maint: list djgpp/subpipe.c in po/POTFILES.in

[bison.git] / data / lalr1.java

diff --git a/data/lalr1.java b/data/lalr1.java
index 25bb1bdbd55af538e91bf3230d597300b2731285..f7f2ba365b8798e3e4331e1d2dbb0cede3487b96 100644 (file)
--- a/data/lalr1.java
+++ b/data/lalr1.java
@@ -1,6 +1,6 @@
 # Java skeleton for Bison -*- autoconf -*-
 
 # Java skeleton for Bison -*- autoconf -*-
 

-# Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2007-2012 Free Software Foundation, Inc.

 
 # 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
 
 # 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


@@ -25,7 +25,7 @@ m4_ifval(m4_defn([b4_symbol_destructors]),
 m4_divert_push(0)dnl
 @output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
 m4_divert_push(0)dnl
 @output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],

-             [2007, 2008, 2009])
+             [2007-2011])

 
 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */
 
 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */


@@ -102,7 +102,7 @@ b4_token_enums(b4_tokens)
   private ]b4_location_type[ yylloc (YYStack rhs, int n)
   {
     if (n > 0)
   private ]b4_location_type[ yylloc (YYStack rhs, int n)
   {
     if (n > 0)

-      return new ]b4_location_type[ (rhs.locationAt (1).begin, rhs.locationAt (n).end);
+      return new ]b4_location_type[ (rhs.locationAt (n-1).begin, rhs.locationAt (0).end);

     else
       return new ]b4_location_type[ (rhs.locationAt (0).end);
   }]])[
     else
       return new ]b4_location_type[ (rhs.locationAt (0).end);
   }]])[


@@ -255,14 +255,14 @@ b4_lexer_if([[
     }
 
     public final void pop () {
     }
 
     public final void pop () {

-      height--;
+      pop (1);

     }
 
     public final void pop (int num) {
       // Avoid memory leaks... garbage collection is a white lie!
       if (num > 0) {
     }
 
     public final void pop (int num) {
       // Avoid memory leaks... garbage collection is a white lie!
       if (num > 0) {

-       java.util.Arrays.fill (valueStack, height - num + 1, height, null);
-        ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height, null);]])[
+       java.util.Arrays.fill (valueStack, height - num + 1, height + 1, null);
+        ]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height + 1, null);]])[

       }
       height -= num;
     }
       }
       height -= num;
     }


@@ -284,7 +284,7 @@ b4_lexer_if([[
     {
       out.print ("Stack now");
 
     {
       out.print ("Stack now");
 

-      for (int i = 0; i < height; i++)
+      for (int i = 0; i <= height; i++)

         {
          out.print (' ');
          out.print (stateStack[i]);
         {
          out.print (' ');
          out.print (stateStack[i]);


@@ -454,8 +454,6 @@ b4_lexer_if([[
     /// Semantic value of the lookahead.
     b4_yystype[ yylval = null;
 
     /// Semantic value of the lookahead.
     b4_yystype[ yylval = null;
 

-    int yyresult;
-

     yycdebug ("Starting parse\n");
     yyerrstatus_ = 0;
 
     yycdebug ("Starting parse\n");
     yyerrstatus_ = 0;
 


@@ -582,8 +580,10 @@ m4_popdef([b4_at_dollar])])dnl
         /* If not already recovering from an error, report this error.  */
         if (yyerrstatus_ == 0)
           {
         /* If not already recovering from an error, report this error.  */
         if (yyerrstatus_ == 0)
           {

-           ++yynerrs_;
-           yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
+            ++yynerrs_;
+            if (yychar == yyempty_)
+              yytoken = yyempty_;
+            yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));

           }
 
         ]b4_locations_if([yyerrloc = yylloc;])[
           }
 
         ]b4_locations_if([yyerrloc = yylloc;])[


@@ -683,41 +683,73 @@ m4_popdef([b4_at_dollar])])dnl
   {
     if (errorVerbose)
       {
   {
     if (errorVerbose)
       {

-        int yyn = yypact_[yystate];
-        if (yypact_ninf_ < yyn && yyn <= yylast_)
+        /* There are many possibilities here to consider:
+           - Assume YYFAIL is not used.  It's too flawed to consider.
+             See
+             <http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html>
+             for details.  YYERROR is fine as it does not invoke this
+             function.
+           - If this state is a consistent state with a default action,
+             then the only way this function was invoked is if the
+             default action is an error action.  In that case, don't
+             check for expected tokens because there are none.
+           - The only way there can be no lookahead present (in tok) is
+             if this state is a consistent state with a default action.
+             Thus, detecting the absence of a lookahead is sufficient to
+             determine that there is no unexpected or expected token to
+             report.  In that case, just report a simple "syntax error".
+           - Don't assume there isn't a lookahead just because this
+             state is a consistent state with a default action.  There
+             might have been a previous inconsistent state, consistent
+             state with a non-default action, or user semantic action
+             that manipulated yychar.  (However, yychar is currently out
+             of scope during semantic actions.)
+           - Of course, the expected token list depends on states to
+             have correct lookahead information, and it depends on the
+             parser not to perform extra reductions after fetching a
+             lookahead from the scanner and before detecting a syntax
+             error.  Thus, state merging (from LALR or IELR) and default
+             reductions corrupt the expected token list.  However, the
+             list is correct for canonical LR with one exception: it
+             will still contain any token that will not be accepted due
+             to an error action in a later state.
+        */
+        if (tok != yyempty_)

           {
           {

-           StringBuffer res;
-
-           /* Start YYX at -YYN if negative to avoid negative indexes in
-              YYCHECK.  In other words, skip the first -YYN actions for this
-              state because they are default actions.  */
-           int yyxbegin = yyn < 0 ? -yyn : 0;
-
-           /* Stay within bounds of both yycheck and yytname.  */
-           int yychecklim = yylast_ - yyn + 1;
-           int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
-           int count = 0;
-           for (int x = yyxbegin; x < yyxend; ++x)
-             if (yycheck_[x + yyn] == x && x != yyterror_
-                 && !yy_table_value_is_error_ (yytable_[x + yyn]))
-               ++count;
-
-           // FIXME: This method of building the message is not compatible
-           // with internationalization.
-           res = new StringBuffer ("syntax error, unexpected ");
-           res.append (yytnamerr_ (yytname_[tok]));
-           if (count < 5)
-             {
-               count = 0;
-               for (int x = yyxbegin; x < yyxend; ++x)
-                 if (yycheck_[x + yyn] == x && x != yyterror_
-                     && !yy_table_value_is_error_ (yytable_[x + yyn]))
-                   {
-                     res.append (count++ == 0 ? ", expecting " : " or ");
-                     res.append (yytnamerr_ (yytname_[x]));
-                   }
-             }
-           return res.toString ();
+            // FIXME: This method of building the message is not compatible
+            // with internationalization.
+            StringBuffer res =
+              new StringBuffer ("syntax error, unexpected ");
+            res.append (yytnamerr_ (yytname_[tok]));
+            int yyn = yypact_[yystate];
+            if (!yy_pact_value_is_default_ (yyn))
+              {
+                /* Start YYX at -YYN if negative to avoid negative
+                   indexes in YYCHECK.  In other words, skip the first
+                   -YYN actions for this state because they are default
+                   actions.  */
+                int yyxbegin = yyn < 0 ? -yyn : 0;
+                /* Stay within bounds of both yycheck and yytname.  */
+                int yychecklim = yylast_ - yyn + 1;
+                int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+                int count = 0;
+                for (int x = yyxbegin; x < yyxend; ++x)
+                  if (yycheck_[x + yyn] == x && x != yyterror_
+                      && !yy_table_value_is_error_ (yytable_[x + yyn]))
+                    ++count;
+                if (count < 5)
+                  {
+                    count = 0;
+                    for (int x = yyxbegin; x < yyxend; ++x)
+                      if (yycheck_[x + yyn] == x && x != yyterror_
+                          && !yy_table_value_is_error_ (yytable_[x + yyn]))
+                        {
+                          res.append (count++ == 0 ? ", expecting " : " or ");
+                          res.append (yytnamerr_ (yytname_[x]));
+                        }
+                  }
+              }
+            return res.toString ();

           }
       }
 
           }
       }