[Bug c++/67678] Nested class can be re-declared after definition

[daniel.kruegler at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67678

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

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--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
Personally I think that allowing this looks like a reasonable extension, but I
agree that using -pedantic this should be diagnosed (which it doesn't yet).