Forrídan

forridan Old English. strong verb. to intercept by riding before

A transducer based interceptor library. Focused on a single-pass approach (no :before/:after distinction), using lenses to pull interceptor arguments from the context and mixing sync and async interceptor fns.

WIP

Currently at the proof of concept stage. Right now both dependency libraries (eft, an iteration library using the transducer machinery and soliton, a transducer based lens library) are in the project but will be broken out once it’s past the proof of concept stage

Roadmap

eft

• [X] iterate transducer
• [X] produce convenience fn
• [X] reductions transducer
• [-] common fns to halt iteration
  • [X] on nil
  • [X] at fixed point
  • [X] on exception
  • [ ] try step-fn wrapper to return caught exception
  • [ ] on predicate fn
• [ ] async update fn handling
  • [ ] promise-chan
  • [ ] manifold
  • [ ] deferrable
• [ ] top level API design

soliton

• [X] basic protocol
• [X] basic types
  • [X] keywords
  • [X] fns
  • [X] integers
  • [X] vectors of basic types (lens composition)
• [X] API fns
• [X] lens constructors
  • [X] default (getter fn, updater fn)
  • [X] getter/setter variant
  • [X] units lens
• [-] included lenses
  • [-] sequence lenses
    • [X] nth
    • [X] first
    • [X] second
    • [ ] next/rest
    • [ ] pop
    • [ ] peek
    • [ ] last
    • [ ] butlast
    • [X] vector slice
  • [-] map lenses
    • [X] select-keys
    • [ ] keys
    • [ ] vals
  • [ ] predicate lens
  • [ ] dissocing with put/over?
• [ ] async update fns
• [ ] derived atoms
• [ ] mirror/reflect (over variant w/ multiple lenses for update fns with arity > 1)

forridan

• [ ] basic map context execution
• [ ] vec/list context variants
• [ ] async interceptor support
• [ ] convenience macro for defining interceptors and associated lenses
• [ ] flock support (interceptor stacks represented as zipper)
• [ ] threading macro allowing mixed async/sync fns
• [ ] spec magic threading (using names of function specs to infer location of arguments in contexts)