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Fix Range#include? for beginless exclusive string ranges

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Previously, include? would return true for the end of the range,
when it should return false because the range is exclusive.

Research and Analysis by Victor Shepelev.

Fixes [Bug #18577]
This commit is contained in:
Jeremy Evans 2022-02-09 09:58:05 -08:00
parent 05b1944c53
commit fd710d7e99
Notes: git 2022-02-10 12:48:02 +09:00 
Merged: https://github.com/ruby/ruby/pull/5541
2 changed files with 7 additions and 0 deletions
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3
range.c
View file

@ -1792,6 +1792,9 @@ range_include_internal(VALUE range, VALUE val, int string_use_cover)
else if (NIL_P(beg)) {
VALUE r = rb_funcall(val, id_cmp, 1, end);
if (NIL_P(r)) return Qfalse;
if (RANGE_EXCL(range)) {
return RBOOL(rb_cmpint(r, val, end) < 0);
}
return RBOOL(rb_cmpint(r, val, end) <= 0);
}
else if (NIL_P(end)) {

4
test/ruby/test_range.rb
View file

@ -604,6 +604,10 @@ class TestRange < Test::Unit::TestCase
assert_include(0...10, 5)
assert_include(5..., 10)
assert_not_include(5..., 0)
assert_include(.."z", "z")
assert_not_include(..."z", "z")
assert_include(..10, 10)
assert_not_include(...10, 10)
end
def test_cover