[Bug c++/44500] [C++0x] Bogus narrowing conversion error

[gpiez at web dot de]

------- Comment #9 from gpiez at web dot de  2010-06-11 13:27 -------
I understand now after the implicit promotion to int of a non constant value
the result of the narrowing operation can't be guaranteed to fit in the
original type. But I still think it shouldn't give an error, and if the
standard says so, I think it is flawed in this regard ;-)

Consider

g<INT_MAX, INT_MAX>();  // Warning, but no Error

despite it can be proven that the value will not fit and this is very likely an
error. Opposing to

char c,d;
A a = { c+d };

which is very likely not an error and would only require a mild warning. IMHO.

Manuel, in your testcase, you do not only warn, you error out if compiled with
-std=c++0x.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44500