"Caleb Epstein" <caleb.epstein@gmail.com> writes:
I've recently wondered why std::copy doesn't have an analogous std::copy_if:
template<class InIt, class OutIt, class Pr> OutIt *copy_if*(InIt first, InIt last, OutIt dest, Pr pred);
that would copy elements to dest where the predicate returns true. Not unlike "grep" in Perl and "filter" in Python.
The same goal can be achieved with std::remove_copy_if and the use of a sense-reversed predicate, but this leads to confusing code IMHO.
Why wouldn't this be part of the Standard Library, or am I missing something ridiculously obvious?
This is the wrong forum for this question. Please take it to an appropriate mailing list or newsgroup, such as c.l.c++.m I don't see why anyone would knowingly start a thread with [off-topic] in the subject line. http://boost.org/more/discussion_policy.htm: Off-topic posts Discussions which stray from the acceptable topics are strongly discouraged. While off-topic posts are often well meaning and not as individually corrosive as other abuses, cumulatively the distraction damages the effectiveness of discussion. -- Dave Abrahams Boost Consulting www.boost-consulting.com