Are internal data properties ever inherited?
nathan.wall at live.com
Tue Oct 8 06:36:45 PDT 2013
> Allen Wirfs-Brock wrote:
>> Nathan Wall wrote:
>> Set foo to bar.[[Baz]]
>> Does `foo` ever result in a non-undefined value if `bar` doesn't have
>> an own `[[Baz]]` property but inherits from an object that has an
>> internal `[[Baz]]` property?
> I couldn't say, as this notation is never used in the ES specification.
> Hence it means whatever the person who wrote it wants it to mean.
What do you mean?
Here are some examples where this notation is used in Rev. 19:
+ 126.96.36.199 [[Call]] (thisArgument, argumentsList)
+ Step 9.b.i.1 Set thisValue to calleeRealm.[[globalThis]].
+ 188.8.131.52 [[DefineOwnProperty]] (P, Desc)
+ Step 3.b Let oldLen be oldLenDesc.[[Value]].
+ 184.108.40.206 Runtime Semantics: LabelEvaluation
+ Step 2.f ... let V = stmt.[[value]]
+ 14.1.13 Runtime Semantics: IndexedBindingInitialisation
+ FunctionRestParameter : ... BindingIdentifier
+ Step 3 Let argumentsLength be status.[[value]].
There acutlly appears to be only one occurance of "Set ... to ...". Other occurrences say "Let ... be ...", so I should have used that terminology. Apologies.
I think I have my answer, though. Internal implies own.
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