This is an abstract class that filters a pattern using a function. See subclasses below:
- FuncFilterPattern - Abstract class that filters a pattern using a function
- Pcollect - Apply a function to a pattern
- Pfset - Insert an environment into the event prototype before evaluating the supplied pattern
- Preject - Filters a source pattern by rejecting particular values.
- Pselect - Filters values returned by a source pattern.
- Pwhile - While a condition holds, repeatedly embed stream
FuncFilterPattern.new(func, pattern)
.func = value