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David Blaikie
9e68ee0806
Fixes #7731, at least under `--share-cpp-ast` which is expected to be the future direction. When --share-cpp-ast is enabled and any compilation unit has C++ imports, include all compilation units in the shared CppDomain inputs and assign the domain to every unit. In ImportCpp, when a unit has no direct C++ imports but is covered by a shared CppDomain, initialize its C++ AST context and import namespace. This ensures units without direct C++ imports have access to the C++ AST and code generator when instantiating generics or referencing declarations from units that do. Assisted-by: Antigravity with Gemini