The ISO 14651, and indirectly the Unicode update, have sparked some debate over the canonical use of [a-z] by developers. https://sourceware.org/bugzilla/show_bug.cgi?id=23420 …, https://sourceware.org/bugzilla/show_bug.cgi?id=23393 …
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@FakeUnicode It would be nice to have equivalence class ranges. Like [=0-9=]? It expands to accept all 9's instead of just stopping at 9, or forcing you to work through each equivalence class.3 replies 0 retweets 1 likeShow this thread -
Replying to @CarlosODonell @FakeUnicode
POSIX already has something syntactically close to this, equivalence classes, i.e. [[=0=]-[=9=]], but "An equivalence class expression used as a starting or ending point of a range expression produces unspecified results."
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Replying to @RichFelker @FakeUnicode
Is there an implementation under which it works? It would have to expand =0= and then =9= and then find the widest range (which is also unspecified) of COE or collation sequence or something.
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Not that I know of. At first I thought it was supposed to work, but checked and found it's not specified.
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