feat: Portion for a slice #255

Job	Run time
cppcheck	1m 48s
pre-commit	41s
macos-mamba	14m 22s
linux-mamba (gcc-9, gcc, gcc-9 g++-9, gcc-9, g++-9)	18m 14s
linux-mamba (gcc-10, gcc, gcc-10 g++-10, gcc-10, g++-10)	23m 35s
linux-mamba (gcc-11, gcc, gcc-11 g++-11, gcc-11, g++-11)	18m 41s
linux-mamba (gcc-12, gcc, gcc-12 g++-12, gcc-12, g++-12)	20m 13s
linux-mamba (clang-11, clang, clang-11, clang-11, clang++-11)	20m 56s
linux-mamba (clang-12, clang, clang-12, clang-12, clang++-12)	24m 24s
linux-mamba (clang-13, clang, clang-13, clang-13, clang++-13)	19m 29s
linux-mamba (clang-14, clang, clang-14, clang-14, clang++-14)	30m 22s
	3h 12m 45s

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