#define _LIBCPP_HAS_NO_CONSTEXPR
#endif
-#if __FreeBSD__ && (__ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L)
+#if defined(__FreeBSD__) && (__ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L)
#define _LIBCPP_HAS_QUICK_EXIT
#define _LIBCPP_HAS_C11_FEATURES
#endif
#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
#endif
-#if defined(__APPLE__) || __FreeBSD__ || _WIN32 || __sun__
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_WIN32) || defined(__sun__)
#define _LIBCPP_LOCALE__L_EXTENSIONS 1
#endif
-#if __FreeBSD__
+#ifdef __FreeBSD__
#define _DECLARE_C99_LDBL_MATH 1
#endif
-#if defined(__APPLE__) || __FreeBSD__
+#if defined(__APPLE__) || defined(__FreeBSD__)
#define _LIBCPP_HAS_DEFAULTRUNELOCALE
#endif
-#if defined(__APPLE__) || __FreeBSD__ || __sun__
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
#define _LIBCPP_WCTYPE_IS_MASK
#endif
#include <locale.h>
#ifdef _WIN32
# include <support/win32/locale_win32.h>
-#elif (__GLIBC__ || defined(__APPLE__) || __FreeBSD__ || __sun__)
+#elif (defined(__GLIBC__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__))
# include <xlocale.h>
#endif // _WIN32 || __GLIBC__ || __APPLE__ || __FreeBSD_
class _LIBCPP_TYPE_VIS ctype_base
{
public:
-#if __GLIBC__
+#ifdef __GLIBC__
typedef unsigned short mask;
static const mask space = _ISspace;
static const mask print = _ISprint;
static const mask punct = _PUNCT;
static const mask xdigit = _HEX;
static const mask blank = _BLANK;
-#elif (__APPLE__ || __FreeBSD__)
-#if __APPLE__
+#elif (defined(__APPLE__) || defined(__FreeBSD__))
+#ifdef __APPLE__
typedef __uint32_t mask;
-#elif __FreeBSD__
+#elif defined(__FreeBSD__)
typedef unsigned long mask;
#endif
static const mask space = _CTYPE_S;
static const mask punct = _CTYPE_P;
static const mask xdigit = _CTYPE_X;
static const mask blank = _CTYPE_B;
-#elif __sun__
+#elif defined(__sun__)
typedef unsigned int mask;
static const mask space = _ISSPACE;
static const mask print = _ISPRINT;
_LIBCPP_BEGIN_NAMESPACE_STD
-#if defined(__APPLE__) || __FreeBSD__
+#if defined(__APPLE__) || defined(__FreeBSD__)
# define _LIBCPP_GET_C_LOCALE 0
#else
# define _LIBCPP_GET_C_LOCALE __cloc()
#include "limits"
#include <sys/types.h>
#if !defined(_WIN32)
-#if !__sun__ && !__linux__
+#if !defined(__sun__) && !defined(__linux__)
#include <sys/sysctl.h>
#else
#include <unistd.h>