keywords (* added since c++03, ** added since 2008.04)
*	alignof
	asm
	auto
**	axiom
	bool
	break
	case
	catch
	char
*	char16_t
*	char32_t
	class
**	concept
**	concept_map
	const
	const_cast
*	constexpr
	continue
*	decltype
	default
	delete
	do
	double
	dynamic_cast
	else
	enum
	explicit
	export
	extern
	false
	float
	for
	friend
	goto
	if
	inline
	int
**	late_check
	long
	mutable
	namespace
	new
*	nullptr
	operator
	private
	protected
	public
	register
	reinterpret_cast
**	requires
	return
	short
	signed
	sizeof
	static
*	static_assert
	static_cast
	struct
	switch
	template
	this
*	thread_local
	throw
	true
	try
	typedef
	typeid
	typename
	union
	unsigned
	using
	virtual
	void
	volatile
	wchar_t
	while

alternative representation for operators or punctuators:
	and
	and_eq
	bitand
	bitor
	compl
	not
	not_eq
	or
	or_eq
	xor
	xor_eq