----- Original Message ----- From: "Jonathan Turkanis" <technews@kangaroologic.com>
I don't see why this is better than
struct toupper_filter : input_filter { template<typename Source> int get(Source& src) { return toupper(boost::io::get(src)); } };
and its cousins.
Then that pretty much closes the discussion. If you do not see the benefits of the lower complexity, then there really is little more I can do to convince you otherwise.
int main() { fstream("input.txt") > Filter(ToUpper); }
This won't work, since fstream("input.txt") produces a temporary object which cannot be used to initialize a non-const reference. Therefore operator< would have to be declared to take a const reference, and the non-const extraction functions would not be usable.
I already made it work by creating temporary helper objects which take the address of the temporary objects.
I have to go no, but I'll continue this discussion later.
CD