Re: [Boost-users] [Range] Select forward or reverse traversal at compile time?

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What you are looking for is a reversing adaptor, hence you probably should look at boost::adaptors::reversed, please see http://www.boost.org/doc/libs/1_46_1/libs/range/doc/html/range/reference/ada....

No, the reversing adaptor doesn't work either. Remember I want to specify *at compile time* whether or not to reverse the range.

If hypothetically there was a "null" range adapter, I could do something like:

typedef boost::mpl::if_::type adaptor;

boost::copy( adaptor(range) , ...);

But that doesn't seem to exist either.

The Pstade Oven library (a Boost.Range extension library) has an "identity" adaptor: http://p-stade.sourceforge.net/oven/doc/html/oven/range_adaptors.html#oven.r... This library may one day become part of Boost.Range. Nate.