From: jgomo3 via ruby-core <ruby-core@...>
Date: 2023-09-06T12:17:52+00:00
Subject: [ruby-core:114653] [Ruby master Bug#19864] Ruby 3.2 Changed Behavior With One Sided Ranges

Issue #19864 has been updated by jgomo3 (Jes�s G�mez).



File range_test_2.rb added

File range_test_3.rb added



I tested the idea with whole numbers, and it doesn't fail.



I tested the idea with dates not in the extremes, and it DOES fail.



Attached 2 examples.



The first one using numbers:



```

(..0) === 0

```



Which works fine both in Ruby 3.1 and 3.2



The second one using different dates. In particular, checking if "yesterday" is in the range of "..today":



```

require 'date'



today = Date.today

yesterday = today - 1

(..today) === yesterday

```



And it fails in 3.2, but works fine in 3.1.



----------------------------------------

Bug #19864: Ruby 3.2 Changed Behavior With One Sided Ranges

https://bugs.ruby-lang.org/issues/19864#change-104482



* Author: Aesthetikx (John DeSilva)

* Status: Open

* Priority: Normal

* ruby -v: 3.3.0

* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

----------------------------------------

Thank you for taking the time to read my issue. I know there has been some previous discussion here https://bugs.ruby-lang.org/issues/19533 regarding a similar issue, although I think this is different. I apologize if this has already been addressed.



Prior to Ruby 3.2, you could use a beginless or endless range, and use === (or a case statement) to determine if a given date matched that range. For example, (..today) === yesterday would have returned true, and (tomorrow..) === today would have returned false. Please see my attached file for a more concrete example.



Starting with Ruby 3.2, this results in "`===': cannot determine inclusion in beginless/endless ranges (TypeError)".



I can imagine that there is difficulty and ambiguity with these infinite ranges and non numeric objects, however I do feel that these examples with dates should work, especially since (..Date.today).cover?(Date.today) still works as expected.



---Files--------------------------------

range_test.rb (928 Bytes)

range_test_2.rb (411 Bytes)

range_test_3.rb (162 Bytes)





-- 

https://bugs.ruby-lang.org/

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