blob: 576fa8cc937b531860a9d196979ef0086c5839e0 (
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
|
(.module:
lux
(lux (control [monad #+ do]
["ex" exception #+ exception:])
(data [number]
[text]
text/format
(coll [list "list/" Functor<List> Fold<List>]
[set #+ Set]))
[macro #+ "meta/" Monad<Meta>]
(macro [code]))
(luxc [lang]
(lang [".L" variable #+ Register Variable]
["ls" synthesis #+ Synthesis Path]
(host ["_" common-lisp #+ Expression Handler SVar @@])))
[//]
(// [".T" runtime]
[".T" primitive]
[".T" reference]))
(def: #export (translate-let translate register valueS bodyS)
(-> (-> Synthesis (Meta Expression)) Register Synthesis Synthesis
(Meta Expression))
(do macro.Monad<Meta>
[valueO (translate valueS)
bodyO (translate bodyS)
#let [$register (referenceT.variable register)]]
(wrap (_.let (list [$register valueO])
bodyO))))
(def: #export (translate-record-get translate valueS pathP)
(-> (-> Synthesis (Meta Expression)) Synthesis (List [Nat Bool])
(Meta Expression))
(do macro.Monad<Meta>
[valueO (translate valueS)]
(wrap (list/fold (function (_ [idx tail?] source)
(let [method (if tail?
runtimeT.product//right
runtimeT.product//left)]
(method source (_.int (:! Int idx)))))
valueO
pathP))))
(def: #export (translate-if testO thenO elseO)
(-> Expression Expression Expression Expression)
(_.if testO thenO elseO))
(def: $savepoint (_.var "lux_pm_cursor_savepoint"))
(def: $cursor (_.var "lux_pm_cursor"))
(def: top _.length)
(def: (push! value var)
(-> Expression SVar Expression)
(_.setq! var (_.cons value (@@ var))))
(def: (pop! var)
(-> SVar Expression)
(_.setq! var (@@ var)))
(def: (push-cursor! value)
(-> Expression Expression)
(push! value $cursor))
(def: save-cursor!
Expression
(push! (@@ $cursor) $savepoint))
(def: restore-cursor!
Expression
(_.setq! $cursor (_.car (@@ $savepoint))))
(def: cursor-top
Expression
(_.car (@@ $cursor)))
(def: pop-cursor!
Expression
(pop! $cursor))
(def: pm-error (_.string "PM-ERROR"))
(def: fail-pm! (_.error pm-error))
(def: $temp (_.var "lux_pm_temp"))
(exception: #export (Unrecognized-Path {message Text})
message)
(def: $alt_error (_.var "alt_error"))
(def: (pm-catch handler)
(-> Expression Handler)
[(_.bool true) $alt_error
(_.progn
(list
(_.setq! $alt_error (_.format/3 _.nil (_.string "~A") (@@ $alt_error)))
(_.if (|> (@@ $alt_error) (_.equal pm-error))
handler
(_.error (@@ $alt_error)))))])
(def: (translate-pattern-matching' translate pathP)
(-> (-> Synthesis (Meta Expression)) Path (Meta Expression))
(case pathP
(^code ("lux case exec" (~ bodyS)))
(do macro.Monad<Meta>
[bodyO (translate bodyS)]
(wrap bodyO))
(^code ("lux case pop"))
(meta/wrap pop-cursor!)
(^code ("lux case bind" (~ [_ (#.Nat register)])))
(meta/wrap (_.setq! (referenceT.variable register) cursor-top))
(^template [<tag> <format> <=>]
[_ (<tag> value)]
(meta/wrap (_.when (|> value <format> (<=> cursor-top) _.not)
fail-pm!)))
([#.Bool _.bool _.equal]
[#.Nat (<| _.int (:! Int)) _.=]
[#.Int _.int _.=]
[#.Deg (<| _.int (:! Int)) _.=]
[#.Frac _.float _.=]
[#.Text _.string _.equal])
(^template [<pm> <getter>]
(^code (<pm> (~ [_ (#.Nat idx)])))
(meta/wrap (push-cursor! (<getter> cursor-top (_.int (:! Int idx))))))
(["lux case tuple left" runtimeT.product//left]
["lux case tuple right" runtimeT.product//right])
(^template [<pm> <flag>]
(^code (<pm> (~ [_ (#.Nat idx)])))
(meta/wrap (_.progn (list (_.setq! $temp (runtimeT.sum//get cursor-top (_.int (:! Int idx)) <flag>))
(_.if (_.null (@@ $temp))
fail-pm!
(push-cursor! (@@ $temp)))))))
(["lux case variant left" _.nil]
["lux case variant right" (_.string "")])
(^code ("lux case seq" (~ leftP) (~ rightP)))
(do macro.Monad<Meta>
[leftO (translate-pattern-matching' translate leftP)
rightO (translate-pattern-matching' translate rightP)]
(wrap (_.progn (list leftO
rightO))))
(^code ("lux case alt" (~ leftP) (~ rightP)))
(do macro.Monad<Meta>
[leftO (translate-pattern-matching' translate leftP)
rightO (translate-pattern-matching' translate rightP)]
(wrap (runtimeT.with-vars [error]
(_.handler-case
(list (pm-catch (_.progn (list restore-cursor!
rightO))))
(_.progn (list save-cursor!
leftO))))))
_
(lang.throw Unrecognized-Path (%code pathP))
))
(def: (translate-pattern-matching translate pathP)
(-> (-> Synthesis (Meta Expression)) Path (Meta Expression))
(do macro.Monad<Meta>
[pattern-matching! (translate-pattern-matching' translate pathP)]
(wrap (_.handler-case
(list (pm-catch (_.error (_.string "Invalid expression for pattern-matching."))))
pattern-matching!))))
(def: (initialize-pattern-matching! stack-init body)
(-> Expression Expression Expression)
(_.let (list [$cursor (_.list (list stack-init))]
[$savepoint (_.list (list))]
[$temp _.nil])
body))
(def: #export (translate-case translate valueS pathP)
(-> (-> Synthesis (Meta Expression)) Synthesis Path (Meta Expression))
(do macro.Monad<Meta>
[valueO (translate valueS)
pattern-matching! (translate-pattern-matching translate pathP)]
(wrap (<| (initialize-pattern-matching! valueO)
pattern-matching!))))
|
