#include "Foo.h"

int main() {
  Foo f{};
}

// command line:
/*

ln -s /Archive2/97/69e1b3dc7af21f/main.cpp Foo.h
ln -s /Archive2/33/abc01b07a06392/main.cpp Foo.cpp
g++ -std=c++20 -O2 -Wall -pedantic Foo.cpp main.cpp && ./a.out

*/

// Foo.h     @  https://coliru.stacked-crooked.com/a/9769e1b3dc7af21f
// Foo.cpp   @  https://coliru.stacked-crooked.com/a/33abc01b07a06392