[Bug c++/44673] static const variable works in if/else, fails at linking in ternary

[manu at gcc dot gnu dot org]

------- Comment #14 from manu at gcc dot gnu dot org  2010-06-26 10:53 -------
> (In reply to comment #12)
> > So is g++ accepting invalid code?
> 
> Yes, but it's a violation of the ODR, no diagnostic is required (it's not
> possible to tell until link time that there's no definition.) 
> 
> There are DOZENS of duplicates of this bug, they are all invalid.

However, it links in the if-else case. I understand that ?: may be used as a
lvalue, but in this case, it is not and the value may be inlined in the same
way as in if-else (I guess that is what Andrew's patch did). If the standard is
clear that this should not work, then so be it. 

Let's close this as INVALID, because I don't know how we could improve the
diagnostics here to help users. I wish we could but I cannot see how it can be
done. I guess that would require an integrated super-smart linker, I wonder if
the LLVM project is going to suggest that next?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44673