Annex C (informative) Compatibility [diff]

C.3 C standard library [diff.library]

C.3.2 Modifications to definitions [diff.mods.to.definitions]

C.3.2.1 Types char16_t and char32_t [diff.char16]

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

C.3.2.2 Type wchar_t [diff.wchar.t]

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wchar_t is a keyword in this International Standard ([lex.key]). It does not appear as a type name defined in any of <cstddef>, <cstdlib>, or <cwchar> ([c.strings]).

C.3.2.3 Header <iso646.h> [diff.header.iso646.h]

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The tokens and, and_eq, bitand, bitor, compl, not_eq, not, or, or_eq, xor, and xor_eq are keywords in this International Standard ([lex.key]). They do not appear as macro names defined in <ciso646>.

C.3.2.4 Macro NULL [diff.null]

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