[Midnightbsd-cvs] src [10986] trunk/include/assert.h: add static assert

[laffer1 at midnightbsd.org]

Revision: 10986
          http://svnweb.midnightbsd.org/src/?rev=10986
Author:   laffer1
Date:     2018-06-15 16:36:10 -0400 (Fri, 15 Jun 2018)
Log Message:
-----------
add static assert

Modified Paths:
--------------
    trunk/include/assert.h

Modified: trunk/include/assert.h
===================================================================
--- trunk/include/assert.h	2018-06-15 20:35:57 UTC (rev 10985)
+++ trunk/include/assert.h	2018-06-15 20:36:10 UTC (rev 10986)
@@ -1,3 +1,4 @@
+/* $MidnightBSD$ */
 /*-
  * Copyright (c) 1992, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -32,7 +33,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)assert.h	8.2 (Berkeley) 1/21/94
- * $MidnightBSD$
+ * $FreeBSD: stable/10/include/assert.h 228955 2011-12-29 14:41:17Z ed $
  */
 
 #include <sys/cdefs.h>
@@ -57,7 +58,22 @@
 
 #ifndef _ASSERT_H_
 #define _ASSERT_H_
+
+/*
+ * Static assertions.  In principle we could define static_assert for
+ * C++ older than C++11, but this breaks if _Static_assert is
+ * implemented as a macro.
+ *
+ * C++ template parameters may contain commas, even if not enclosed in
+ * parentheses, causing the _Static_assert macro to be invoked with more
+ * than two parameters.
+ */
+#if __ISO_C_VISIBLE >= 2011 && !defined(__cplusplus)
+#define	static_assert	_Static_assert
+#endif
+
 __BEGIN_DECLS
 void __assert(const char *, const char *, int, const char *) __dead2;
 __END_DECLS
+
 #endif /* !_ASSERT_H_ */