blob: b31a146a1d60e68dd6b93a703162bd8cacef6b82 (
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
|
(.module:
lux
(lux (control ["p" parser])
(data [maybe]
["e" error]
[number]
[product]
text/format
(coll [list "list/" Functor<List> Fold<List> Monoid<List>]
[dict #+ Dict]))
(macro [code]
["s" syntax]))
(luxc (lang ["la" analysis]
["ls" synthesis]
(synthesis [".S" case]
[".S" function]
[".S" loop])
[".L" variable #+ Variable])
))
(def: init-env (List Variable) (list))
(def: init-resolver (Dict Int Int) (dict.new number.Hash<Int>))
(def: (prepare-body inner-arity arity body)
(-> ls.Arity ls.Arity ls.Synthesis ls.Synthesis)
(if (functionS.nested? inner-arity)
body
(loopS.reify-recursion arity body)))
(def: (let$ register inputS bodyS)
(-> Nat ls.Synthesis ls.Synthesis ls.Synthesis)
(` ("lux let" (~ (code.nat register)) (~ inputS) (~ bodyS))))
(def: (if$ testS thenS elseS)
(-> ls.Synthesis ls.Synthesis ls.Synthesis ls.Synthesis)
(` ("lux if" (~ testS)
(~ thenS)
(~ elseS))))
(def: (function$ arity environment body)
(-> ls.Arity (List Variable) ls.Synthesis ls.Synthesis)
(` ("lux function" (~ (code.nat arity))
[(~+ (list/map code.int environment))]
(~ body))))
(def: (variant$ tag last? valueS)
(-> Nat Bool ls.Synthesis ls.Synthesis)
(` ((~ (code.nat tag)) (~ (code.bool last?)) (~ valueS))))
(def: (var$ var)
(-> Variable ls.Synthesis)
(` ((~ (code.int var)))))
(def: (procedure$ name argsS)
(-> Text (List ls.Synthesis) ls.Synthesis)
(` ((~ (code.text name)) (~+ argsS))))
(def: (call$ funcS argsS)
(-> ls.Synthesis (List ls.Synthesis) ls.Synthesis)
(` ("lux call" (~ funcS) (~+ argsS))))
(def: (synthesize-case arity num-locals synthesize inputA branchesA)
(-> ls.Arity Nat (-> Nat la.Analysis ls.Synthesis)
la.Analysis (List [la.Pattern la.Analysis])
ls.Synthesis)
(let [inputS (synthesize num-locals inputA)]
(case (list.reverse branchesA)
(^multi (^ (list [(^code ("lux case bind" (~ [_ (#.Nat input-register)])))
(^code ((~ [_ (#.Int var)])))]))
(not (variableL.captured? var))
(n/= input-register (variableL.local-register var)))
inputS
(^ (list [(^code ("lux case bind" (~ [_ (#.Nat register)]))) bodyA]))
(let$ (if (functionS.nested? arity)
(n/+ (n/dec arity) register)
register)
inputS
(synthesize (n/inc num-locals) bodyA))
(^or (^ (list [(^code true) thenA] [(^code false) elseA]))
(^ (list [(^code false) elseA] [(^code true) thenA])))
(if$ inputS (synthesize num-locals thenA) (synthesize num-locals elseA))
(#.Cons [lastP lastA] prevsPA)
(let [transform-branch (: (-> la.Pattern la.Analysis ls.Path)
(caseS.path arity num-locals synthesize))
pathS (list/fold caseS.weave
(transform-branch lastP lastA)
(list/map (product.uncurry transform-branch) prevsPA))]
(` ("lux case" (~ inputS) (~ pathS))))
_
(undefined)
)))
(def: (synthesize-apply synthesize num-locals exprA)
(-> (-> la.Analysis ls.Synthesis) Nat la.Analysis ls.Synthesis)
(let [[funcA argsA] (functionS.unfold-apply exprA)
funcS (synthesize funcA)
argsS (list/map synthesize argsA)]
(case funcS
(^multi (^code ("lux function" (~ [_ (#.Nat _arity)]) [(~+ _env)] (~ _bodyS)))
(and (n/= _arity (list.size argsS))
(not (loopS.contains-self-reference? _bodyS)))
[(s.run _env (p.some s.int)) (#e.Success _env)])
(` ("lux loop" (~ (code.nat (n/inc num-locals))) [(~+ argsS)]
(~ (loopS.adjust _env num-locals _bodyS))))
(^code ("lux call" (~ funcS') (~+ argsS')))
(call$ funcS' (list/compose argsS' argsS))
_
(call$ funcS argsS))))
(def: #export (synthesize expressionA)
(-> la.Analysis ls.Synthesis)
(loop [arity +0
resolver init-resolver
direct? false
num-locals +0
expressionA expressionA]
(case expressionA
(^code [(~ _left) (~ _right)])
(` [(~+ (list/map (recur arity resolver false num-locals)
(la.unfold-tuple expressionA)))])
(^or (^code ("lux sum left" (~ _)))
(^code ("lux sum right" (~ _))))
(let [[tag last? value] (maybe.assume (la.unfold-variant expressionA))]
(variant$ tag last? (recur arity resolver false num-locals value)))
(^code ((~ [_ (#.Int var)])))
(if (variableL.local? var)
(if (functionS.nested? arity)
(if (variableL.self? var)
(call$ (var$ 0) (|> (list.n/range +1 (n/dec arity))
(list/map (|>> variableL.local code.int (~) () (`)))))
(var$ (functionS.adjust-var arity var)))
(var$ var))
(var$ (maybe.default var (dict.get var resolver))))
(^code ("lux case" (~ inputA) (~ [_ (#.Record branchesA)])))
(synthesize-case arity num-locals (recur arity resolver false) inputA branchesA)
(^multi (^code ("lux function" [(~+ scope)] (~ bodyA)))
[(s.run scope (p.some s.int)) (#e.Success raw-env)])
(let [function-arity (if direct?
(n/inc arity)
+1)
env (list/map (function [closure]
(case (dict.get closure resolver)
(#.Some resolved)
(if (and (variableL.local? resolved)
(functionS.nested? arity)
(|> resolved variableL.local-register (n/>= arity)))
(functionS.adjust-var arity resolved)
resolved)
#.None
(if (and (variableL.local? closure)
(functionS.nested? arity))
(functionS.adjust-var arity closure)
closure)))
raw-env)
env-vars (: (List Variable)
(case raw-env
#.Nil (list)
_ (|> (list.size raw-env) n/dec (list.n/range +0) (list/map variableL.captured))))
resolver' (if (and (functionS.nested? function-arity)
direct?)
(list/fold (function [[from to] resolver']
(dict.put from to resolver'))
init-resolver
(list.zip2 env-vars env))
(list/fold (function [var resolver']
(dict.put var var resolver'))
init-resolver
env-vars))]
(case (recur function-arity resolver' true function-arity bodyA)
(^ [_ (#.Form (list [_ (#.Text "lux function")] [_ (#.Nat unmerged-arity)] env' bodyS'))])
(let [merged-arity (n/inc unmerged-arity)]
(function$ merged-arity env
(prepare-body function-arity merged-arity bodyS')))
bodyS
(function$ +1 env (prepare-body function-arity +1 bodyS))))
(^code ("lux apply" (~+ _)))
(synthesize-apply (recur arity resolver false num-locals) num-locals expressionA)
(^code ((~ [_ (#.Text name)]) (~+ args)))
(procedure$ name (list/map (recur arity resolver false num-locals) args))
_
expressionA)))
|
