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From: "manu at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/35852] -Wconversion rejects bitwise negation and assignment, cannot cast around Date: Fri, 22 Aug 2008 13:55:00 -0000 [thread overview] Message-ID: <20080822135334.1925.qmail@sourceware.org> (raw) In-Reply-To: <bug-35852-3227@http.gcc.gnu.org/bugzilla/> ------- Comment #5 from manu at gcc dot gnu dot org 2008-08-22 13:53 ------- This is the current situation as of revision 139373. typedef unsigned short ushort; enum { FOO = 0x13 }; template <typename T> inline void andnot(T& lv, const T& rv) { lv &= ~rv; // -Wconversion int(lv) & ~(int(rv)) } int main(int, char*[]) { ushort x = 99; x = ~FOO; // -Wsign-conversion -20 -> unsigned short x &= ~FOO; // -Wconversion int(x) & ~(int(19)) -> unsigned short x = x & ~FOO; // -Wconversion int(x) & ~(int(19)) -> unsigned short x = x & ushort(~FOO); // no warning x = x & ushort(~ushort(FOO)); // no warning x &= static_cast<ushort>(~FOO); // no warning x &= ~x; // no warning andnot(x, ushort(FOO)); // instantiated from here return x; } I don't see what is wrong with the warnings. Would you mind elaborating? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35852
next prev parent reply other threads:[~2008-08-22 13:55 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-04-06 22:55 [Bug c++/35852] New: " fang at csl dot cornell dot edu 2008-04-18 15:08 ` [Bug c++/35852] " manu at gcc dot gnu dot org 2008-08-01 10:09 ` manu at gcc dot gnu dot org 2008-08-01 10:23 ` paolo dot carlini at oracle dot com 2008-08-01 17:55 ` manu at gcc dot gnu dot org 2008-08-22 13:55 ` manu at gcc dot gnu dot org [this message] 2008-08-29 3:39 ` manu at gcc dot gnu dot org 2008-08-29 4:56 ` fang at csl dot cornell dot edu 2008-10-23 1:50 ` manu at gcc dot gnu dot org
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