c加加20is the next evolution in modern c加加programming which is already partially supported by the latest version of gcc clang and Visual c加加.The move to c加加20is at least as big a step as the move to c加加11.c加加20contains a significant number of new language features and libraries that again will change the way wee program in c加加.This applies to both application programmers and programmers who provide foundation libraries.