QRegularExpression not matching https://www.regextester.com/

Laurent Schall

I am trying to describe a QRegularExpression for matching the following string: <TEST>:/My-System/Mechanical/General Design (A123).para/query?column=Name</TEST> is it working in https://www.regextester.com/ with <TEST>([a-zA-Z0-9 :/.?_&=\-]+)<\/TEST> but seems not to work with QRegularExpression.

I guess I have some issues

or with the parentheses (A123) described as ( and )
or with the minus sign My-System described as -
or with the backslash </TEST> described as </TEST>

My regular expression <TEST>([a-zA-Z0-9 :/.?_&=\-]+)<\/TEST> is working to test <TEST>:/My-System/Mechanical/General Design (A123).para/query?column=Name</TEST> in https://www.regextester.com/ but not in my Qt application.

aha_1980

Hi @Laurent-Schall,

have you tried adding the separators ^ and $ to your regex?

or with the backslash </TEST> described as </TEST>

Note: that's no backslash, but a forward slash. Backslashes you would indeed have to escape in a C++ string.

Regards

VRonin

@Laurent-Schall said in QRegularExpression not matching https://www.regextester.com/:

it working in https://www.regextester.com/ with <TEST>([a-zA-Z0-9 :/.?_&=\-]+)<\/TEST>

If you input that in https://regex101.com/ it shows you what the error is. you are missing one escape. The correct regexp is <TEST>([a-zA-Z0-9 :\/.?_&=\-]+)<\/TEST> that goes into your code as something like const QRegularExpression testExp(QStringLiteral(R"**(<TEST>([a-zA-Z0-9 :\/.?_&=\-]+)<\/TEST>)**"));

SGaist

Hi,

To add to my fellow, you also have the QRegularExpression tool example that you can use to build and test regular expressions.