Collapse unions of objects with an inferable discriminator into tagged unions #12129
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Split off from work on #9736, which requires a couple changes that are easier to consider as standalone PRs.
This PR updates the
TypeCollapser
to handle unions of objects that share a required, string-literal-typed property for which each member of the union has a unique value. (If there are multiple viable discriminators, theTypeCollapser
will try to use a property namedtype
orkind
, then fall back to the first viable discriminator name in an ordinal alphabetic sort.)Microsoft Reviewers: Open in CodeFlow