Markus Schöpflin wrote:
The Tru64/CXX std library implements copy as:
while (first != last) *result++ = *first++;
XPressive uses copy in format_backref_ like this:
else if(BOOST_XPR_CHAR_(char_type, '&') == *cur) // whole match { ++cur; out = std::copy( this->sub_matches_[ 0 ].first, this->sub_matches_[ 0 ].second, out); }
This results in calls of the post increment operator of case_converting_iterator, which returns a copy of the iterator object. The assignment operator then modifies this copy and not the original iterator, nullifying the changes done to the iterator object in the assignment operator.
The test executes OK when I replace the implementation of copy with the following code:
while (first != last) { *result = *first; ++first; ++result; }
Ah, ha! A million thanks Markus! I'll find a work around. And credit you for your help, of course. -- Eric Niebler Boost Consulting www.boost-consulting.com