blob: 88c9b4bd78484be69066d30b606447189d8dba23 (
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
|
(.module:
[lux #*
[abstract
[monoid (#+ Monoid)]
[equivalence (#+ Equivalence)]
hash
[codec (#+ Codec)]]
[control
["." function]]])
(implementation: #export equivalence
(Equivalence Bit)
(def: (= x y)
(if x
y
(not y))))
(implementation: #export hash
(Hash Bit)
(def: &equivalence ..equivalence)
(def: (hash value)
(case value
#0 2
#1 3)))
(template [<name> <identity> <op>]
[(implementation: #export <name>
(Monoid Bit)
(def: identity <identity>)
(def: (compose x y) (<op> x y)))]
[disjunction #0 or]
[conjunction #1 and]
)
(implementation: #export codec
(Codec Text Bit)
(def: (encode x)
(if x
"#1"
"#0"))
(def: (decode input)
(case input
"#1" (#.Right #1)
"#0" (#.Right #0)
_ (#.Left "Wrong syntax for Bit."))))
(def: #export complement
{#.doc (doc "Generates the complement of a predicate."
"That is a predicate that returns the oposite of the original predicate.")}
(All [a] (-> (-> a Bit) (-> a Bit)))
(function.compose not))
|
