Tom Van Cutsem wrote:
Another potential consistency issue is between [[HasOwnProperty]]
and [[GetOwnProperty]]. That could be eliminated by combining
them into one operation:
[[GetOwnPropety]](name, descriptorNeeded) -> descriptor | boolean
| undefined
If descriptorNeeded is true it acts as the current
[[GetOwnProperty]]. If descriptorNeeded is false it acts as the
current [[HasOwnProperty]].
At the handler-level it makes it impossible to override
"hasOwn"without also overriding "getOwnPropertyDescriptor"
I understand the goals, but I'm not a big fan of fusing traps like
this. It trades complexity on one level (inconsistencies between
traps) for complexity on another level (if-tests in fused trap bodies
to determine what type of value to return).
Agreed. That kind of return value overloading has a smell.
/be
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