ceil-ieee tests: More tests.

[gnulib.git] / lib / ignore-value.h

diff --git a/lib/ignore-value.h b/lib/ignore-value.h
index 8f60b0e..52919de 100644 (file)
--- a/lib/ignore-value.h
+++ b/lib/ignore-value.h
@@ -1,6 +1,6 @@
 /* ignore a function return without a compiler warning
 
-   Copyright (C) 2008-2011 Free Software Foundation, Inc.
+   Copyright (C) 2008-2012 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -15,7 +15,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-/* Written by Jim Meyering and Pádraig Brady.  */
+/* Written by Jim Meyering, Eric Blake and Pádraig Brady.  */
 
 /* Use "ignore_value" to avoid a warning when using a function declared with
    gcc's warn_unused_result attribute, but for which you really do want to
@@ -35,25 +35,23 @@
 #ifndef _GL_IGNORE_VALUE_H
 # define _GL_IGNORE_VALUE_H
 
-# include <stdint.h>
-
-# ifndef ATTRIBUTE_DEPRECATED
+# ifndef _GL_ATTRIBUTE_DEPRECATED
 /* The __attribute__((__deprecated__)) feature
    is available in gcc versions 3.1 and newer.  */
 #  if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 1)
-#   define ATTRIBUTE_DEPRECATED /* empty */
+#   define _GL_ATTRIBUTE_DEPRECATED /* empty */
 #  else
-#   define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#   define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
 #  endif
 # endif
 
-static inline void _ignore_value (intptr_t p) { (void) p; }
-# define ignore_value(x) _ignore_value ((intptr_t) x)
-
-/* ignore_value works for both scalars and pointers; deprecate ignore_ptr.  */
-static inline void ATTRIBUTE_DEPRECATED
-ignore_ptr (void *p) { (void) p; } /* deprecated: use ignore_value */
-
-/* FIXME: what about aggregate types? */
+/* The __attribute__((__warn_unused_result__)) feature
+   is available in gcc versions 3.4 and newer,
+   while the typeof feature has been available since 2.7 at least.  */
+# if __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
+#  define ignore_value(x) ((void) (x))
+# else
+#  define ignore_value(x) (({ __typeof__ (x) __x = (x); (void) __x; }))
+# endif
 
 #endif