blob: 0aae90108225cca1931b33f41278d2628549901c (
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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
datatype t = datatype Basis.list
val show = fn [a] (_ : show a) =>
let
fun show' (ls : list a) =
case ls of
[] => "[]"
| x :: ls => show x ^ " :: " ^ show' ls
in
mkShow show'
end
val rev = fn [a] =>
let
fun rev' acc (ls : list a) =
case ls of
[] => acc
| x :: ls => rev' (x :: acc) ls
in
rev' []
end
val revAppend = fn [a] =>
let
fun ra (ls : list a) acc =
case ls of
[] => acc
| x :: ls => ra ls (x :: acc)
in
ra
end
fun append [a] (ls1 : t a) (ls2 : t a) = revAppend (rev ls1) ls2
fun mp [a] [b] f =
let
fun mp' acc ls =
case ls of
[] => rev acc
| x :: ls => mp' (f x :: acc) ls
in
mp' []
end
fun mapPartial [a] [b] f =
let
fun mp' acc ls =
case ls of
[] => rev acc
| x :: ls => mp' (case f x of
None => acc
| Some y => y :: acc) ls
in
mp' []
end
fun mapX [a] [ctx ::: {Unit}] f =
let
fun mapX' ls =
case ls of
[] => <xml/>
| x :: ls => <xml>{f x}{mapX' ls}</xml>
in
mapX'
end
fun mapM [m ::: (Type -> Type)] (_ : monad m) [a] [b] f =
let
fun mapM' acc ls =
case ls of
[] => return (rev acc)
| x :: ls => x' <- f x; mapM' (x' :: acc) ls
in
mapM' []
end
fun mapXM [m ::: (Type -> Type)] (_ : monad m) [a] [ctx ::: {Unit}] f =
let
fun mapXM' ls =
case ls of
[] => return <xml/>
| x :: ls =>
this <- f x;
rest <- mapXM' ls;
return <xml>{this}{rest}</xml>
in
mapXM'
end
fun filter [a] f =
let
fun fil acc ls =
case ls of
[] => rev acc
| x :: ls => fil (if f x then x :: acc else acc) ls
in
fil []
end
fun exists [a] f =
let
fun ex ls =
case ls of
[] => False
| x :: ls =>
if f x then
True
else
ex ls
in
ex
end
fun foldlMap [a] [b] [c] f =
let
fun fold ls' st ls =
case ls of
[] => (rev ls', st)
| x :: ls =>
case f x st of
(y, st) => fold (y :: ls') st ls
in
fold []
end
fun assoc [a] [b] (_ : eq a) (x : a) =
let
fun assoc' ls =
case ls of
[] => None
| (y, z) :: ls =>
if x = y then
Some z
else
assoc' ls
in
assoc'
end
fun search [a] [b] f =
let
fun search' ls =
case ls of
[] => None
| x :: ls =>
case f x of
None => search' ls
| v => v
in
search'
end
|
