Narrow object types when assigned value is not an object literal or variable reference #12798
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Resolves #12590
The TypeValidator's object type narrowing logic currently only runs when the assigned value is or can be traced directly back to an object literal (i.e., an
ObjectSyntax
node). This PR updates the narrowing logic for both object and discriminated objects to be type- rather than syntax-driven, which allows narrowing to be performed on the return value of expressions, property/array accesses, and references to resources, module outputs, and imported variables.Microsoft Reviewers: Open in CodeFlow