------- Additional Comments From fw at deneb dot enyo dot de  2005-01-09 23:07 
-------
There's no multiplication in the source code.  The multiplication is an
implementation detail.  You can hardly use it to justify the semantics of the
operation.

I would expect that std::bad_alloc is thrown.  But I agree that the C++ standard
isn't very clear in this area.  The implementation must ensure that the
postcondition in 5.3.4(10) holds, but the standard doesn't provide a means to
signal failure.  I'm going to post a note to comp.std.c++ on this matter, but
hopefully this will be fixed in GCC as a quality of implementation issue.

The necessary overflow check is should be very cheap because the multiplication
is always by a constant.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19351

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