Is there principal difference between QRegularExpression and QRegExp?

bogong

Hello!
Which is better to use QRegularExpression and QRegExp? Is there principal difference between this two classes?

mrjj

Hi
You should use QRegularExpression
Docs says
Note: In Qt 5, the new QRegularExpression class provides a Perl compatible implementation of regular expressions and is recommended in place of QRegExp.

So i guess the biggest difference is its compatibility

SGaist

Hi,

QRegExp is a custom regular expression implementation.
QRegularExpression uses PCRE as a backend.
Also, QRegExp should be considered deprecated and not used in new code.