blob: c0ced37c2cfd31ec4d222f43b38754702511d3a0 (
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
|
(.module:
[library
[lux #*
[control
["." try (#+ Try)]
["." exception (#+ exception:)]]
[data
["." product]
["." text
["%" format (#+ format)]]
[collection
["." dictionary (#+ Dictionary)]]]]]
["." //])
(type: #export Property
Text)
(type: #export Environment
(Dictionary Property Text))
(exception: #export (unknown {property Property})
(exception.report
["Property" (%.text property)]))
(type: #export (Parser a)
(//.Parser Environment a))
(def: #export empty
Environment
(dictionary.new text.hash))
(def: #export (property name)
(-> Text (Parser Text))
(function (_ environment)
(case (dictionary.get name environment)
(#.Some value)
(exception.return [environment value])
#.None
(exception.throw ..unknown name))))
(def: #export (run parser environment)
(All [a] (-> (Parser a) Environment (Try a)))
(\ try.monad map product.right (parser environment)))
|
