> On 10 Oct 2022, at 11:55, Volker Hilsheimer via Development > <development@qt-project.org> wrote: > > Hi, > > > We are using `#pragma once` in a number of examples and tests in the Qt > source tree, but I don’t think we have officially endorsed it in favour of > explicit include guards. > > #pragma once is “non-standard but widely supported” [1], with some caveats, > e.g. when there are multiple header files with the same name (which each > compiler then handles differently, as there is no standard). > > From what I see, it should in practice be ok to use. But perhaps I’m missing > something. Does anything speak against using ‘#pragma once’ in new files?
Just for reference, we are using it without issues in Qt Creator since 2016. (But of course our platform and compiler requirements are more restricted than for Qt.) -- Eike Ziller Principal Software Engineer The Qt Company GmbH Erich-Thilo-Straße 10 D-12489 Berlin eike.zil...@qt.io http://qt.io Geschäftsführer: Mika Pälsi, Juha Varelius, Jouni Lintunen Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B _______________________________________________ Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development
