi/srfi-1.scm (find-tail): New procedure.
This commit is contained in:
Ludovic Courtès 2020-06-17 17:33:28 +02:00
parent 0360843ace
commit cd4c747fb8
3 changed files with 11 additions and 19 deletions
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18
libguile/srfi-1.c
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@ -575,24 +575,6 @@ SCM_DEFINE (scm_srfi1_delete_duplicates_x, "delete-duplicates!", 1, 1, 0,
}
#undef FUNC_NAME
SCM_DEFINE (scm_srfi1_find_tail, "find-tail", 2, 0, 0,
(SCM pred, SCM lst),
"Return the first pair of @var{lst} whose @sc{car} satisfies the\n"
"predicate @var{pred}, or return @code{#f} if no such element is\n"
"found.")
#define FUNC_NAME s_scm_srfi1_find_tail
{
SCM_VALIDATE_PROC (SCM_ARG1, pred);
for ( ; scm_is_pair (lst); lst = SCM_CDR (lst))
if (scm_is_true (scm_call_1 (pred, SCM_CAR (lst))))
return lst;
SCM_ASSERT_TYPE (SCM_NULL_OR_NIL_P (lst), lst, SCM_ARG2, FUNC_NAME, "list");
return SCM_BOOL_F;
}
#undef FUNC_NAME
SCM_DEFINE (scm_srfi1_length_plus, "length+", 1, 0, 0,
(SCM lst),
"Return the length of @var{lst}, or @code{#f} if @var{lst} is\n"