Bug #11284: String#upcase and String#downcase don't work for accented characters

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN

[pabloh (Pablo Herrero)]

Many accented and other non-english characters fails to upcase/downcase properly.
Accented characters is the most common are the ones I keep stumbling upon,, but probably other germanic/nordic characters I'm not aware of have the same problems.

For example:

"Hola, ¿Cómo estás?".upcase         # returns "HOLA, ¿CóMO ESTáS?"
"CONFIANÇA".downcase                # returns "confianÇa"
"Un moment s'il vous plaît".upcase  # returns "UN MOMENT S'IL VOUS PLAîT"

[0x0dea (D.E. Akers)]

http://stackoverflow.com/a/4418681

It would be unreasonable to add natural language processing to Ruby for the sake of a few methods, and it's easy to argue the case for not doing it at all over doing it incorrectly.

[duerst (Martin Dürst)]

• Is duplicate of Feature #10085: Add non-ASCII case conversion to String#upcase/downcase/swapcase/capitalize added

[duerst (Martin Dürst)]

• Status changed from Open to Closed

Closing because this is being worked on (slowly) as #10085, which is already accepted.

[usa (Usaku NAKAMURA)]

• Status changed from Closed to Rejected

This status "rejected" does not mean this report is rejected.
This change is only to unify the tickets.