http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53598
Bug #: 53598
Summary: missed diagnostics / equality comparison result
unused.
Classification: Unclassified
Product: gcc
Version: 4.7.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: pl...@agmk.net
i've found in my codebase a hidden typo bug.
#include <list>
void foo( std::list<int>::const_iterator& i, std::list<int> const& l )
{
if ( ++i == l.end() )
i == l.begin(); <=== here
}
g++ with -Wall -Wextra doesn't warn about this while clang++ wins:
noop-if.cpp:5:5: warning: equality comparison result unused
[-Wunused-comparison]
i == l.begin();
~~^~~~~~~~~~~~
noop-if.cpp:5:5: note: use '=' to turn this equality comparison into an
assignment
i == l.begin();
^~
=
1 warning generated.
