Annex C (informative) Compatibility [diff]

The types char8_t, char16_t, and char32_t are distinct types rather than typedefs to existing integral types.

The tokens char8_t, char16_t, and char32_t are keywords in C++ ([lex.key]).

They do not appear as macro or type names defined in <cuchar>.

The type wchar_t is a distinct type rather than a typedef to an existing integral type.

The token wchar_t is a keyword in C++ ([lex.key]).

It does not appear as a macro or type name defined in any of <cstddef>, <cstdlib>, or <cwchar>.

The tokens and, and_eq, bitand, bitor, compl, not, not_eq, or, or_eq, xor, and xor_eq are keywords in C++ ([lex.key]), and are not introduced as macros by <iso646.h>.

The macro NULL, defined in any of <clocale>, <cstddef>, <cstdio>, <cstdlib>, <cstring>, <ctime>, or <cwchar>, is an implementation-defined null pointer constant in C++ ([support.types]).