blob: d5a25cad3984c435fbf14db1ff507d5e806ace74 (
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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
(.module:
[lux #- nat int deg]
(lux [function]
(data (coll [list "list/" Fold<List>])))
[//reference #+ Register Variable Reference])
(type: #export #rec Primitive
#Unit
(#Bool Bool)
(#Nat Nat)
(#Int Int)
(#Deg Deg)
(#Frac Frac)
(#Text Text))
(type: #export Tag Nat)
(type: #export (Composite a)
(#Sum (Either a a))
(#Product [a a]))
(type: #export #rec Pattern
(#Simple Primitive)
(#Complex (Composite Pattern))
(#Bind Register))
(type: #export (Branch' e)
{#when Pattern
#then e})
(type: #export (Match' e)
[(Branch' e) (List (Branch' e))])
(type: #export Environment
(List Variable))
(type: #export (Special e)
{#extension Text
#parameters (List e)})
(type: #export #rec Analysis
(#Primitive Primitive)
(#Structure (Composite Analysis))
(#Reference Reference)
(#Case Analysis (Match' Analysis))
(#Function Environment Analysis)
(#Apply Analysis Analysis)
(#Special (Special Analysis)))
(type: #export Branch
(Branch' Analysis))
(type: #export Match
(Match' Analysis))
(do-template [<name> <tag>]
[(template: #export (<name> content)
(<tag> content))]
[control/case #Case]
)
(do-template [<name> <type> <tag>]
[(def: #export <name>
(-> <type> Analysis)
(|>> <tag> #Primitive))]
[bool Bool #Bool]
[nat Nat #Nat]
[int Int #Int]
[deg Deg #Deg]
[frac Frac #Frac]
[text Text #Text]
)
(type: #export (Variant a)
{#lefts Nat
#right? Bool
#value a})
(type: #export (Tuple a) (List a))
(type: #export Application [Analysis (List Analysis)])
(def: (last? size tag)
(-> Nat Tag Bool)
(n/= (dec size) tag))
(template: #export (no-op value)
(|> +1 #//reference.Local #//reference.Variable #..Reference
(#..Function (list))
(#..Apply value)))
(do-template [<name> <type> <structure> <prep-value>]
[(def: #export (<name> size tag value)
(-> Nat Tag <type> <type>)
(let [left (function.constant (|>> #.Left #Sum <structure>))
right (|>> #.Right #Sum <structure>)]
(if (last? size tag)
(if (n/= +1 tag)
(right value)
(list/fold left
(right value)
(list.n/range +0 (n/- +2 tag))))
(list/fold left
(case value
(<structure> (#Sum _))
(<prep-value> value)
_
value)
(list.n/range +0 tag)))))]
[sum-analysis Analysis #Structure no-op]
[sum-pattern Pattern #Complex id]
)
(do-template [<name> <type> <primitive> <structure>]
[(def: #export (<name> members)
(-> (Tuple <type>) <type>)
(case (list.reverse members)
#.Nil
(<primitive> #Unit)
(#.Cons singleton #.Nil)
singleton
(#.Cons last prevs)
(list/fold (function (_ left right) (<structure> (#Product left right)))
last prevs)))]
[product-analysis Analysis #Primitive #Structure]
[product-pattern Pattern #Simple #Complex]
)
(def: #export (apply [func args])
(-> Application Analysis)
(list/fold (function (_ arg func) (#Apply arg func)) func args))
(type: #export Analyser
(-> Code (Meta Analysis)))
(do-template [<name> <type> <tag>]
[(def: #export (<name> value)
(-> <type> (Tuple <type>))
(case value
(<tag> (#Product left right))
(#.Cons left (<name> right))
_
(list value)))]
[tuple Analysis #Structure]
[tuple-pattern Pattern #Complex]
)
(do-template [<name> <type> <tag>]
[(def: #export (<name> value)
(-> <type> (Maybe (Variant <type>)))
(loop [lefts +0
variantA value]
(case variantA
(<tag> (#Sum (#.Left valueA)))
(case valueA
(<tag> (#Sum _))
(recur (inc lefts) valueA)
_
(#.Some {#lefts lefts
#right? false
#value valueA}))
(<tag> (#Sum (#.Right valueA)))
(#.Some {#lefts lefts
#right? true
#value valueA})
_
#.None)))]
[variant Analysis #Structure]
[variant-pattern Pattern #Complex]
)
(def: #export (application analysis)
(-> Analysis Application)
(case analysis
(#Apply head func)
(let [[func' tail] (application func)]
[func' (#.Cons head tail)])
_
[analysis (list)]))
(template: #export (pattern/unit)
(#..Simple #..Unit))
(do-template [<name> <tag>]
[(template: #export (<name> content)
(#..Simple (<tag> content)))]
[pattern/bool #..Bool]
[pattern/nat #..Nat]
[pattern/int #..Int]
[pattern/deg #..Deg]
[pattern/frac #..Frac]
[pattern/text #..Text]
)
|
