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85 lines
2.7 KiB
JavaScript
85 lines
2.7 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/obj-ptrn-prop-id-init-skipped.case
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// - src/dstr-binding/default/cls-expr-async-gen-meth-static-dflt.template
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/*---
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description: Destructuring initializer is not evaluated when value is not `undefined` (static class expression async generator method (default parameter))
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esid: sec-class-definitions-runtime-semantics-evaluation
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features: [async-iteration]
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flags: [generated, async]
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info: |
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ClassExpression : class BindingIdentifieropt ClassTail
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1. If BindingIdentifieropt is not present, let className be undefined.
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2. Else, let className be StringValue of BindingIdentifier.
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3. Let value be the result of ClassDefinitionEvaluation of ClassTail
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with argument className.
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[...]
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14.5.14 Runtime Semantics: ClassDefinitionEvaluation
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21. For each ClassElement m in order from methods
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a. If IsStatic of m is false, then
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b. Else,
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Let status be the result of performing PropertyDefinitionEvaluation
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for m with arguments F and false.
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[...]
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Runtime Semantics: PropertyDefinitionEvaluation
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AsyncGeneratorMethod :
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async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
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{ AsyncGeneratorBody }
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1. Let propKey be the result of evaluating PropertyName.
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2. ReturnIfAbrupt(propKey).
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3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
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Otherwise let strict be false.
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4. Let scope be the running execution context's LexicalEnvironment.
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5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
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AsyncGeneratorBody, scope, strict).
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[...]
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13.3.3.7 Runtime Semantics: KeyedBindingInitialization
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BindingElement : BindingPattern Initializeropt
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[...]
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3. If Initializer is present and v is undefined, then
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[...]
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---*/
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var initCount = 0;
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function counter() {
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initCount += 1;
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}
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var callCount = 0;
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var C = class {
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static async *method({ s: t = counter(), u: v = counter(), w: x = counter(), y: z = counter() } = { s: null, u: 0, w: false, y: '' }) {
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assert.sameValue(t, null);
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assert.sameValue(v, 0);
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assert.sameValue(x, false);
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assert.sameValue(z, '');
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assert.sameValue(initCount, 0);
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assert.throws(ReferenceError, function() {
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s;
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});
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assert.throws(ReferenceError, function() {
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u;
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});
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assert.throws(ReferenceError, function() {
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w;
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});
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assert.throws(ReferenceError, function() {
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y;
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});
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callCount = callCount + 1;
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}
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};
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C.method().next().then(() => {
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assert.sameValue(callCount, 1, 'invoked exactly once');
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}).then($DONE, $DONE);
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