http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51013
--- Comment #9 from Marc Glisse <marc.glisse at normalesup dot org> 2011-11-08 15:51:52 UTC --- (In reply to comment #8) > I meant that with the current libstdc++ complex, this is valid: > > constexpr float f = complex<float>(2.4).real(); > > but adding a non-constexpr overload would cause that one to be selected for > the > call above, making the declaration invalid. Ah, yes, thank you. > Once we have ref-qualifiers, it should be OK to add the non-const overload > with > an lvalue ref-qualifier, though. Assuming we want to provide this extension :-)
