before and after functions need a way to specify a `type`

Created by: jcrugzz

@yawnt there is no way to currently splice in before or after functions currently as there is no general this.passes. We have passes for either web or ws which needs to be specified in some manner.

What do you think is the cleanest way to do so? We could pass a type parameter to the before and after functions as the first argument but that seems suboptimal.