ff7e057dca
11691: feat: Suggest union literals, suggest union fields within an empty union literal r=Veykril a=m0rg-dev
Adds a `Union {…}` completion in contexts where a union is expected, expanding to a choice of available fields (if snippets are supported):
Also, adds support for listing possible fields in an empty union literal.
Closes #11568.
Co-authored-by: Morgan Thomas <corp@m0rg.dev>
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