Mark call_with_view as unimplemented when appropriate
Mark call_with_view as unimplemented when appropriate

Ignore-this: ec446a1d32b2928bdd25278f897d03f6
The implementation is now only enabled if the underlying operation, after turning the ranges into views, is implemented.

darcs-hash:20141122212425-c9a90-43717c9a0d333318ee02df10b1c3a3b5e082f769

rogiervd/range,rogiervd/range,rogiervd/range