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Chris Tate
5a48c8f1a2
With SCRIPTC_INFER_JS=1, shape inference writes its overlay for the program's own JavaScript files, with or without npm-static packages, and leaves package files as they are. The analysis and overlay keep a value untyped where an inferred type would be narrower than what the program holds: awaited values of for await, iterable object literals with computed keys, matchAll and other builtin results, fields an instance may lack, overridden methods and getters, class instances reached by reflection, constructor parameters stored into wider fields, and results the analysis cannot type. A computed member name no longer folds a read that runs before its binding is initialized. In every build, a JavaScript binding written with a value that may be a string, or with a union, keeps the dynamic representation.