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Guard macro

From: Hans Aberg
Subject: Guard macro
Date: Wed, 29 Dec 2004 19:15:37 +0100
User-agent: Microsoft-Outlook-Express-Macintosh-Edition/5.0.6

The larl1.cc file has:

/* FIXME: This is wrong, we want computed header guards.
   I don't know why the macros are missing now. :( */

For use with Bison 2.0, I have in my skeleton file
                                [[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])])
[#]ifndef b4_header_guard
[#] define b4_header_guard
[#]endif /* ndef b4_header_guard */

For some reason, unknown to me, one has to bracket the #.

The reason that the stuff above does not work with Bison 2.0. is that
(relative Bison 1.75), some code was zipped out of prepare() in output.c:
static void
prepare (void)

  /* File names.  */
  MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix :
  /* Put this is: */
  MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
  MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
  MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);

In fact, it would be good if a few more macors were created here, so that
one can customize output better.

  Hans Aberg

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