[GiNaC-list] Use of STL iterators in GiNaC

Pierangelo Masarati masarati at aero.polimi.it
Thu Apr 16 14:34:18 CEST 2009

Jens Vollinga wrote:
> Hi,
> Michael Goffioul schrieb:
>> I'm currently tracking down these issues by running the test
>> suite in the source package, but this might not catch all of them.
>> If you are interested, I can send a patch once I succeed to run
>> the test suite completely.
> yes, that would be interesting! I'd like to see where this happens. I 
> don't have access to a VC compiler to try it myself, though.
> I see no problem with dereferencing end(), and doing operations like 
> end()+<integer>. In that case, end() should return a proper iterator as 
> a temporary and on these the operations +,- are defined (somewhere 
> 24.1.5 in the standard, I believe). But maybe there is a ++ or -- involved?

As far as I recall, end() cannot be dereferenced, but only used to test 
for out-of-range.  In any case, to track problems run-time with 
libstdc++, you can enable specific debug mode (see 
<http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug_mode.html>, thanks 
to Marco Morandini for pointing it out).  I do not recall any 
compile-time tests available with g++.

Cheers, p.

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