build

C++20 compatible polyfill for `<expected>` #1049

Job	Run time
linux (Debug, gcc, 12, cxx20)	28s
linux (Debug, clang, 16, cxx20)	22s
linux (Debug, clang, 17, cxx20)	29s
linux (Debug, gcc, 13, cxx20 cxx23)	1m 0s
macos (Debug, appleclang, 15, cxx20 cxx23)	2m 8s
linux (Debug, gcc, 14, cxx20 cxx23)	2m 4s
macos (Debug, clang, 18, 15, cxx20 cxx23)	2m 50s
linux (Debug, clang, 18, cxx20 cxx23)	1m 15s
macos (Release, appleclang, 15, cxx20 cxx23)	2m 10s
linux (Debug, clang, 19, cxx20 cxx23)	1m 15s
macos (Release, clang, 18, 15, cxx20 cxx23)	3m 6s
linux (Release, gcc, 12, cxx20)	27s
linux (Release, clang, 16, cxx20)	24s
nixos (gcc)	1m 48s
linux (Release, clang, 17, cxx20)	25s
linux (Release, gcc, 13, cxx20 cxx23)	1m 12s
nixos (clang)	2m 39s
linux (Release, gcc, 14, cxx20 cxx23)	1m 44s
linux (Release, clang, 18, cxx20 cxx23)	1m 20s
windows (Debug, Visual Studio 17 2022, 2025, cxx20)	1m 15s
linux (Release, clang, 19, cxx20 cxx23)	1m 18s
windows (Release, Visual Studio 17 2022, 2025, cxx20)	1m 17s
	30m 56s

Provide feedback