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Range#size returns nil for (.."a") and (nil..)

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Fixes [Bug #18983]
This commit is contained in:
Yusuke Endoh 2022-10-21 13:39:15 +09:00
parent e72c5044ce
commit e026368061
Notes: git 2022-10-21 07:36:07 +00:00 
Merged: https://github.com/ruby/ruby/pull/6604
3 changed files with 28 additions and 6 deletions
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2
range.c
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@ -816,8 +816,10 @@ range_size(VALUE range)
}
}
else if (NIL_P(b)) {
if (rb_obj_is_kind_of(e, rb_cNumeric)) {
return DBL2NUM(HUGE_VAL);
}
}
return Qnil;
}

17
spec/ruby/core/range/size_spec.rb
View file

@ -34,12 +34,29 @@ describe "Range#size" do
eval("([]...)").size.should == nil
end
ruby_version_is ""..."3.2" do
it 'returns Float::INFINITY for all beginless ranges' do
(..1).size.should == Float::INFINITY
(...0.5).size.should == Float::INFINITY
(..nil).size.should == Float::INFINITY
(...'o').size.should == Float::INFINITY
end
end
ruby_version_is "3.2" do
it 'returns Float::INFINITY for all beginless ranges if the start is numeric' do
(..1).size.should == Float::INFINITY
(...0.5).size.should == Float::INFINITY
end
it 'returns nil for all beginless ranges if the start is numeric' do
(...'o').size.should == nil
end
it 'returns nil if the start and the end is both nil' do
(nil..nil).size.should == nil
end
end
it "returns nil if first and last are not Numeric" do
(:a..:z).size.should be_nil

3
test/ruby/test_range.rb
View file

@ -777,6 +777,9 @@ class TestRange < Test::Unit::TestCase
assert_equal 5, (1.1...6).size
assert_equal 42, (1..42).each.size
assert_nil ("a"..."z").size
assert_nil ("a"...).size
assert_nil (..."z").size # [Bug #18983]
assert_nil (nil...nil).size # [Bug #18983]
assert_equal Float::INFINITY, (1...).size
assert_equal Float::INFINITY, (1.0...).size