[Bug c++/45829] Unary minus on static const class variable triggering linker error

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45829

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-09-30 08:10:39 UTC ---
(In reply to comment #8)
> 
> But -a (or 0.0-a) is not a constant expression, so having an in-class
> initializer seems suspicious, couldn't we warn at least?

Eh?  It could be used in a constant expression in a different translation unit.

> What happens if the
> definition is initialized to a different value?

Please read 9.4.2 again

4. ... The member shall still be defined in a name-space scope if it is used in
the program and the namespace scope definition SHALL NOT CONTAIN AN
INITIALIZER.