wasm-tools 1.253.0

CLI tools for interoperating with WebAssembly files
Documentation 
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

;; RUN: wast --assert default --snapshot tests/snapshots % -f cm-implements

(component
  (component
    (import "a" (implements "a:b/c") (instance))
    (import "b" (implements "a:b/c") (instance))
    (import "c" (implements "a:b/c@1.0.0") (instance))
    (import "my-label" (implements "ns:pkg/iface") (instance))
    (import "a:b/c" (instance))
    (import "a:b/c@1.0.0" (instance))

    (instance $a)

    (export "a" (implements "a:b/c") (instance $a))
    (export "b" (implements "a:b/c") (instance $a))
    (export "c" (implements "a:b/c@1.0.0") (instance $a))
    (export "my-label" (implements "ns:pkg/iface") (instance $a))
    (export "a:b/c" (instance $a))
    (export "a:b/c@1.0.0" (instance $a))
  )

  (type (instance
    (export "a" (implements "a:b/c") (instance))
  ))
  (type (component
    (import "a" (implements "a:b/c") (instance))
    (export "a" (implements "a:b/c") (instance))
  ))

  (instance $a)
  (instance
    (export "a" (implements "a:b/c") (instance $a))
  )
)

(assert_invalid
  (component (import "a" (implements "not-valid") (instance)))
  "must be an interface")
(assert_invalid
  (component (import "a" (implements "") (instance)))
  "not a valid name")

(assert_invalid
  (component
    (import "a" (implements "a:b/c") (instance))
    (import "a" (implements "a:b/c") (instance))
  )
  "conflicts with previous name")

(assert_invalid
  (component
    (import "a" (implements "a1:b/c") (instance))
    (import "a" (implements "a2:b/c") (instance))
  )
  "conflicts with previous name")

(assert_invalid
  (component
    (import "a" (implements "a:b/c") (instance))
    (import "a" (implements "a:b/c@1.0.0") (instance))
  )
  "conflicts with previous name")

(assert_invalid
  (component
    (import "a" (instance))
    (import "a" (implements "a:b/c") (instance))
  )
  "conflicts with previous name")

(assert_invalid
  (component
    (import "a" (implements "a:b/c") (func))
  )
  "only instances can have an `implements`")

(assert_invalid
  (component
    (import "a1:b/c" (implements "a2:b/c") (instance))
  )
  "name `a1:b/c` is not valid with `implements`")

;; validity checks apply to other locations of `implements`, such as
;; component/instance types and bag-of-exports.
(assert_invalid
  (component (type (component (import "a" (implements "not-valid") (instance)))))
  "must be an interface")
(assert_invalid
  (component (type (component (export "a" (implements "") (instance)))))
  "not a valid name")
(assert_invalid
  (component (type (instance (export "a" (implements "a:b/c") (func)))))
  "only instances")
(assert_invalid
  (component
    (instance)
    (instance (export "x" (implements "a") (instance 0)))
  )
  "must be an interface")

;; ---------------------------------- external-id ----------------------------

;; goes on various things
(component
  (component
    (import "a" (external-id "") (instance))
    (import "b" (external-id "") (instance))
    (import "c" (external-id "") (instance))
    (import "a:b/c" (external-id "") (instance))

    (instance $a)

    (export "a" (external-id "") (instance $a))
    (export "b" (external-id "") (instance $a))
    (export "c" (external-id "") (instance $a))
    (export "a:b/c" (external-id "") (instance $a))
  )

  (type (instance
    (export "a" (external-id "") (instance))
  ))
  (type (component
    (import "a" (external-id "") (instance))
    (export "a" (external-id "") (instance))
  ))

  (instance $a)
  (instance
    (export "a" (external-id "") (instance $a))
  )

  ;; works on all types of items, not just instances.
  (import "i1" (external-id "") (func))
  (import "i2" (external-id "") (component))
  (import "i3" (external-id "") (type (sub resource)))
  (import "i4" (external-id "") (core module))

  ;; works within instances too
  (import "i5" (instance
    (export "i1" (external-id "") (func))
    (export "i2" (external-id "") (component))
    (export "i3" (external-id "") (type (sub resource)))
    (export "i4" (external-id "") (core module))
    (export "i5" (external-id "") (instance))
  ))
)

;; totally unstructured
(component
  (component
    (import "a" (external-id "") (instance))
    (import "b" (external-id "hello, general kenobi") (instance))
    (import "c" (external-id "https://this.is.a/url") (instance))
    (import "d" (external-id "look\tma\nwhitespace\r\n") (instance))
    (import "e" (external-id "\00") (instance))
  )
)

;; must be utf-8
(assert_malformed
  (component quote "(import \"a\" (external-id \"\\ff\") (instance))")
  "malformed UTF-8 encoding")