| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-generator-function-definitions |
| es6id: 14.4 |
| description: > |
| YieldExpression cannot be used within the FormalParameters of a generator |
| function |
| info: | |
| GeneratorDeclaration[Yield, Default] : |
| function * BindingIdentifier[?Yield] ( FormalParameters[Yield] ) { GeneratorBody } |
| |
| YieldExpression cannot be used within the FormalParameters of a generator |
| function because any expressions that are part of FormalParameters are |
| evaluated before the resulting generator object is in a resumable state. |
| features: [generators, default-parameters] |
| negative: |
| phase: parse |
| type: SyntaxError |
| ---*/ |
| |
| $DONOTEVALUATE(); |
| |
| function* g(x = yield) {} |
