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authormrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-04-04 03:34:55 +0000
committermrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-04-04 03:34:55 +0000
commitf1fb989f1a17c63af1062ea402ed50f0d6cb4efa (patch)
tree8df231ea81ad5df2a408c9a5a431421f42516ea9 /enumerator.c
parent53d3fe0643c591a9083e22ccea62e49f451fd450 (diff)
enumerator.c: make arith_seq_first support nil begin
* enumerator.c: (arith_seq_first): support nil begin. * test/ruby/test_arithmetic_sequence.rb (test_first): add assertions for beginless and endless arithmetic sequences. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67435 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'enumerator.c')
-rw-r--r--enumerator.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/enumerator.c b/enumerator.c
index 37f8e6b..cfc6a5d 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -3029,6 +3029,9 @@ arith_seq_first(int argc, VALUE *argv, VALUE self)
e = arith_seq_end(self);
s = arith_seq_step(self);
if (argc == 0) {
+ if (NIL_P(b)) {
+ return Qnil;
+ }
if (!NIL_P(e)) {
VALUE zero = INT2FIX(0);
int r = rb_cmpint(rb_num_coerce_cmp(s, zero, idCmp), s, zero);