I'd say it's generally better to use QDir::filePath there. it will be easier to read.

Unfortunately QTemporaryDir doesn't have filePath() method. But it's a good idea to add it :)

Ugh, I was convinced it would exist! My apologies for not checking.

For now, can you at least just change from "/" -> QLatin1Char('/')?
Also if you can look into adding the API to Qt that would be great as well.

Other than that, +1

Add QTemporaryDir::filePath(): https://codereview.qt-project.org/#/c/160366/

"/" are placed before macros that expand to string literals
it's a string literal concatenation, there is no need to change them to QLatin1Char('/')