From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?=E6=9D=8E=E5=BE=AE?= <leethium@163.com>
To: 9fans <9fans@cse.psu.edu>
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Date: Sat, 12 Nov 2005 18:00:36 +0800
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Subject: [9fans] USED() macro
Topicbox-Message-UUID: ab6a8bbc-ead0-11e9-9d60-3106f5b1d025

In plan9port, USED() is defined as

        #define USED(x) if(x){}else{}

Does it mean that USED() can only be applied on variables of "scalar
types"? But r is of a struct type in

        void
        drawresizewindow(Rectangle r)
        {
        	USED(r);
        	
        	bad();
        }

in $PLAN9/src/libdraw/nowsys-wsys.c.

When compiling, 9c complains on that. A bug? Or an extension of Plan 9's
C dialect?