blob: 8fdeb4911c87c16fa4811885eb199710eb5969a4 (
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
|
(.module:
[lux (#- function i64)
[abstract
[monad (#+ do)]]
[control
["." try (#+ Try)]
["." exception (#+ exception:)]]
[data
["." bit]
["." name]
[number
["." i64]
["n" nat]
["." frac]]
["." text
["%" format (#+ format)]]]
[tool
[compiler
[arity (#+ Arity)]
[analysis (#+ Variant Tuple Environment)]
["/" synthesis (#+ Synthesis Abstraction)]]]]
["." //])
(def: Input Type (type (List Synthesis)))
(exception: #export (cannot-parse {input ..Input})
(exception.report
["Input" (exception.enumerate /.%synthesis input)]))
(exception: #export (unconsumed-input {input ..Input})
(exception.report
["Input" (exception.enumerate /.%synthesis input)]))
(exception: #export (wrong-arity {expected Arity} {actual Arity})
(exception.report
["Expected" (%.nat expected)]
["Actual" (%.nat actual)]))
(exception: #export empty-input)
(type: #export Parser
(//.Parser ..Input))
(def: #export (run input parser)
(All [a] (-> ..Input (Parser a) (Try a)))
(case (parser input)
(#try.Failure error)
(#try.Failure error)
(#try.Success [#.Nil value])
(#try.Success value)
(#try.Success [unconsumed _])
(exception.throw ..unconsumed-input unconsumed)))
(def: #export any
(Parser Synthesis)
(.function (_ input)
(case input
#.Nil
(exception.throw ..empty-input [])
(#.Cons [head tail])
(#try.Success [tail head]))))
(template [<query> <assertion> <tag> <type> <eq>]
[(def: #export <query>
(Parser <type>)
(.function (_ input)
(case input
(^ (list& (<tag> x) input'))
(#try.Success [input' x])
_
(exception.throw ..cannot-parse input))))
(def: #export (<assertion> expected)
(-> <type> (Parser Any))
(.function (_ input)
(case input
(^ (list& (<tag> actual) input'))
(if (:: <eq> = expected actual)
(#try.Success [input' []])
(exception.throw ..cannot-parse input))
_
(exception.throw ..cannot-parse input))))]
[bit bit! /.bit Bit bit.equivalence]
[i64 i64! /.i64 (I64 Any) i64.equivalence]
[f64 f64! /.f64 Frac frac.equivalence]
[text text! /.text Text text.equivalence]
[local local! /.variable/local Nat n.equivalence]
[foreign foreign! /.variable/foreign Nat n.equivalence]
[constant constant! /.constant Name name.equivalence]
)
(def: #export (tuple parser)
(All [a] (-> (Parser a) (Parser a)))
(.function (_ input)
(case input
(^ (list& (/.tuple head) tail))
(do try.monad
[output (..run head parser)]
(#try.Success [tail output]))
_
(exception.throw ..cannot-parse input))))
(def: #export (function expected parser)
(All [a] (-> Arity (Parser a) (Parser [Environment a])))
(.function (_ input)
(case input
(^ (list& (/.function/abstraction [environment actual body]) tail))
(if (n.= expected actual)
(do try.monad
[output (..run (list body) parser)]
(#try.Success [tail [environment output]]))
(exception.throw ..wrong-arity [expected actual]))
_
(exception.throw ..cannot-parse input))))
|
