| // This file was procedurally generated from the following sources: |
| // - src/function-forms/dflt-params-ref-prior.case |
| // - src/function-forms/default/async-gen-func-decl.template |
| /*--- |
| description: Referencing a parameter that occurs earlier in the ParameterList (async generator function declaration) |
| esid: sec-asyncgenerator-definitions-instantiatefunctionobject |
| features: [default-parameters, async-iteration] |
| flags: [generated, async] |
| info: | |
| AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier |
| ( FormalParameters ) { AsyncGeneratorBody } |
| |
| [...] |
| 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 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; |
| // Stores a reference `ref` for case evaluation |
| async function* ref(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; |
| } |
| |
| ref(3).next().then(() => { |
| assert.sameValue(callCount, 1, 'generator function invoked exactly once'); |
| }).then($DONE, $DONE); |