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f820fd2bc0
They are never both `None` or both `Some`, so it makes more sense to use an enum so that we "make impossible states impossible".
This directory contains the source code of the rust project, including:
- The test suite
- The bootstrapping build system
- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.