Add member format_as for std #7468

Job	Run time
build (windows-2019, Win32, v142, 17, Debug)	1m 48s
mingw (mingw64)	3m 38s
build (windows-2019, Win32, v142, 17, Release)	2m 17s
mingw (ucrt64)	3m 57s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 37s
build (windows-2019, Win32, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	2m 0s
build (windows-2019, x64, v141, 14, Debug)	1m 43s
build (windows-2019, x64, v141, 14, Release)	3m 0s
build (windows-2019, x64, v141, 17, Debug)	1m 27s
build (windows-2019, x64, v141, 17, Release)	2m 36s
build (windows-2019, x64, v142, 17, Debug)	1m 33s
build (windows-2019, x64, v142, 17, Release)	2m 26s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Debug)	1m 12s
build (windows-2019, x64, v142, 17, -DBUILD_SHARED_LIBS=ON, Release)	2m 10s
build (windows-2019, x64, v142, 20, Debug)	1m 46s
build (windows-2019, x64, v142, 20, Release)	2m 48s
build (windows-2022, x64, v143, Debug, 20)	3m 3s
	39m 1s

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