Re: [boost] [mpl]iter_fold_if Forward Backward rationale?

18 May 2009

      AMDG

David Abrahams wrote:
...
on Sun Apr 05 2009, Larry Evans <cppljevans-AT-suddenlink.net> wrote:
...
Just as the ForwardPredicate is "augmented" with protection
against dereferencing the end<numbers>::type in this code:
https://svn.boost.org/trac/boost/browser/trunk/boost/mpl/iter_fold_if.hpp#L4...
shouldn't the BackwardPredicate also be augmented with the same
protection here:
https://svn.boost.org/trac/boost/browser/trunk/boost/mpl/iter_fold_if.hpp#L7...
Well, it doesn't need to be; if it did, tests and uses wouldn't compile
;-)
Alas.  AFAICT, there are no tests or uses for the Backward Predicate in MPL.

In Christ,
Steven Watanabe