[Bug c++/40752] -Wconversion: do not warn for operands not larger than target type

[joseph at codesourcery dot com]

------- Comment #10 from joseph at codesourcery dot com  2009-07-15 14:15 -------
Subject: Re:  -Wconversion: do not warn for operands not larger
 than target type

On Wed, 15 Jul 2009, ian at airs dot com wrote:

> Sure, it can wrap, but -Wconversion is not for wrapping warnings.

It's for warnings about implicit conversions changing a value; the 
arithmetic, in a wider type (deliberately or otherwise), does not wrap, 
but the value gets changed by the implicit conversion back to char.  If 
the user had explicit casts to int in their arithmetic, there could be no 
doubt that the warning is appropriate.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40752