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Merge pull request #809 from cppalliance/literals #670

Job	Run time
posix (clang, clang++-12, 14,17,20, ubuntu-22.04, clang-12)	7m 33s
posix (clang, clang++-13, 14,17,20, ubuntu-22.04, clang-13)	7m 30s
posix (clang, clang++-14, 14,17,20, ubuntu-22.04, clang-14)	7m 20s
posix (clang, clang++-14, 14-gnu,17-gnu,20-gnu, ubuntu-22.04, clang-14)	7m 25s
posix (clang, clang++-15, 14,17,20, ubuntu-22.04, clang-15, deb http://apt.llvm.org/jammy/ llvm-t...	7m 33s
posix (clang, clang++-16, 14,17,20, ubuntu-22.04, clang-16, deb http://apt.llvm.org/jammy/ llvm-t...	7m 38s
posix (clang, clang++-17, 14,17,20, ubuntu-22.04, clang-17, deb http://apt.llvm.org/jammy/ llvm-t...	7m 36s
posix (clang, clang++-18, 14,17,20,23, ubuntu-24.04, clang-18, deb http://apt.llvm.org/noble/ llv...	10m 34s
posix (clang, clang++-19, 14,17,20,23, ubuntu-24.04, clang-19, deb http://apt.llvm.org/noble/ llv...	9m 54s
	1h 13m 3s

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