[Bug c++/42810] Enumeration with sequential values has its for-loop exit condition optimized out.

[tony3 at GarlandConsulting dot us]

------- Comment #23 from tony3 at GarlandConsulting dot us  2010-01-28 17:16 -------
Jonathan,

Thanks for explaining that operation outside the norm is unspecified such
that the compiler can do anything and everything.

>I think a warning for this would be helpful, but asking for the compiler to
>assume types can have values that they can't have is not a good idea.

In the absence of making enumerations more useful (in the standard--which is
unlikely), I completely agree: a warning would be helpful.

Enough said by me.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42810