Justification

Keywords from C++ shall not be used as identifier names because of portability and interoperability.

Example

int class; /* WRONG */

Note

C++ keywords that are not available in C are:

alignas	alignof	auto	bool
catch	char16_t	char32_t	class
constexpr	const_cast	decltype	delete
dynamic_cast	explicit	export	false
friend	mutable	namespace	new
noexcept	nullptr	operator	private
protected	public	public	reinterpret_cast
static_assert	static_cast	template	this
thread_local	throw	true	try
typeid	typename	using	virtual
wchar_t