CI Ubuntu

Use `import std;` guarded by macro #1128

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
build (clang++-13)	2m 47s
build (clang++-14)	2m 43s
build (clang++-15)	2m 38s
build (g++-10)	2m 51s
build (g++-11)	2m 55s
build (g++-12)	2m 56s
	16m 50s