Andreas Kling 0d9be0feda LibJS: Move arguments [[ParameterMap]] to Shape ...

Mapped and unmapped arguments objects already use dedicated premade
shapes. Track their [[ParameterMap]] internal slot there instead of
setting an Object flag after construction.

This keeps the information on the shared shape, preserves it through
shape transitions, and still lets Object.prototype.toString()
recognize arguments objects without per-instance bookkeeping.

2026-04-15 15:57:48 +02:00

7.2 KiB

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