Use ASCII for Sebastien Fricker's name.

[bison.git] / src / lalr.h

diff --git a/src/lalr.h b/src/lalr.h
index cd50046bf35c2883e01dcdcbd9fe9936834c7d7e..fe148d035fdabd64a5672188d83404f697ed6463 100644 (file)
--- a/src/lalr.h
+++ b/src/lalr.h
@@ -1,6 +1,6 @@
-/* Compute look-ahead criteria for bison,
+/* Compute lookahead criteria for bison,

 
 

-   Copyright (C) 1984, 1986, 1989, 2000, 2002, 2004 Free Software
+   Copyright (C) 1984, 1986, 1989, 2000, 2002, 2004, 2006 Free Software

    Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
    Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.


@@ -17,8 +17,8 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
 
    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., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */

 
 #ifndef LALR_H_
 # define LALR_H_
 
 #ifndef LALR_H_
 # define LALR_H_


@@ -32,35 +32,41 @@
 /* Import the definition of CORE, TRANSITIONS and REDUCTIONS. */
 # include "state.h"
 
 /* Import the definition of CORE, TRANSITIONS and REDUCTIONS. */
 # include "state.h"
 

-/* Compute how to make the finite state machine deterministic; find
-   which rules need look-ahead in each state, and which look-ahead
-   tokens they accept.  */

 
 

+/** Build the LALR(1) automaton.
+
+   Compute how to make the finite state machine deterministic; find
+   which rules need lookahead in each state, and which lookahead
+   tokens they accept.
+
+   Builds:
+   - #goto_map
+   - #from_state
+   - #to_state
+*/

 void lalr (void);
 
 void lalr (void);
 

-/* Release the information related to look-ahead tokens.  Can be performed
-   once the action tables are computed.  */

 
 

-void lalr_free (void);
+/** Release the information related to lookahead tokens.

 
 

+   Can be performed once the action tables are computed.  */
+void lalr_free (void);

 
 

-/* lalr() builds these data structures. */

 
 

-/* GOTO_MAP, FROM_STATE and TO_STATE -- record each shift transition
-   which accepts a variable (a nonterminal).
+typedef size_t goto_number;
+# define GOTO_NUMBER_MAXIMUM ((goto_number) -1)

 
 

-   FROM_STATE[T] -- state number which a transition leads from.
-   TO_STATE[T] -- state number it leads to.
+/** Index into #from_state and #to_state.

 
    All the transitions that accept a particular variable are grouped
    together and GOTO_MAP[I - NTOKENS] is the index in FROM_STATE and
    TO_STATE of the first of them.  */
 
    All the transitions that accept a particular variable are grouped
    together and GOTO_MAP[I - NTOKENS] is the index in FROM_STATE and
    TO_STATE of the first of them.  */

-
-typedef short int goto_number;
-# define GOTO_NUMBER_MAXIMUM SHRT_MAX
-

 extern goto_number *goto_map;
 extern goto_number *goto_map;

+
+/** State number which a transition leads from. */

 extern state_number *from_state;
 extern state_number *from_state;

+
+/** State number it leads to.  */

 extern state_number *to_state;
 
 
 extern state_number *to_state;