blob: dd2b0b0302f22e4d1277ea2c65ec9ebb10a13598 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
... Inspired by;
... "The Different Aspects of Monads and Mixins" by Bruno C. d. S. Oliveira
(.using
[library
[lux (.full)
[abstract
[monoid (.only Monoid)]
[predicate (.only Predicate)]
[monad (.only Monad do)]]]])
(type: .public (Mixin i o)
(-> (-> i o) (-> i o) (-> i o)))
(def: .public (fixed f)
(All (_ i o) (-> (Mixin i o) (-> i o)))
(function (mix input)
((f mix mix) input)))
(def: .public nothing
Mixin
(function (_ delegate recur)
delegate))
(def: .public (mixed parent child)
(All (_ i o) (-> (Mixin i o) (Mixin i o) (Mixin i o)))
(function (_ delegate recur)
(parent (child delegate recur) recur)))
(implementation: .public monoid
(All (_ i o) (Monoid (Mixin i o)))
(def: identity ..nothing)
(def: composite ..mixed))
(def: .public (advice when then)
(All (_ i o) (-> (Predicate i) (Mixin i o) (Mixin i o)))
(function (_ delegate recur input)
(if (when input)
((then delegate recur) input)
(delegate input))))
(def: .public (before monad action)
(All (_ ! i o) (-> (Monad !) (-> i (! Any)) (Mixin i (! o))))
(function (_ delegate recur input)
(do monad
[_ (action input)]
(delegate input))))
(def: .public (after monad action)
(All (_ ! i o) (-> (Monad !) (-> i o (! Any)) (Mixin i (! o))))
(function (_ delegate recur input)
(do monad
[output (delegate input)
_ (action input output)]
(in output))))
(type: .public (Recursive i o)
(-> (-> i o) (-> i o)))
(def: .public (of_recursive recursive)
(All (_ i o) (-> (Recursive i o) (Mixin i o)))
(function (_ delegate recur)
(recursive recur)))
|
