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
176
177
|
=== tests/cases/conformance/generators/generatorAssignability.ts ===
declare let _: any;
>_ : any
declare const g1: Generator<number, void, string>;
>g1 : Generator<number, void, string>
declare const g2: Generator<number, void, undefined>;
>g2 : Generator<number, void, undefined>
declare const g3: Generator<number, void, boolean>;
>g3 : Generator<number, void, boolean>
declare const g4: AsyncGenerator<number, void, string>;
>g4 : AsyncGenerator<number, void, string>
declare const g5: AsyncGenerator<number, void, undefined>;
>g5 : AsyncGenerator<number, void, undefined>
declare const g6: AsyncGenerator<number, void, boolean>;
>g6 : AsyncGenerator<number, void, boolean>
// spread iterable
[...g1]; // error
>[...g1] : number[]
>...g1 : number
>g1 : Generator<number, void, string>
[...g2]; // ok
>[...g2] : number[]
>...g2 : number
>g2 : Generator<number, void, undefined>
// binding pattern over iterable
let [x1] = g1; // error
>x1 : number
>g1 : Generator<number, void, string>
let [x2] = g2; // ok
>x2 : number
>g2 : Generator<number, void, undefined>
// binding rest pattern over iterable
let [...y1] = g1; // error
>y1 : number[]
>g1 : Generator<number, void, string>
let [...y2] = g2; // ok
>y2 : number[]
>g2 : Generator<number, void, undefined>
// assignment pattern over iterable
[_] = g1; // error
>[_] = g1 : Generator<number, void, string>
>[_] : [any]
>_ : any
>g1 : Generator<number, void, string>
[_] = g2; // ok
>[_] = g2 : Generator<number, void, undefined>
>[_] : [any]
>_ : any
>g2 : Generator<number, void, undefined>
// assignment rest pattern over iterable
[..._] = g1; // error
>[..._] = g1 : Generator<number, void, string>
>[..._] : any[]
>..._ : any
>_ : any
>g1 : Generator<number, void, string>
[..._] = g2; // ok
>[..._] = g2 : Generator<number, void, undefined>
>[..._] : any[]
>..._ : any
>_ : any
>g2 : Generator<number, void, undefined>
// for-of over iterable
for (_ of g1); // error
>_ : any
>g1 : Generator<number, void, string>
for (_ of g2); // ok
>_ : any
>g2 : Generator<number, void, undefined>
async function asyncfn() {
>asyncfn : () => Promise<void>
// for-await-of over iterable
for await (_ of g1); // error
>_ : any
>g1 : Generator<number, void, string>
for await (_ of g2); // ok
>_ : any
>g2 : Generator<number, void, undefined>
// for-await-of over asynciterable
for await (_ of g4); // error
>_ : any
>g4 : AsyncGenerator<number, void, string>
for await (_ of g5); // ok
>_ : any
>g5 : AsyncGenerator<number, void, undefined>
}
function* f1(): Generator<number, void, boolean> {
>f1 : () => Generator<number, void, boolean>
// yield* over iterable
yield* g1; // error
>yield* g1 : void
>g1 : Generator<number, void, string>
yield* g3; // ok
>yield* g3 : void
>g3 : Generator<number, void, boolean>
}
async function* f2(): AsyncGenerator<number, void, boolean> {
>f2 : () => AsyncGenerator<number, void, boolean>
// yield* over iterable
yield* g1; // error
>yield* g1 : void
>g1 : Generator<number, void, string>
yield* g3; // ok
>yield* g3 : void
>g3 : Generator<number, void, boolean>
// yield* over asynciterable
yield* g4; // error
>yield* g4 : void
>g4 : AsyncGenerator<number, void, string>
yield* g6; // ok
>yield* g6 : void
>g6 : AsyncGenerator<number, void, boolean>
}
async function f3() {
>f3 : () => Promise<void>
const syncGenerator = function*() {
>syncGenerator : () => Generator<1 | 2, void, unknown>
>function*() { yield 1; yield 2; } : () => Generator<1 | 2, void, unknown>
yield 1;
>yield 1 : any
>1 : 1
yield 2;
>yield 2 : any
>2 : 2
};
const o = {[Symbol.asyncIterator]: syncGenerator};
>o : { [Symbol.asyncIterator]: () => Generator<1 | 2, void, unknown>; }
>{[Symbol.asyncIterator]: syncGenerator} : { [Symbol.asyncIterator]: () => Generator<1 | 2, void, unknown>; }
>[Symbol.asyncIterator] : () => Generator<1 | 2, void, unknown>
>Symbol.asyncIterator : unique symbol
>Symbol : SymbolConstructor
>asyncIterator : unique symbol
>syncGenerator : () => Generator<1 | 2, void, unknown>
for await (const x of o) {
>x : 1 | 2
>o : { [Symbol.asyncIterator]: () => Generator<1 | 2, void, unknown>; }
}
}
|
