Fix: using statement in another namespace that pointer to type alias #786

Job	Run time
ubu-24 \| g++-14 \| c++2b \| libstdc++ \| ubuntu-24.04	13s
ubu-24 \| g++-13 \| c++2b \| libstdc++ \| ubuntu-24.04	12s
ubu-20 \| g++-10 \| c++20 \| libstdc++ \| ubuntu-20.04	16s
ubu-24 \| clang++-18 \| c++20 \| libstdc++ \| ubuntu-24.04	35s
ubu-24 \| clang++-18 \| c++23 \| libc++-18-dev \| ubuntu-24.04	26s
ubu-22 \| clang++-15 \| c++20 \| libstdc++ \| ubuntu-22.04	12s
ubu-22 \| clang++-15 \| c++20 \| libc++-15-dev \| ubuntu-22.04	18s
ubu-20 \| clang++-12 \| c++20 \| libstdc++ \| ubuntu-20.04	15s
mac-14 \| clang++ \| c++2b \| default \| macos-14	16s
mac-13 \| clang++ \| c++2b \| default \| macos-13	22s
mac-13 \| clang++-15 \| c++2b \| default \| macos-13	32s
win-22 \| cl.exe \| c++latest \| default \| windows-2022	25s
win-22 \| cl.exe \| c++20 \| default \| windows-2022	24s
aggregate-results	2s
	4m 28s

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