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For the atomic specializations for shared_ptr and weak_ptr we can reuse the existing SharedPointerPrinter, with a small tweak. libstdc++-v3/ChangeLog: * python/libstdcxx/v6/printers.py (SharedPointerPrinter): Add support for atomic<shared_ptr<T>> and atomic<weak_ptr<T>>. (StdAtomicPrinter): New printer. (build_libstdcxx_dictionary): Register new printer. * testsuite/libstdc++-prettyprinters/cxx11.cc: Test std::atomic. * testsuite/libstdc++-prettyprinters/cxx20.cc: Test atomic smart pointers.