https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120160
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jiang An from comment #1) > `import std;` in every header looks too heavy to me. IMO it's undesired to > import std::cin and its friends from <vector>. If you're thinking about the global static initialization done for std::cout etc. that's no longer done in <iostream>, at least for most targets. It's done once in libstdc++.so and so there's no cost to including <iostream>.
