Class LCcond

Object
   |
   +--Lens
         |
         +--LCcond

class LCcond

extends Lens

Applies one of two lenses based on a predicate on the concrete tree. The lens to apply on putback is selected by running the predicate on the concrete tree again. Thus is lens is unoblivious, viz. dependent on the concrete tree during putback.

LCcond is typically applied for simple type dispatch; for more complex, structure-dependent conditionals, LAcond or LCond may be more appropriate.

- LAcond
- LCond

Field Detail

name

Object name

LCcond

LCcond(<Predicate> p, <Lens> pass_lens, <Lens> fail_lens)

Parameters:
p - A predicate on the concrete tree (a function, list, etc.)
pass_lens - The lens to run if p matches c
fail_lens - The lens to run if p does not match c

See:
- LAcond
- LCond

get

Object get(c)

putback

Object putback(a, c)