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[libcxx] Remove unused macro _LIBCPP_HAS_UNIQUE_TYPEINFO
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Authored by ldionne on Nov 14 2018, 10:58 AM.

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We already have the negation of that as _LIBCPP_HAS_NONUNIQUE_TYPEINFO.
Having both defined is confusing, since only one of them is used.

This change is pretty much a no-brainer -- speak up if you don't like it and I'll revert.

This revision is now accepted and ready to land.Dec 21 2018, 12:15 PM

This revision was automatically updated to reflect the committed changes.

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include/

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	#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)			#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
	#pragma GCC system_header			#pragma GCC system_header
	#endif			#endif

	#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)			#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
	#include <vcruntime_typeinfo.h>			#include <vcruntime_typeinfo.h>
	#else			#else

	#if !defined(_LIBCPP_ABI_MICROSOFT)			#if defined(_LIBCPP_NONUNIQUE_RTTI_BIT) && !defined(_LIBCPP_ABI_MICROSOFT)
	#if defined(_LIBCPP_NONUNIQUE_RTTI_BIT)
	#define _LIBCPP_HAS_NONUNIQUE_TYPEINFO			# define _LIBCPP_HAS_NONUNIQUE_TYPEINFO
	#else
	#define _LIBCPP_HAS_UNIQUE_TYPEINFO
	#endif
	#endif			#endif

	namespace std // purposefully not using versioning namespace			namespace std // purposefully not using versioning namespace
	{			{

	class _LIBCPP_EXCEPTION_ABI type_info			class _LIBCPP_EXCEPTION_ABI type_info
	{			{
	type_info& operator=(const type_info&);			type_info& operator=(const type_info&);
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