On Mon, Jun 05, 2006 at 11:17:24PM +0100, Valentin Samko wrote:

According to the documentation http://www.boost.org/doc/html/trim_copy.html one can not pass a range to boost::algorithm::trim_copy, and the sequence requirements must be met for the first parameter.

Considering how trim_copy_if is implemented, one can use it with ranges (for example, with boost::iterator_range). Is there any reason the documentation requires one to pass a sequence?

There is one operations, that requires sequence - Construction. You cannot construct and fill and arbitrary range. Yet you probably could use iterator_range with this algorithm. The algorithm does not require full seuqence reuirement, however there is no other standard concept at hand, that includes all the needed stuff.

Is there any safe and documented way to trim a range, i.e. having two iterators (begin, end) get a trimmed subrange?

I was considering this possibility, but it is not there yet. You can use boost::detail::trim_begin and boost::detail::trim_end. But these are not documented, nor officialy supported. Regards, Pavol.