NewFunctionEnvironment

NewFunctionEnvironment ( F, newTarget ):

1. Assert: Type(newTarget) is Undefined or Object.
2. Let envRec be a new function Environment Record containing no bindings.
3. Set envRec.[[FunctionObject]] to F.
4. If F.[[ThisMode]] is lexical, set envRec.[[ThisBindingStatus]] to lexical.
5. Else, set envRec.[[ThisBindingStatus]] to uninitialized.
6. Set envRec.[[HomeObject]] to F.[[HomeObject]].
7. Set envRec.[[NewTarget]] to newTarget.
8. Return a new Lexical Environment who's EnvironmentRecord is envRec and outer lexical environment is F.[[Environment]].