Merge remote-tracking branch 'origin/maint'

[bison.git] / src / state.h

diff --git a/src/state.h b/src/state.h
index 390ab8af2f6f7849784165b7aeb94c717b47030b..37cd9bf9ec7362fa89caf720f32ae20023367a85 100644 (file)
--- a/src/state.h
+++ b/src/state.h
@@ -1,24 +1,22 @@
-/* Type definitions for nondeterministic finite state machine for Bison.
+/* Type definitions for the finite state machine for Bison.
 
-   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2003, 2004, 2007 Free
-   Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 2000-2004, 2007, 2009-2013 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/>.  */
 
 
 /* These type definitions are used to represent a nondeterministic
@@ -121,41 +119,41 @@ typedef struct
    TRANSITIONS->states[Num]?  Can be a token (amongst which the error
    token), or non terminals in case of gotos.  */
 
-#define TRANSITION_SYMBOL(Transitions, Num) \
+# define TRANSITION_SYMBOL(Transitions, Num) \
   (Transitions->states[Num]->accessing_symbol)
 
 /* Is the TRANSITIONS->states[Num] a shift? (as opposed to gotos).  */
 
-#define TRANSITION_IS_SHIFT(Transitions, Num) \
+# define TRANSITION_IS_SHIFT(Transitions, Num) \
   (ISTOKEN (TRANSITION_SYMBOL (Transitions, Num)))
 
 /* Is the TRANSITIONS->states[Num] a goto?. */
 
-#define TRANSITION_IS_GOTO(Transitions, Num) \
+# define TRANSITION_IS_GOTO(Transitions, Num) \
   (!TRANSITION_IS_SHIFT (Transitions, Num))
 
 /* Is the TRANSITIONS->states[Num] labelled by the error token?  */
 
-#define TRANSITION_IS_ERROR(Transitions, Num) \
+# define TRANSITION_IS_ERROR(Transitions, Num) \
   (TRANSITION_SYMBOL (Transitions, Num) == errtoken->number)
 
 /* When resolving a SR conflicts, if the reduction wins, the shift is
    disabled.  */
 
-#define TRANSITION_DISABLE(Transitions, Num) \
+# define TRANSITION_DISABLE(Transitions, Num) \
   (Transitions->states[Num] = NULL)
 
-#define TRANSITION_IS_DISABLED(Transitions, Num) \
+# define TRANSITION_IS_DISABLED(Transitions, Num) \
   (Transitions->states[Num] == NULL)
 
 
 /* Iterate over each transition over a token (shifts).  */
-#define FOR_EACH_SHIFT(Transitions, Iter)                      \
-  for (Iter = 0;                                               \
-       Iter < Transitions->num                                 \
-        && (TRANSITION_IS_DISABLED (Transitions, Iter)         \
-            || TRANSITION_IS_SHIFT (Transitions, Iter));       \
-       ++Iter)                                                 \
+# define FOR_EACH_SHIFT(Transitions, Iter)                       \
+  for (Iter = 0;                                                \
+       Iter < Transitions->num                                  \
+         && (TRANSITION_IS_DISABLED (Transitions, Iter)         \
+             || TRANSITION_IS_SHIFT (Transitions, Iter));       \
+       ++Iter)                                                  \
     if (!TRANSITION_IS_DISABLED (Transitions, Iter))
 
 
@@ -195,6 +193,8 @@ typedef struct
 | states.  |
 `---------*/
 
+struct state_list;
+
 struct state
 {
   state_number number;
@@ -203,6 +203,11 @@ struct state
   reductions *reductions;
   errs *errs;
 
+  /* When an includer (such as ielr.c) needs to store states in a list, the
+     includer can define struct state_list as the list node structure and can
+     store in this member a reference to the node containing each state.  */
+  struct state_list *state_list;
+
   /* If non-zero, then no lookahead sets on reduce actions are needed to
      decide what to do in state S.  */
   char consistent;
@@ -210,6 +215,7 @@ struct state
   /* If some conflicts were solved thanks to precedence/associativity,
      a human readable description of the resolution.  */
   const char *solved_conflicts;
+  const char *solved_conflicts_xml;
 
   /* Its items.  Must be last, since ITEMS can be arbitrarily large.  Sorted
      ascendingly on item index in RITEM, which is sorted on rule number.  */
@@ -222,7 +228,8 @@ extern state *final_state;
 
 /* Create a new state with ACCESSING_SYMBOL for those items.  */
 state *state_new (symbol_number accessing_symbol,
-                 size_t core_size, item_number *core);
+                  size_t core_size, item_number *core);
+state *state_new_isocore (state const *s);
 
 /* Set the transitions of STATE.  */
 void state_transitions_set (state *s, int num, state **trans);
@@ -238,6 +245,8 @@ void state_errs_set (state *s, int num, symbol **errors);
 /* Print on OUT all the lookahead tokens such that this STATE wants to
    reduce R.  */
 void state_rule_lookahead_tokens_print (state *s, rule *r, FILE *out);
+void state_rule_lookahead_tokens_print_xml (state *s, rule *r,
+                                            FILE *out, int level);
 
 /* Create/destroy the states hash table.  */
 void state_hash_new (void);