Annex C (informative) Compatibility [diff]

C.7 C standard library [diff.library]

C.7.3 Modifications to definitions [diff.mods.to.definitions]

C.7.3.1 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.
The tokens char16_t and char32_t are keywords in C++ ([lex.key]).
They do not appear as macro or type names defined in <cuchar>.

C.7.3.2 Type wchar_t [diff.wchar.t]

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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>.

C.7.3.3 Header <assert.h> [diff.header.assert.h]

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The token static_assert is a keyword in C++.
It does not appear as a macro name defined in <cassert>.

C.7.3.4 Header <iso646.h> [diff.header.iso646.h]

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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>.

C.7.3.5 Header <stdalign.h> [diff.header.stdalign.h]

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The token alignas is a keyword in C++ ([lex.key]), and is not introduced as a macro by <stdalign.h>.

C.7.3.6 Header <stdbool.h> [diff.header.stdbool.h]

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The tokens bool, true, and false are keywords in C++ ([lex.key]), and are not introduced as macros by <stdbool.h>.

C.7.3.7 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 null pointer constant in C++ ([support.types]).