RE: preprocessor/7452: Preprocessor doesn't allow pasting " foo-> ## BAR "

["David E. Weekly" <david at there dot com>]

The following reply was made to PR preprocessor/7452; it has been noted by GNATS.

From: "David E. Weekly" <david@there.com>
To: "Andrew Pinski" <pinskia@physics.uc.edu>
Cc: <gcc-gnats@gcc.gnu.org>
Subject: RE: preprocessor/7452: Preprocessor doesn't allow pasting " foo-> ## BAR "
Date: Tue, 30 Jul 2002 20:51:01 -0700

 Andrew,
 
 Thank you for your patient explanation. If I do wish to use the modern
 preprocessor, is it possible in any way to have some:
 
 #define foo(A) { bar-> ## A() }
 foo( methodOfBar );
 
 Or, without resorting to the "traditional" CPP, can it simply not be done?
 
 Yours,
  David E. Weekly
  Software Developer
  There, Inc.
 
 
 -----Original Message-----
 From: Andrew Pinski [mailto:pinskia@physics.uc.edu]
 Sent: Tuesday, July 30, 2002 8:42 PM
 To: David E. Weekly
 Cc: gcc-gnats@gcc.gnu.org
 Subject: Re: preprocessor/7452: Preprocessor doesn't allow pasting "
 foo-> ## BAR "
 Importance: High
 
 
 It is illegal because you are trying to paste together two
 tokens which do not make one token in terms of the C standard.
 It has been permanently removed because gcc uses a new
 preprocessor, this has been this way since 3.0.
 You might get what you expect from using the option -traditional-cpp.
 
 Thanks,
 Andrew Pinski
 
 
 
 On Tuesday, July 30, 2002, at 11:30 , David E. Weekly wrote:
 
 > Andrew,
 >
 > Does the standard allow some way to tack on a method name
 > (i.e., "is there
 > another way to do this?"), or has this useful feature simply been
 > permanently removed?
 >
 > Also: why is this construct illegal?
 >
 > Yours,
 >  David E. Weekly
 >  Software Developer
 >  There, Inc.
 >
 > -----Original Message-----
 > From: Andrew Pinski [mailto:pinskia@physics.uc.edu]
 > Sent: Tuesday, July 30, 2002 8:23 PM
 > To: david@there.com
 > Cc: gcc-gnats@gcc.gnu.org
 > Subject: Re: preprocessor/7452: Preprocessor doesn't allow pasting "
 > foo-> ## BAR "
 > Importance: High
 >
 >
 > What you are doing is illegal according the C standard.
 >
 > Thanks,
 > Andrew Pinski
 >
 >
 >