QChar isSymbol, if "[" isn't a symbol what is it?

[SPlatten]

The documentation for isSymbol isn't that clear, I would have thought that any character that is not a space, number or letter must be a symbol, but it appears not.

[Christian Ehrlicher]

QChar::isSymbol() returns true when it's in one of the four categories:

QChar::Symbol_Math 26 Unicode class name Sm
QChar::Symbol_Currency 27 Unicode class name Sc
QChar::Symbol_Modifier 28 Unicode class name Sk
QChar::Symbol_Other 29 Unicode class name So

But the left bracket is in category Ps: https://www.fileformat.info/info/unicode/char/005b/index.htm (QChar::Punctuation_Open)

So nothing which Qt can do against.

[farteryhr]

so there's also .isPunct() to check for punctuation.