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Date: Sat, 20 Oct 2001 13:18:32 -0700 (PDT)
From: John Mechalas <seagull@aracnet.com>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/31391: usb.h uses a variable name "class" which conflicts with C++
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>Number:         31391
>Category:       kern
>Synopsis:       usb.h uses a variable name "class" which conflicts with C++
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Oct 20 13:20:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     John Mechalas
>Release:        4.4-RELEASE
>Organization:
>Environment:
FreeBSD ebony 4.4-RELEASE FreeBSD 4.4-RELEASE #9: Thu Oct  4 20:40:11 PDT 2001     root@ebony:/usr/src/sys/compile/THINKPAD  i386

>Description:
In /usr/include/dev/usb/usb.h line 501, the definition for 
struct usb_device_info includes the following member:

   u_int8_t        class;                          /* bDeviceClass */

Since "class" is a C++ keyword, this breaks C++ sources that attempt to
#include this file.


>How-To-Repeat:
Compile this with C++

#include <dev/usb/usb.h>
int main (int argc, char **argv)
{
   return 0;
}


You'll get this:

In file included from foo.cc:1:
/usr/include/dev/usb/usb.h:501: syntax error before `;'


>Fix:
Don't use 'class' as a variable name.
>Release-Note:
>Audit-Trail:
>Unformatted:

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