Support one-time binding in ng-pluralize

[blaise-io]

I would expect this to work, but it doesn't:

<ng-pluralize count="::foo" when="{'0': 'zero', '1': 'one', 'other': 'many'}"></ng-pluralize>.

Example: http://plnkr.co/edit/iaFI3p?p=preview

Any plans to make this work?

[caitp]

I don't see why we couldn't make that work, I'll look at this next week, or this week if I have time.

[gkalpak]

@caitp: #10022 is my take on it.
I feel like there should be an easy way to find out whether an expression is a bindOnce or not. E.g. $parse could set a flag similar to literal/constant.
Right now, I checked that the epression starts with ::, but it doesn't feel DRY or right. Have I overlooked something ?