On 04/08/09 10:35, 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 ;-)
Just think about how you'd implement it and it should become obvious why.
David, With the change shown in attachment, the mpl tests passsed, as shown in the vault's: Template Metaprogramming/bjam.iter_fold_if_protected.out -regards, Larry P.S. AFAICT they passed because I saw no **failed** in the .out file.