I've been living on the edge using only #pragma once for several years and haven't regretted it. According to this support table, it's pretty widely supported t

I've been living on the edge using only #pragma once for several years and haven't regretted it. According to this support table, it's pretty widely supported these days: https://en.wikipedia.org/wiki/Pragma_once#Portability https://en.wikipedia.org/wiki/Pragma_once#Portability