| // Copyright (C) 2020 Rick Waldron. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| template: forbidden-extensions/bullet-two |
| esid: sec-forbidden-extensions |
| desc: > |
| Forbidden extension, o.caller |
| info: | |
| If an implementation extends any function object with an own property named "caller" the value of |
| that property, as observed using [[Get]] or [[GetOwnProperty]], must not be a strict function |
| object. If it is an accessor property, the function that is the value of the property's [[Get]] |
| attribute must never return a strict function when called. |
| |
| flags: [noStrict] |
| ---*/ |
| |
| //- setup |
| var CALLER_OWN_PROPERTY_DOES_NOT_EXIST = Symbol(); |
| function inner() { |
| // This property may exist, but is forbidden from having a value that is a strict function object |
| return inner.hasOwnProperty("caller") |
| ? inner.caller |
| : CALLER_OWN_PROPERTY_DOES_NOT_EXIST; |
| } |
| //- define-own-caller |
| false |
| //- define-own-caller-descriptor |
| {} |
| //- function-object |
| f |
| //- method-object |
| this.method |
| //- error |
| TypeError |
