c++/10245: regression in 3.3, C++ ternary operator confuses type lookup
harri.pasanen@trema.com
harri.pasanen@trema.com
Thu Mar 27 17:55:00 GMT 2003
>Number: 10245
>Category: c++
>Synopsis: regression in 3.3, C++ ternary operator confuses type lookup
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Mar 27 17:06:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: harri.pasanen@trema.com
>Release: unknown-1.0
>Organization:
>Environment:
gcc version 3.3 20030326 (prerelease)
>Description:
// Ternary operator throws the type resolution of balance.
namespace Type
{
struct Date {
int foo;
};
};
typedef int fc_Date;
struct from_date
{
const fc_Date &_date;
from_date (const fc_Date &date) throw ()
: _date (date) {}
// Operator to convert to type date.
operator Type::Date () const throw ()
{ Type::Date tem;
return tem; }
private:
// Not implemented.
from_date ();
from_date (const from_date &);
};
fc_Date aday() { return 1; }
#ifdef BUG
void foo()
{
fc_Date adate, bdate;
Type::Date d = (aday () != 0 ? from_date (adate) : from_date (bdate));
}
#else
void foo()
{
fc_Date adate, bdate;
Type::Date d;
if (aday () != 0)
d = from_date (adate);
else
d = from_date (bdate);
}
#endif
>How-To-Repeat:
Save the code above to file gccbug.cxx
g++ -c -DBUG gccbug.cxx
will fail to compile it g++ is 3.3 snapshot 20030326, with the message:
gccbug.cxx: In function `void foo()':
gccbug.cxx:23: error: `from_date::from_date(const from_date&)' is private
gccbug.cxx:32: error: within this context
gccbug.cxx:23: error: `from_date::from_date(const from_date&)' is private
gccbug.cxx:32: error: within this context
The -DBUG can be used to illustrate the bug in 3.3 snapshot.
g++ 2.96, 3.0.4 and 3.2.2 all compile the example both with and without -DBUG.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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