Richard Smith f31e1685fd Only export each class or namespace to C++ once. (#7042) ...

Instead of exporting a class or namespace each time a new C++ name
lookup discovers it, track that we have exported the entity on its name
scope, and if a new name lookup finds the same entity, produce the same
clang declaration.

2026-04-13 19:43:44 +00:00

..

export.carbon

Only export each class or namespace to C++ once. (#7042)

2026-04-13 19:43:44 +00:00

import.carbon

Only export each class or namespace to C++ once. (#7042)

2026-04-13 19:43:44 +00:00

roundtrip.carbon

Only export each class or namespace to C++ once. (#7042)

2026-04-13 19:43:44 +00:00