Don't require named return values be initialized before (other) unini… #899

Job	Run time
ubu-24 \| g++-13 \| c++2b \| libstdc++ \| ubuntu-24.04	6m 53s
ubu-24 \| g++-14 \| c++2b \| libstdc++ \| ubuntu-24.04	6m 51s
ubu-24 \| clang++-19 \| c++20 \| libstdc++ \| ubuntu-24.04	8m 39s
mac-14 \| clang++ \| c++2b \| default \| macos-14	3m 6s
ubu-24 \| clang++-19 \| c++23 \| libc++-18-dev \| ubuntu-24.04	8m 15s
mac-13 \| clang++-15 \| c++2b \| default \| macos-13	9m 17s
mac-13 \| clang++ \| c++2b \| default \| macos-13	5m 43s
ubu-22 \| clang++-15 \| c++20 \| libc++-15-dev \| ubuntu-22.04	5m 57s
ubu-22 \| clang++-15 \| c++20 \| libstdc++ \| ubuntu-22.04	5m 45s
win-22 \| cl.exe \| c++latest \| default \| windows-2022	28s
win-22 \| cl.exe \| c++20 \| default \| windows-2022	1m 23s
aggregate-results	4s
	1h 2m 21s

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