Built-in shapes for prototypes and constructors: composable storage, accessors, aliases#2580

Merged

lahma merged 11 commits into

sebastienros:mainfrom

lahma:builtin-object-shapes

Jul 5, 2026

Commits on Jul 5, 2026

Intl/Temporal namespace constructor refs via [JsIntrinsicReference]

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Composable built-in-shape storage: dispatch from ObjectInstance via IBuiltinShaped

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Shape function-only prototypes: dual-mode generator + member-read fast-path integration

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Shape 18 more function-only prototypes; generator handles zero-function shaped hosts

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Accessor support in the shape path; shape accessor-bearing prototypes

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Shape Object, Temporal and Intl accessor prototypes

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Shape constructors (Function-derived): Object, Array, Map, Set, Symbol, Promise, ArrayBuffer

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Shape 25 more constructors (Date, Error, BigInt, String, Proxy, Iterator, Intl, Temporal)

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Shape iterator and instance-typed prototypes (Array, Number, Boolean, Error)

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Generator alias feature ([JsAlias]); shape Set, String and Date prototypes

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Shape RegExpPrototype: exec as a per-realm instance slot

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