Case insensitive search and regex

[ritmation]

It seems that case insensitive search with regex option enabled works only with ASCII characters.

For example, if you enter the following text into a document:

"Ä, Ö, Ü on a German computer keyboard"

and then try to search for "ä" with "Regular expression search" enabled and "Match case" disabled, the search terminates with a message "The specified text was not found."

Expected behavior: searching for lowercase "ä" with "Match case" option disabled should also find uppercase "Ä" if the option "Match case" is disabled, regardless of whether normal or regex search if performed.

[zufuliu]

Yes, this is the limitation of Scintilla's builtin POSIX regex.