<![CDATA[Qt regex modifier]]>I'm trying to use a regex that uses \u modifier:

(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))

It would match strings like .com, the tld of an url, but when I call isValid() it returns false and when running I got this warning:

QRegularExpressionPrivate::doMatch(): called on an invalid QRegularExpression object

Is there a solution? What can I be doing in order to solve this?

]]>https://forum.qt.io/topic/61919/qt-regex-modifierRSS for NodeTue, 12 May 2026 22:04:53 GMTSun, 20 Dec 2015 01:33:43 GMT60<![CDATA[Reply to Qt regex modifier on Mon, 21 Dec 2015 00:21:00 GMT]]>Hi,

To help you with your regular expression development, you can use the regular expression tool. It's available starting with Qt 5.6

]]>https://forum.qt.io/post/303694https://forum.qt.io/post/303694Mon, 21 Dec 2015 00:21:00 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:47:58 GMT]]>@mrjj Yes, it resembles perl style, it's called PCRE.

]]>https://forum.qt.io/post/303651https://forum.qt.io/post/303651Sun, 20 Dec 2015 15:47:58 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:46:18 GMT]]>@Minupi
Good to hear. :)
It says its perl syntax but maybe PHP uses perl style or reverse?

]]>https://forum.qt.io/post/303650https://forum.qt.io/post/303650Sun, 20 Dec 2015 15:46:18 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:44:40 GMT]]>@mrjj Thank you, helped a lot. I realised that QRegularExpression is using the same syntax as PHP.

]]>https://forum.qt.io/post/303649https://forum.qt.io/post/303649Sun, 20 Dec 2015 15:44:40 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:43:36 GMT]]>@Minupi
Oh yes always escape "\"
Super- :)

]]>https://forum.qt.io/post/303648https://forum.qt.io/post/303648Sun, 20 Dec 2015 15:43:36 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:42:12 GMT]]>@mrjj I fixed it, and it's working now... You just have to escape the \x, like \\x, for instance: [a-z\\x{00a1}-\\x{ffff}0-9]*.

]]>https://forum.qt.io/post/303647https://forum.qt.io/post/303647Sun, 20 Dec 2015 15:42:12 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:36:04 GMT]]>@mrjj Yes, I did and I got an error saying:

hex constants must have at least one hex digit

]]>https://forum.qt.io/post/303646https://forum.qt.io/post/303646Sun, 20 Dec 2015 15:36:04 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:21:01 GMT]]>@yodusow-bardon said:
btw
did u try
\x{FFFF}

]]>https://forum.qt.io/post/303645https://forum.qt.io/post/303645Sun, 20 Dec 2015 15:21:01 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:13:57 GMT]]>@mrjj It's kinda nonsense as QRegularExpresion came to be better than QRegExp, but anyway, let's stick with it as it's the only option left here.

Thank you.

]]>https://forum.qt.io/post/303643https://forum.qt.io/post/303643Sun, 20 Dec 2015 15:13:57 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:07:41 GMT]]>@Minupi said:
Well if it just accepts a \u I agree it seems more sensible than to figure out how to do \u like with QRegularExpression.

]]>https://forum.qt.io/post/303641https://forum.qt.io/post/303641Sun, 20 Dec 2015 15:07:41 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 15:04:33 GMT]]>@mrjj I might, but the thing is that I need to use \u as it has a range: \uffff0-9.

I think that I'm going to drop the QRegularExpression and use QRegExp instead.

]]>https://forum.qt.io/post/303640https://forum.qt.io/post/303640Sun, 20 Dec 2015 15:04:33 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 14:52:08 GMT]]>@Minupi said:
hmm looking in
qregularexpression.cpp
I only see
QT_TRANSLATE_NOOP("QRegularExpression", "PCRE does not support \L, \l, \N{name}, \U, or \u"),

but at same time docs says "It fully supports Unicode"

Does it work if u put the unicode directly in the string ?

]]>https://forum.qt.io/post/303638https://forum.qt.io/post/303638Sun, 20 Dec 2015 14:52:08 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 14:42:55 GMT]]>@mrjj I tried it too and it doesn't work. I my case I tried - it would match anything, including unicode characters:

[a-z\u00a1-\uffff0-9]*

And when calling isValid it returns false along with the same warning, even using UseUnicodePropertiesOption.

]]>https://forum.qt.io/post/303635https://forum.qt.io/post/303635Sun, 20 Dec 2015 14:42:55 GMT<![CDATA[Reply to Qt regex modifier on Sun, 20 Dec 2015 09:02:56 GMT]]>@yodusow-bardon said:

Hi
I wonder if
QRegularExpression::UseUnicodePropertiesOption 0x0040
http://doc.qt.io/qt-5/qregularexpression.html
is what you are after?

]]>https://forum.qt.io/post/303600https://forum.qt.io/post/303600Sun, 20 Dec 2015 09:02:56 GMT