Files
carbon-lang/toolchain/parse
Jon Ross-Perkins f0403dadab Move None to IdBase (#5030)
Use CRTP to eliminate per-type declarations of `None`. Note this adds
`None` to a few that may not need it, but eliminates a lot off
boilerplate.

Note this leaves `GenericInstIndex::None` because it has a more complex
construction.

Also fix `InstId::InitTombstone` to be `NoneIndex - 1`
2025-03-01 08:00:17 +00:00
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