blob: 7b464707e5957b43346789089f3289d54f03a5b0 (
plain) (
blame)
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
65
66
67
68
69
70
71
72
73
74
|
definition module backendsupport
//1.3
from StdArray import size, size_u
//3.1
/*2.0
from StdArray import size, usize
0.2*/
from StdFunc import `bind`
from StdInt import +, ==
import utilities
identity
:== \x -> x
// binding sugar
(==>) infix
(==>) f g
:== f `bind` g
// o` :== flip o
(o`) infixr
(o`) f g
:== \x -> g (f x)
(:-) infixl
(:-) a f
:== f a
foldState function list
:== foldState list
where
foldState []
= identity
foldState [hd:tl]
= function hd
o` foldState tl
foldStateA function array
:== foldStateA 0
where
arraySize
= size array
foldStateA index
| index == arraySize
= identity
// otherwise
= function array.[index]
o` foldStateA (index+1)
foldStateWithIndexA function array
:== foldStateWithIndexA 0
where
arraySize
= size array
foldStateWithIndexA index
| index == arraySize
= identity
// otherwise
= function index array.[index]
o` foldStateWithIndexA (index+1)
foldrA function result array
:== foldrA 0
where
arraySize
= size array
foldrA index
| index == arraySize
= result
// otherwise
= function array.[index] (foldrA (index+1))
|
