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
|
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/arguments/args-trailing-comma-spread-operator.case
// - src/arguments/default/cls-decl-async-gen-meth-static.template
/*---
description: A trailing comma should not increase the arguments.length, using spread args (static class expression generator method)
esid: sec-runtime-semantics-bindingclassdeclarationevaluation
features: [async-iteration]
flags: [generated, async]
info: |
ClassDeclaration : class BindingIdentifier ClassTail
1. Let className be StringValue of BindingIdentifier.
2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
argument className.
[...]
14.5.14 Runtime Semantics: ClassDefinitionEvaluation
21. For each ClassElement m in order from methods
a. If IsStatic of m is false, then
b. Else,
Let status be the result of performing PropertyDefinitionEvaluation for
m with arguments F and false.
[...]
Runtime Semantics: PropertyDefinitionEvaluation
AsyncGeneratorMethod :
async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
{ AsyncGeneratorBody }
1. Let propKey be the result of evaluating PropertyName.
2. ReturnIfAbrupt(propKey).
3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
Otherwise let strict be false.
4. Let scope be the running execution context's LexicalEnvironment.
5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
AsyncGeneratorBody, scope, strict).
[...]
Trailing comma in the arguments list
Left-Hand-Side Expressions
Arguments :
( )
( ArgumentList )
( ArgumentList , )
ArgumentList :
AssignmentExpression
... AssignmentExpression
ArgumentList , AssignmentExpression
ArgumentList , ... AssignmentExpression
---*/
var arr = [2, 3];
var callCount = 0;
class C {
static async *method() {
assert.sameValue(arguments.length, 4);
assert.sameValue(arguments[0], 42);
assert.sameValue(arguments[1], 1);
assert.sameValue(arguments[2], 2);
assert.sameValue(arguments[3], 3);
callCount = callCount + 1;
}
}
// Stores a reference `ref` for case evaluation
var ref = C.method;
ref(42, ...[1], ...arr,).next().then(() => {
assert.sameValue(callCount, 1, 'method invoked exactly once');
}).then($DONE, $DONE);
|
