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Date: Tue, 18 Nov 2008 22:14:00 -0000
Subject: [Bug c++/38172]  New: warn_unused_result does not work with structs not containing a copy constructor
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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Take:
struct MyClass
{
};

typedef struct MyClass MyClass;

int Bar1( void ) __attribute__((warn_unused_result)) __attribute__((noinline));
MyClass Bar2( void ) __attribute__((warn_unused_result))
__attribute__((noinline));

int Bar1( void )
{
    return 0;
}

MyClass Bar2( void )
{
}

void Foo( void )
{
    Bar1(); // Warns
    Bar2(); // Does not warn
}
--- CUT ---
In Foo, Bar1 and Bar2 should cause a warning, only Bar1 causes a warning with
the C++ front-end.  While both cause a warning to show up with the C front-end.


-- 
           Summary: warn_unused_result does not work with structs not
                    containing a copy constructor
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38172