re2: Merge upstream 2225f94df8ec

third_party/re2/util/util.h

 // Copyright 2009 The RE2 Authors.  All Rights Reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #ifndef RE2_UTIL_UTIL_H__
 #define RE2_UTIL_UTIL_H__
 
 // C
 #include <stdio.h>
 #include <string.h>
@@ skipping 61 matching lines @@
 typedef int32_t int32;
 typedef uint32_t uint32;
 typedef int64_t int64;
 typedef uint64_t uint64;
 
 typedef unsigned long ulong;
 typedef unsigned int uint;
 typedef unsigned short ushort;
 
 // COMPILE_ASSERT causes a compile error about msg if expr is not true.
+#if __cplusplus >= 201103L
+#define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg)
+#else
 template<bool> struct CompileAssert {};
 #define COMPILE_ASSERT(expr, msg) \
   typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+#endif
 
 // DISALLOW_EVIL_CONSTRUCTORS disallows the copy and operator= functions.
 // It goes in the private: declarations in a class.
 #define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
   TypeName(const TypeName&);                 \
   void operator=(const TypeName&)
 
 #define arraysize(array) (sizeof(array)/sizeof((array)[0]))
 
 // Fake lock annotations.  For real ones, see
@@ skipping 43 matching lines @@
 }
 
 }  // namespace re2
 
 #include "util/arena.h"
 #include "util/logging.h"
 #include "util/mutex.h"
 #include "util/utf.h"
 
 #endif // RE2_UTIL_UTIL_H__