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[libiberty] Add ARG_UNUSED as a C++-friendly replacement for ATTRIBUTE_UNUSED
- From: Bernardo Innocenti <bernie at develer dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>, gdb-patches at sources dot redhat dot com, binutils at sources dot redhat dot com, Ian Lance Taylor <ian at wasabisystems dot com>,DJ Delorie <dj at redhat dot com>
- Date: Mon, 12 Jul 2004 01:52:29 +0200
- Subject: [libiberty] Add ARG_UNUSED as a C++-friendly replacement for ATTRIBUTE_UNUSED
- Organization: Develer S.r.l.
Hello,
this patch adds the ARG_UNUSED() macro to be used in place of
ATTRIBUTE_UNUSED. The syntax looks like this:
void foo (ARG_UNUSED (int, x))
{
}
The C++ frontend can't parse attribute((unused)) when it
appears after the variable name. The cleanest work-around
is using the standard C++ syntax to specify unused
parameters, which can also be used when bootstrapping from
other C++ compilers.
This patch is a prerequisite for the upcoming C++ bootstrap
patches that I've been preparing.
include/
2004-07-11 Bernardo Innocenti <bernie@develer.com>
* ansidecl.h (ARG_UNUSED): New Macro.
diff -u -p -r1.16 ansidecl.h
--- ansidecl.h 17 Jun 2003 14:10:00 -0000 1.16
+++ ansidecl.h 11 Jul 2004 15:38:23 -0000
@@ -312,4 +312,10 @@ So instead we use the macro below and te
#define __extension__
#endif
+#ifdef __cplusplus
+# define ARG_UNUSED(T, N) T
+#else
+# define ARG_UNUSED(T, N) T N ATTRIBUTE_UNUSED
+#endif
+
#endif /* ansidecl.h */
--
// Bernardo Innocenti - Develer S.r.l., R&D dept.
\X/ http://www.develer.com/