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From: Max Weinberg (max.weinberg_at_[hidden])
Date: 2005-06-01 16:06:53
Hi,
here is some workaround I have written to get around the begin/end issue. It
helps to avoid cluttering the code with nasty ifdefs when coding for
multiple compilers. Maybe someone finds it useful.
To use it, you have to write:
for ( typename Matr::iterator1 it1 = a.begin1(); it1 != a.end1(); ++it1 )
{
for ( typename Matr::iterator2 it2 = getBegin<Matr>(it1) ; it2 !=
it1.getEnd<Matr>(it2); ++it2 )
{...}
}
Additional performance hint: When iterating over a constant matrix, don't
use a call to end() in the conditional expression of the for statement. The
position of end() would be re-calculated every time the condition is
checked, although it never changes. Write instead:
const typename Matr::const_iterator1 aend1 = a.end1();
for ( typename Matr::const_iterator1 it1 = a.begin1(); it1 != aend1;
++it1 )
{...}
Regards, Max
begin 666 begin_end_wrapper.h
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`
end