Parse optional chaining and nullish coalescing #884
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This is still missing the compiler utility to make it actually compile, mostly shortcutting. Leaving it open but converting to a draft as part of 2020 vacuum, so we can cannibalize it when the time comes. |
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This PR adds support for nullish coalescing and optional chaining to the parser. Not implemented in the compiler yet because it can't yet short-circuit.