How to create a regular expression for any string up to a maximum length?

[Guerrian]

This is what I tried to allow any string up to a maximum of 32 characters, but it does not work:

    QRegularExpression regExp("^.{,32}$");

In my same code this expression worked fine:

    QRegularExpression regExp("^[0-9]{0,8}$");

[raven-worx]

@Guerrian

then why not try the following ;)

QRegularExpression regExp("^[.]{0,32}$");

[aha_1980]

@Guerrian

It should already work if you change the pattern to

"^.{0,32}$"

Test: https://regex101.com/r/PN7hSo/1

@raven-worx: I tried your pattern in the online tester but it did not match :(

[raven-worx]

@aha_1980
odd, seems like "^[]" has some special meaning?
It works when [] is replaced with () though

[aha_1980]

@raven-worx said in How to create a regular expression for any string up to a maximum length?:

@aha_1980
odd, seems like "^[]" has some special meaning?

Don't ask me - in theory it should work :)

It works when [] is replaced with () though

Yeah, that creates a capture group around '.' and is needed if you want to re-use the result. Otherwise you can just use '.'

[JonB]

I assume [.] would just be the same as writing \.