portability: fix several issues with M4 subprocess.

[bison.git] / src / location.h

diff --git a/src/location.h b/src/location.h
index 0b4f715a2cca17585443ddabe444034c406128d7..d8c4c8a8a9698d00e76ee069f38250d5aaa6d419 100644 (file)
--- a/src/location.h
+++ b/src/location.h
@@ -1,22 +1,20 @@
 /* Locations for Bison
-   Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
-   Bison is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   Bison is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef LOCATION_H_
 # define LOCATION_H_
@@ -29,13 +27,20 @@ typedef struct
   /* The name of the file that contains the boundary.  */
   uniqstr file;
 
-  /* The (origin-1) line that contains the boundary.
-     If this is INT_MAX, the line number has overflowed.  */
+  /* If nonnegative, the (origin-1) line that contains the boundary.
+     If this is INT_MAX, the line number has overflowed.
+
+     Meaningless and not displayed if negative.
+  */
   int line;
 
-  /* The (origin-1) column just after the boundary.  This is neither a
-     byte count, nor a character count; it is a column count.
-     If this is INT_MAX, the column number has overflowed.  */
+  /* If nonnegative, the (origin-1) column just after the boundary.
+     This is neither a byte count, nor a character count; it is a
+     column count.  If this is INT_MAX, the column number has
+     overflowed.
+
+     Meaningless and not displayed if negative.
+  */
   int column;
 
 } boundary;