aboutsummaryrefslogtreecommitdiff
path: root/stdlib/source/library/lux/tool/compiler/meta/archive/document.lux
blob: ddb71ac9393228d48b6be010431f953aacb0bebb (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
(.module:
  [library
   [lux {"-" [Module]}
    [abstract
     [monad {"+" [do]}]]
    [control
     ["[0]" try {"+" [Try]}]
     ["[0]" exception {"+" [exception:]}]
     ["<>" parser
      [binary {"+" [Parser]}]]]
    [data
     [collection
      ["[0]" dictionary {"+" [Dictionary]}]]
     [format
      ["[0]" binary {"+" [Writer]}]]]
    [type {"+" [:sharing]}
     abstract]]]
  [//
   ["[0]" signature {"+" [Signature]}]
   ["[0]" key {"+" [Key]}]
   [descriptor {"+" [Module]}]])

(exception: .public (invalid_signature {expected Signature} {actual Signature})
  (exception.report
   ["Expected" (signature.description expected)]
   ["Actual" (signature.description actual)]))

(abstract: .public (Document d)
  (Record
   [#signature Signature
    #content d])

  [(def: .public (read key document)
     (All (_ d) (-> (Key d) (Document Any) (Try d)))
     (let [[document//signature document//content] (:representation document)]
       (if (\ signature.equivalence =
              (key.signature key)
              document//signature)
         (#try.Success (:sharing [e]
                                 (Key e)
                                 key
                                 
                                 e
                                 (:expected document//content)))
         (exception.except ..invalid_signature [(key.signature key)
                                                document//signature]))))

   (def: .public (write key content)
     (All (_ d) (-> (Key d) d (Document d)))
     (:abstraction [#signature (key.signature key)
                    #content content]))

   (def: .public (check key document)
     (All (_ d) (-> (Key d) (Document Any) (Try (Document d))))
     (do try.monad
       [_ (..read key document)]
       (in (:expected document))))

   (def: .public signature
     (-> (Document Any) Signature)
     (|>> :representation (value@ #signature)))

   (def: .public (writer content)
     (All (_ d) (-> (Writer d) (Writer (Document d))))
     (let [writer (binary.and signature.writer
                              content)]
       (|>> :representation writer)))

   (def: .public parser
     (All (_ d) (-> (Parser d) (Parser (Document d))))
     (|>> (<>.and signature.parser)
          (\ <>.monad each (|>> :abstraction))))]
  )