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-rw-r--r--libguile/srfi-1.c59
1 files changed, 0 insertions, 59 deletions
diff --git a/libguile/srfi-1.c b/libguile/srfi-1.c
index 64b4f46ee..56e12296b 100644
--- a/libguile/srfi-1.c
+++ b/libguile/srfi-1.c
@@ -272,65 +272,6 @@ SCM_DEFINE (scm_srfi1_delete_duplicates_x, "delete-duplicates!", 1, 1, 0,
}
#undef FUNC_NAME
-SCM_DEFINE (scm_srfi1_lset_difference_x, "lset-difference!", 2, 0, 1,
- (SCM equal, SCM lst, SCM rest),
- "Return @var{lst} with any elements in the lists in @var{rest}\n"
- "removed (ie.@: subtracted). For only one @var{lst} argument,\n"
- "just that list is returned.\n"
- "\n"
- "The given @var{equal} procedure is used for comparing elements,\n"
- "called as @code{(@var{equal} elem1 elemN)}. The first argument\n"
- "is from @var{lst} and the second from one of the subsequent\n"
- "lists. But exactly which calls are made and in what order is\n"
- "unspecified.\n"
- "\n"
- "@example\n"
- "(lset-difference! eqv? (list 'x 'y)) @result{} (x y)\n"
- "(lset-difference! eqv? (list 1 2 3) '(3 1)) @result{} (2)\n"
- "(lset-difference! eqv? (list 1 2 3) '(3) '(2)) @result{} (1)\n"
- "@end example\n"
- "\n"
- "@code{lset-difference!} may modify @var{lst} to form its\n"
- "result.")
-#define FUNC_NAME s_scm_srfi1_lset_difference_x
-{
- SCM ret, *pos, elem, r, b;
- int argnum;
-
- SCM_VALIDATE_PROC (SCM_ARG1, equal);
- SCM_VALIDATE_REST_ARGUMENT (rest);
-
- ret = SCM_EOL;
- pos = &ret;
- for ( ; scm_is_pair (lst); lst = SCM_CDR (lst))
- {
- elem = SCM_CAR (lst);
-
- for (r = rest, argnum = SCM_ARG3;
- scm_is_pair (r);
- r = SCM_CDR (r), argnum++)
- {
- for (b = SCM_CAR (r); scm_is_pair (b); b = SCM_CDR (b))
- if (scm_is_true (scm_call_2 (equal, elem, SCM_CAR (b))))
- goto next_elem; /* equal to elem, so drop that elem */
-
- SCM_ASSERT_TYPE (SCM_NULL_OR_NIL_P (b), b, argnum, FUNC_NAME,"list");
- }
-
- /* elem not equal to anything in later lists, so keep it */
- *pos = lst;
- pos = SCM_CDRLOC (lst);
-
- next_elem:
- ;
- }
- SCM_ASSERT_TYPE (SCM_NULL_OR_NIL_P (lst), lst, SCM_ARG2, FUNC_NAME, "list");
-
- *pos = SCM_EOL;
- return ret;
-}
-#undef FUNC_NAME
-
void
scm_register_srfi_1 (void)