project reader: try to simplify code #766

Job	Run time
ubuntu-22.04 clang++14 -std=c++98 Python 3.13 Epic 0	2m 23s
ubuntu-22.04 clang++13 -std=c++98 Python 3.13 Epic 0	2m 29s
ubuntu-22.04 clang++15 -std=c++98 Python 3.13 Epic 1	2m 34s
ubuntu-22.04 clang++15 -std=c++98 Python 3.13 Epic 0	2m 27s
ubuntu-24.04 clang++16 -std=c++98 Python 3.9 Epic 0	2m 39s
ubuntu-24.04 clang++16 -std=c++11 Python 3.13 Epic 1	3m 16s
ubuntu-24.04 clang++16 -std=c++98 Python 3.10 Epic 0	2m 46s
ubuntu-24.04 clang++16 -std=c++17 Python 3.13 Epic 0	4m 3s
ubuntu-24.04 clang++16 -std=c++98 Python 3.13 Epic 1	2m 13s
ubuntu-24.04 clang++16 -std=c++11 Python 3.13 Epic 0	3m 11s
ubuntu-24.04 clang++16 -std=c++98 Python 3.13 Epic 0	2m 13s
macos-15 clang++ Python 3.13 Epic 0	3m 29s
ubuntu-24.04 clang++16 -std=c++98 Python 3.11 Epic 0	2m 20s
ubuntu-24.04 clang++16 -std=c++14 Python 3.13 Epic 0	3m 33s
ubuntu-24.04-arm clang++16 -std=c++11 Python 3.13 Epic 1	4m 53s
ubuntu-24.04 clang++16 -std=c++98 Python 3.12 Epic 0	2m 13s
ubuntu-22.04-arm clang++15 -std=c++17 Python 3.13 Epic 0	6m 36s
ubuntu-24.04-arm clang++16 -std=c++17 Python 3.13 Epic 0	6m 5s
macos-13 clang++ Python 3.13 Epic 0	7m 38s
	1h 7m 1s

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