On Feb 11, 2014, at 5:36 PM, Michael Dyck wrote: > > One thing I still don't understand: why does GeneratorExpression invoke > BindingIdentifier with Yield but GeneratorDeclaration invokes it without? >
Yield doesn't make any sense as the bound name of a GeneratorExpression because that binding is only visible within the scope of the GeneratorExpression but "yield" can not be used as an identifier within that scope. (I suppose a function nested within the generator function could have a up-level reference to a GeneratorExpression named 'yield' , bu that is jsut going to be confusing...) The name of a generator function is bound in the surrounding scope, which may be a scope where "yield" is a valid identifier. GeneratorDeclaration looks like it needs to have [Yield] parameter telling it whether or not 'yield' is allowed in the surrounding scope and its reference to BindingIdentifier needs a [?Yield] . FunctionDeclaration/ClassDeclaration need to be handled similarly. Allen _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
