[Libreoffice-bugs] [Bug 144723] regular expression in find and replace is case insensitive

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=144723

--- Comment #9 from Mike Kaganski <mikekaganski at hotmail.com> ---
For the reference:

LibreOffice uses ICU regex engine. You may look at 'Case Insensitive Matching'
in its help page [1]. It reads:

> Case insensitive matching is specified by the UREGEX_CASE_INSENSITIVE flag
> during pattern compilation ...

This is ~same for any other regex engines: software defines case sensitivity
applied to *compiled regex*; and then user *may* re-define the flags inside the
regex.

You seem to not be familiar with this concept, but you may look at
re.IGNORECASE flag in Python's regex [2] doing the same when passed to its
compile.

So the checkbox in the dialog controls just that, and it is consistent and
correct.

[1]
https://unicode-org.github.io/icu/userguide/strings/regexp.html#case-insensitive-matching
[2] https://docs.python.org/3/library/re.html#re.I

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