Jon Ross-Perkins 9d234aa7e7 Start doing name lookup for references (#2472) ...

When binding a name, add it to name lookup. On NameReference nodes, use name lookup.

- Switches from "identifiers" to the more generic "strings". Not strictly necessary here, but it's the overall direction I think we've agreed upon and wanted to do it while building more support out.
- Starts doing deduplication of strings.
- On BindName, registers names with name lookup.
- Does name lookup based on the deduplicated string.
  - Per discussion with zygoloid, design is intended to be constant-time lookup regardless of the number of parent scopes.
- Adds scopes so that we can track names which will be deregistered from lookup.

2022-12-20 10:10:23 -08:00

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basic.carbon

Start doing name lookup for references (#2472)

2022-12-20 10:10:23 -08:00

order.carbon

Start doing name lookup for references (#2472)

2022-12-20 10:10:23 -08:00