[lex.key] (original) (raw)

5 Lexical conventions [lex]

5.12 Keywords [lex.key]

keyword:
any identifier listed in Table 5
import-keyword
module-keyword
export-keyword

The identifiers shown in Table 5 are reserved for use as keywords (that is, they are unconditionally treated as keywords in phase 7) except in an attribute-token ([dcl.attr.grammar]).

[Note 1:

The register keyword is unused but is reserved for future use.

— _end note_]

Table 5 — Keywords [tab:lex.key]

🔗alignas	constinit	extern	protected	throw
🔗alignof	const_cast	false	public	true
🔗asm	continue	float	register	try
🔗auto	contract_assert	for	reinterpret_cast	typedef
🔗bool	co_await	friend	requires	typeid
🔗break	co_return	goto	return	typename
🔗case	co_yield	if	short	union
🔗catch	decltype	inline	signed	unsigned
🔗char	default	int	sizeof	using
🔗char8_t	delete	long	static	virtual
🔗char16_t	do	mutable	static_assert	void
🔗char32_t	double	namespace	static_cast	volatile
🔗class	dynamic_cast	new	struct	wchar_t
🔗concept	else	noexcept	switch	while
🔗const	enum	nullptr	template
🔗consteval	explicit	operator	this
🔗constexpr	export	private	thread_local

Furthermore, the alternative representations shown in Table 6 for certain operators and punctuators ([lex.digraph]) are reserved and shall not be used otherwise.

Table 6 — Alternative representations [tab:lex.key.digraph]

🔗and	and_eq	bitand	bitor	compl	not
🔗not_eq	or	or_eq	xor	xor_eq