[diff.header.iso646.h]

The tokens and, and_eq, bitand, bitor, compl, not, not_eq, or, or_eq, xor, and xor_eq are keywords in this International Standard, and are not introduced as macros by <iso646.h> ([depr.iso646.h.syn]).

Annex C (informative) Compatibility [diff]

C.6 C standard library [diff.library]

C.6.2 Modifications to definitions [diff.mods.to.definitions]

C.6.2.4 Header <iso646.h> [diff.header.iso646.h]