blob: ed084b44d9092dc6ee2c03e48fdd14f3c4052e2b (
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
|
(.module:
lux
(lux (control [monad #+ do]
["ex" exception #+ exception:])
(data text/format
(coll [list "list/" Fold<List>]))
[macro #+ "meta/" Monad<Meta>])
(luxc [lang]
(lang ["ls" synthesis]
(host [lua #+ Lua Expression Statement])))
[//]
(// [".T" runtime]
[".T" primitive]
[".T" reference]))
(def: (expression-block body)
(-> Statement Expression)
(lua.apply (lua.function (list)
body)
(list)))
(def: #export (translate-let translate register valueS bodyS)
(-> (-> ls.Synthesis (Meta Expression)) Nat ls.Synthesis ls.Synthesis
(Meta Expression))
(do macro.Monad<Meta>
[valueO (translate valueS)
bodyO (translate bodyS)]
(wrap (expression-block
(lua.block! (list (lua.local! (referenceT.variable register) (#.Some valueO))
(lua.return! bodyO)))))))
(def: #export (translate-record-get translate valueS path)
(-> (-> ls.Synthesis (Meta Expression)) ls.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 (lua.int (:! Int idx)))))
valueO
path))))
(def: #export (translate-if testO thenO elseO)
(-> Expression Expression Expression Expression)
(expression-block
(lua.if! testO
(lua.return! thenO)
(lua.return! elseO))))
(def: savepoint
Expression
"pm_cursor_savepoint")
(def: cursor
Expression
"pm_cursor")
(def: (push-cursor! value)
(-> Expression Expression)
(lua.apply "table.insert" (list cursor value)))
(def: save-cursor!
Statement
(lua.apply "table.insert" (list savepoint (runtimeT.array//copy cursor))))
(def: restore-cursor!
Statement
(lua.set! cursor (lua.apply "table.remove" (list savepoint))))
(def: cursor-top
Expression
(lua.nth (lua.length cursor) cursor))
(def: pop-cursor!
Statement
(lua.apply "table.remove" (list cursor)))
(def: pm-error
Expression
(lua.string "PM-ERROR"))
(exception: #export (Unrecognized-Path {message Text})
message)
(def: (translate-pattern-matching' translate path)
(-> (-> ls.Synthesis (Meta Expression)) Code (Meta Expression))
(case path
(^code ("lux case exec" (~ bodyS)))
(do macro.Monad<Meta>
[bodyO (translate bodyS)]
(wrap (lua.return! bodyO)))
(^code ("lux case pop"))
(meta/wrap pop-cursor!)
(^code ("lux case bind" (~ [_ (#.Nat register)])))
(meta/wrap (lua.local! (referenceT.variable register) (#.Some cursor-top)))
(^template [<tag> <format>]
[_ (<tag> value)]
(meta/wrap (lua.when! (lua.not (lua.= (|> value <format>) cursor-top))
(lua.return! pm-error))))
([#.Nat (<| lua.int (:! Int))]
[#.Int lua.int]
[#.Deg (<| lua.int (:! Int))]
[#.Bool lua.bool]
[#.Frac lua.float]
[#.Text lua.string])
(^template [<pm> <getter>]
(^code (<pm> (~ [_ (#.Nat idx)])))
(meta/wrap (push-cursor! (<getter> cursor-top (lua.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 (lua.block! (list (lua.set! "temp" (runtimeT.sum//get cursor-top (lua.int (:! Int idx)) <flag>))
(lua.if! (lua.= lua.nil "temp")
(lua.return! pm-error)
(push-cursor! "temp"))))))
(["lux case variant left" lua.nil]
["lux case variant right" (lua.string "")])
(^code ("lux case seq" (~ leftP) (~ rightP)))
(do macro.Monad<Meta>
[leftO (translate-pattern-matching' translate leftP)
rightO (translate-pattern-matching' translate rightP)]
(wrap (lua.block! (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 (lua.block! (list (format "local alt_success, alt_value = " (lua.apply "pcall" (list (lua.function (list)
(lua.block! (list save-cursor!
leftO))))) ";")
(lua.if! "alt_success"
(lua.return! "alt_value")
(lua.if! (lua.= pm-error "alt_value")
(lua.block! (list restore-cursor!
rightO))
(lua.error "alt_value")))))))
_
(lang.throw Unrecognized-Path (%code path))
))
(def: (translate-pattern-matching translate path)
(-> (-> ls.Synthesis (Meta Expression)) Code (Meta Expression))
(do macro.Monad<Meta>
[pattern-matching (translate-pattern-matching' translate path)]
(wrap (lua.block! (list (format "local success, value = pcall(function () " pattern-matching " end);")
(lua.if! "success"
(lua.return! "value")
(lua.if! (lua.= pm-error "value")
(lua.error (lua.string "Invalid expression for pattern-matching."))
(lua.error "value"))))))))
(def: (initialize-pattern-matching stack-init)
(-> Expression Statement)
(lua.block! (list (lua.local! "temp" #.None)
(lua.local! cursor (#.Some (lua.array (list stack-init))))
(lua.local! savepoint (#.Some (lua.array (list)))))))
(def: #export (translate-case translate valueS path)
(-> (-> ls.Synthesis (Meta Expression)) ls.Synthesis Code (Meta Expression))
(do macro.Monad<Meta>
[valueO (translate valueS)
pattern-matching (translate-pattern-matching translate path)]
(wrap (expression-block
(lua.block! (list (initialize-pattern-matching valueO)
pattern-matching))))))
|
