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carbon-lang/toolchain/check/testdata/interop/cpp
Richard Smith 26e23eac10 Support import of typedefs. (#5787)
Unify code paths for importing classes by name and importing them
indirectly when their type is referenced. Switch to using the general
type import machinery to import all type declarations, which allows
typedef declarations naming importable types to be used too.

Fix up handling of error cases to consistently only produce an Error
InstId after actually producing an error message, so that we can produce
exactly one diagnostic in failure cases.

Remove TODO error for unions that previously was only produced when
importing them indirectly, not when importing them by name. Import of
unions is exactly as complete / incomplete as import of other class
types, so treating them differently doesn't seem necessary.
2025-07-10 20:46:46 +00:00
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