consider allowing exhaustive switch statement · Issue #6155 · microsoft/TypeScript (original) (raw)

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Description

type foo = 'hey' | 'nay'; let value : foo = 'hey'; switch (value) { case 'hey': doThis(); break; case 'nay': doThat(); break; default: void; // <-- syntax TBD that indicates: 1. no other than known options are allowed 2. all known options must be considered }

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