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[Bug c++/26167] -Wconversion fails to detect signedness conversion from int to unsigned int in fuction call
- From: "lopezibanez at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Sep 2006 01:08:09 -0000
- Subject: [Bug c++/26167] -Wconversion fails to detect signedness conversion from int to unsigned int in fuction call
- References: <bug-26167-12152@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from lopezibanez at gmail dot com 2006-09-16 01:08 -------
In which way gcc reports the problem correctly? What gcc currently reports is
that if the prototype were missing the value would be passed as a signed int.
It is not warning you about the conversion, it warns you about the effect of
having a prototype.
If you mean that gcc (and g++) should warn that a signed variable is passed to
a function that expects an unsigned variable, then when using the -Wcoercion
flag (provided by the Wcoercion project [*]), both cc1 and cc1plus report:
pr26167.cpp:10: warning: coercion to 'unsigned int' from 'int' may alter its
value
[*] http://gcc.gnu.org/wiki/Wcoercion
--
lopezibanez at gmail dot com changed:
What |Removed |Added
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CC| |lopezibanez at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26167