| // This file was procedurally generated from the following sources: |
| // - src/function-forms/dflt-params-arg-val-not-undefined.case |
| // - src/function-forms/default/cls-expr-async-gen-meth.template |
| /*--- |
| description: Use of initializer when argument value is not `undefined` (class expression async generator method) |
| esid: sec-class-definitions-runtime-semantics-evaluation |
| features: [default-parameters, async-iteration] |
| flags: [generated, async] |
| info: | |
| ClassExpression : class BindingIdentifieropt ClassTail |
| |
| 1. If BindingIdentifieropt is not present, let className be undefined. |
| 2. Else, let className be StringValue of BindingIdentifier. |
| 3. 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 |
| i. Let status be the result of performing |
| PropertyDefinitionEvaluation for m with arguments proto 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). |
| [...] |
| |
| |
| 14.1.19 Runtime Semantics: IteratorBindingInitialization |
| |
| FormalsList : FormalsList , FormalParameter |
| |
| [...] |
| 23. Let iteratorRecord be Record {[[Iterator]]: |
| CreateListIterator(argumentsList), [[Done]]: false}. |
| 24. If hasDuplicates is true, then |
| [...] |
| 25. Else, |
| a. Perform ? IteratorBindingInitialization for formals with |
| iteratorRecord and env as arguments. |
| [...] |
| |
| ---*/ |
| var obj = {}; |
| var falseCount = 0; |
| var stringCount = 0; |
| var nanCount = 0; |
| var zeroCount = 0; |
| var nullCount = 0; |
| var objCount = 0; |
| |
| var callCount = 0; |
| var C = class { |
| async *method(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) { |
| assert.sameValue(aFalse, false); |
| assert.sameValue(aString, ''); |
| assert.sameValue(aNaN, NaN); |
| assert.sameValue(a0, 0); |
| assert.sameValue(aNull, null); |
| assert.sameValue(aObj, obj); |
| callCount = callCount + 1; |
| } |
| } |
| |
| // Stores a reference `ref` for case evaluation |
| var ref = C.prototype.method; |
| |
| ref(false, '', NaN, 0, null, obj).next().then(() => { |
| assert.sameValue(callCount, 1, 'method invoked exactly once'); |
| }).then($DONE, $DONE); |
| |
| |
| assert.sameValue(falseCount, 0, 'initializer not evaluated: false'); |
| assert.sameValue(stringCount, 0, 'initializer not evaluated: string'); |
| assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN'); |
| assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0'); |
| assert.sameValue(nullCount, 0, 'initializer not evaluated: null'); |
| assert.sameValue(objCount, 0, 'initializer not evaluated: object'); |