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So it looks like all these: http://www.cplusplus.com/reference/clibrary/ciso646/ are keywords in c++.
My question is. Is this a part of the c++ standard?
Can I rely on this to be supported by major compilers? I know gcc does support these keywords.
Finally, perhaps this is more a preference or style question, but are there any advantages to using the keywords over the standard operators (!, !=, && … etc)?
Yes.
Yes. But MSVC doesn’t support this by default, you need to pass it the option
/permissive-(or, though this is buggy and outdated,/Za), which disables Microsoft language extensions. It seems a good idea to enable this option for almost all C++ projects anyway, it’s just a shame it’s off by default.In general, no. But in the case of
and,or,not, many (though probably not most) people find it more readable. Personally I recommend using them.If you absolutely want the code to compile on MSVC without the
/permissive-flag,#include <ciso646>(which is a standard header that’s empty on complying C++ implementations, but adds macros for the operators on MSVC).