Help: Separate C++ compile feature by standard
Additionally, mention that no fine-grained features are available for C++ 17 and beyond.
I basically looked at https://gcc.gnu.org/projects/cxx-status.html and sorted each feature accordingly. Previously, it was very tedious to figure out which fine-grained features belonged to each standard revision.
Additionally, the new additional paragraph at the top is shamelessly borrowed from @craig.scott's (fantastic!) book "Professional CMake: A Practical Guide, 7th edition" (chapter 16, "Language Requirements", last paragraph in page 168). Let me know if this is not OK.
Edited by Francisco Pombal