| // This file was procedurally generated from the following sources: |
| // - src/function-forms/dflt-params-ref-prior.case |
| // - src/function-forms/default/async-gen-meth.template |
| /*--- |
| description: Referencing a parameter that occurs earlier in the ParameterList (async generator method) |
| esid: sec-asyncgenerator-definitions-propertydefinitionevaluation |
| features: [default-parameters, async-iteration] |
| flags: [generated, async] |
| info: | |
| 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 |
| |
| 1. Let status be the result of performing IteratorBindingInitialization for |
| FormalsList using iteratorRecord and environment as the arguments. |
| 2. ReturnIfAbrupt(status). |
| 3. Return the result of performing IteratorBindingInitialization for |
| FormalParameter using iteratorRecord and environment as the arguments. |
| |
| ---*/ |
| var x = 0; |
| |
| var callCount = 0; |
| var obj = { |
| async *method(x, y = x, z = y) { |
| assert.sameValue(x, 3, 'first argument value'); |
| assert.sameValue(y, 3, 'second argument value'); |
| assert.sameValue(z, 3, 'third argument value'); |
| callCount = callCount + 1; |
| } |
| }; |
| |
| // Stores a reference `ref` for case evaluation |
| var ref = obj.method; |
| |
| ref(3).next().then(() => { |
| assert.sameValue(callCount, 1, 'generator method invoked exactly once'); |
| }).then($DONE, $DONE); |