Some code and documentation improvements.

[bison.git] / data / lalr1.java

# Java skeleton for Bison -*- autoconf -*-

# Copyright (C) 2007, 2008, 2009 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
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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 this program.  If not, see <http://www.gnu.org/licenses/>.

m4_include(b4_pkgdatadir/[java.m4])

b4_defines_if([b4_fatal([%s: %%defines does not make sense in Java], [b4_skeleton])])
m4_ifval(m4_defn([b4_symbol_destructors]),
        [b4_fatal([%s: %%destructor does not make sense in Java], [b4_skeleton])],
        [])

m4_divert_push(0)dnl
@output(b4_parser_file_name@)@
b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
             [2007, 2008, 2009])

b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
])[/* First part of user declarations.  */
]b4_pre_prologue
b4_percent_code_get([[imports]])
[/**
 * A Bison parser, automatically generated from <tt>]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[</tt>.
 *
 * @@author LALR (1) parser skeleton written by Paolo Bonzini.
 */
]b4_public_if([public ])dnl
b4_abstract_if([abstract ])dnl
b4_final_if([final ])dnl
b4_strictfp_if([strictfp ])dnl
[class ]b4_parser_class_name[]dnl
b4_percent_define_get3([extends], [ extends ])dnl
b4_percent_define_get3([implements], [ implements ])[
{
  ]b4_identification[

  /** True if verbose error messages are enabled.  */
  public boolean errorVerbose = ]b4_flag_value([error_verbose]);

b4_locations_if([[
  /**
   * A class defining a pair of positions.  Positions, defined by the
   * <code>]b4_position_type[</code> class, denote a point in the input.
   * Locations represent a part of the input through the beginning
   * and ending positions.  */
  public class ]b4_location_type[ {
    /** The first, inclusive, position in the range.  */
    public ]b4_position_type[ begin;

    /** The first position beyond the range.  */
    public ]b4_position_type[ end;

    /**
     * Create a <code>]b4_location_type[</code> denoting an empty range located at
     * a given point.
     * @@param loc The position at which the range is anchored.  */
    public ]b4_location_type[ (]b4_position_type[ loc) {
      this.begin = this.end = loc;
    }

    /**
     * Create a <code>]b4_location_type[</code> from the endpoints of the range.
     * @@param begin The first position included in the range.
     * @@param end   The first position beyond the range.  */
    public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) {
      this.begin = begin;
      this.end = end;
    }

    /**
     * Print a representation of the location.  For this to be correct,
     * <code>]b4_position_type[</code> should override the <code>equals</code>
     * method.  */
    public String toString () {
      if (begin.equals (end))
        return begin.toString ();
      else
        return begin.toString () + "-" + end.toString ();
    }
  }

]])

[  /** Token returned by the scanner to signal the end of its input.  */
  public static final int EOF = 0;]

b4_token_enums(b4_tokens)

  b4_locations_if([[
  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);
    else
      return new ]b4_location_type[ (rhs.locationAt (0).end);
  }]])[

  /**
   * Communication interface between the scanner and the Bison-generated
   * parser <tt>]b4_parser_class_name[</tt>.
   */
  public interface Lexer {
    ]b4_locations_if([[/**
     * Method to retrieve the beginning position of the last scanned token.
     * @@return the position at which the last scanned token starts.  */
    ]b4_position_type[ getStartPos ();

    /**
     * Method to retrieve the ending position of the last scanned token.
     * @@return the first position beyond the last scanned token.  */
    ]b4_position_type[ getEndPos ();]])[

    /**
     * Method to retrieve the semantic value of the last scanned token.
     * @@return the semantic value of the last scanned token.  */
    ]b4_yystype[ getLVal ();

    /**
     * Entry point for the scanner.  Returns the token identifier corresponding
     * to the next token and prepares to return the semantic value
     * ]b4_locations_if([and beginning/ending positions ])[of the token.
     * @@return the token identifier corresponding to the next token. */
    int yylex () ]b4_maybe_throws([b4_lex_throws])[;

    /**
     * Entry point for error reporting.  Emits an error
     * ]b4_locations_if([referring to the given location ])[in a user-defined way.
     *
     * ]b4_locations_if([[@@param loc The location of the element to which the
     *                error message is related]])[
     * @@param s The string for the error message.  */
     void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String s);]
  }

  b4_lexer_if([[private class YYLexer implements Lexer {
]b4_percent_code_get([[lexer]])[
  }

  ]])[/** The object doing lexical analysis for us.  */
  private Lexer yylexer;
  ]
  b4_parse_param_vars

b4_lexer_if([[
  /**
   * Instantiates the Bison-generated parser.
   */
  public ]b4_parser_class_name (b4_parse_param_decl([b4_lex_param_decl])[) {
    this.yylexer = new YYLexer(]b4_lex_param_call[);
    ]b4_parse_param_cons[
  }
]])

  /**
   * Instantiates the Bison-generated parser.
   * @@param yylexer The scanner that will supply tokens to the parser.
   */
  b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) {
    this.yylexer = yylexer;
    ]b4_parse_param_cons[
  }

  private java.io.PrintStream yyDebugStream = System.err;

  /**
   * Return the <tt>PrintStream</tt> on which the debugging output is
   * printed.
   */
  public final java.io.PrintStream getDebugStream () { return yyDebugStream; }

  /**
   * Set the <tt>PrintStream</tt> on which the debug output is printed.
   * @@param s The stream that is used for debugging output.
   */
  public final void setDebugStream(java.io.PrintStream s) { yyDebugStream = s; }

  private int yydebug = 0;

  /**
   * Answer the verbosity of the debugging output; 0 means that all kinds of
   * output from the parser are suppressed.
   */
  public final int getDebugLevel() { return yydebug; }

  /**
   * Set the verbosity of the debugging output; 0 means that all kinds of
   * output from the parser are suppressed.
   * @@param level The verbosity level for debugging output.
   */
  public final void setDebugLevel(int level) { yydebug = level; }

  private final int yylex () ]b4_maybe_throws([b4_lex_throws]) [{
    return yylexer.yylex ();
  }
  protected final void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String s) {
    yylexer.yyerror (]b4_locations_if([loc, ])[s);
  }

  ]b4_locations_if([
  protected final void yyerror (String s) {
    yylexer.yyerror ((]b4_location_type[)null, s);
  }
  protected final void yyerror (]b4_position_type[ loc, String s) {
    yylexer.yyerror (new ]b4_location_type[ (loc), s);
  }])

  [protected final void yycdebug (String s) {
    if (yydebug > 0)
      yyDebugStream.println (s);
  }

  private final class YYStack {
    private int[] stateStack = new int[16];
    ]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[
    private ]b4_yystype[[] valueStack = new ]b4_yystype[[16];

    public int size = 16;
    public int height = -1;

    public final void push (int state, ]b4_yystype[ value]dnl
			    b4_locations_if([, ]b4_location_type[ loc])[) {
      height++;
      if (size == height)
        {
	  int[] newStateStack = new int[size * 2];
	  System.arraycopy (stateStack, 0, newStateStack, 0, height);
	  stateStack = newStateStack;
	  ]b4_locations_if([[
	  ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
	  System.arraycopy (locStack, 0, newLocStack, 0, height);
	  locStack = newLocStack;]])

	  b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
	  System.arraycopy (valueStack, 0, newValueStack, 0, height);
	  valueStack = newValueStack;

	  size *= 2;
	}

      stateStack[height] = state;
      ]b4_locations_if([[locStack[height] = loc;]])[
      valueStack[height] = value;
    }

    public final void pop () {
      height--;
    }

    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);]])[
      }
      height -= num;
    }

    public final int stateAt (int i) {
      return stateStack[height - i];
    }

    ]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) {
      return locStack[height - i];
    }

    ]])[public final ]b4_yystype[ valueAt (int i) {
      return valueStack[height - i];
    }

    // Print the state stack on the debug stream.
    public void print (java.io.PrintStream out)
    {
      out.print ("Stack now");

      for (int i = 0; i < height; i++)
        {
	  out.print (' ');
	  out.print (stateStack[i]);
        }
      out.println ();
    }
  }

  /**
   * Returned by a Bison action in order to stop the parsing process and
   * return success (<tt>true</tt>).  */
  public static final int YYACCEPT = 0;

  /**
   * Returned by a Bison action in order to stop the parsing process and
   * return failure (<tt>false</tt>).  */
  public static final int YYABORT = 1;

  /**
   * Returned by a Bison action in order to start error recovery without
   * printing an error message.  */
  public static final int YYERROR = 2;

  /**
   * Returned by a Bison action in order to print an error message and start
   * error recovery.  */
  public static final int YYFAIL = 3;

  private static final int YYNEWSTATE = 4;
  private static final int YYDEFAULT = 5;
  private static final int YYREDUCE = 6;
  private static final int YYERRLAB1 = 7;
  private static final int YYRETURN = 8;

  private int yyerrstatus_ = 0;

  /**
   * Return whether error recovery is being done.  In this state, the parser
   * reads token until it reaches a known state, and then restarts normal
   * operation.  */
  public final boolean recovering ()
  {
    return yyerrstatus_ == 0;
  }

  private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
  {
    ]b4_yystype[ yyval;
    ]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[

    /* If YYLEN is nonzero, implement the default value of the action:
       `$$ = $1'.  Otherwise, use the top of the stack.

       Otherwise, the following line sets YYVAL to garbage.
       This behavior is undocumented and Bison
       users should not rely upon it.  */
    if (yylen > 0)
      yyval = yystack.valueAt (yylen - 1);
    else
      yyval = yystack.valueAt (0);

    yy_reduce_print (yyn, yystack);

    switch (yyn)
      {
	]b4_user_actions[
	default: break;
      }

    yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[);

    yystack.pop (yylen);
    yylen = 0;

    /* Shift the result of the reduction.  */
    yyn = yyr1_[yyn];
    int yystate = yypgoto_[yyn - yyntokens_] + yystack.stateAt (0);
    if (0 <= yystate && yystate <= yylast_
	&& yycheck_[yystate] == yystack.stateAt (0))
      yystate = yytable_[yystate];
    else
      yystate = yydefgoto_[yyn - yyntokens_];

    yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
    return YYNEWSTATE;
  }

  /* Return YYSTR after stripping away unnecessary quotes and
     backslashes, so that it's suitable for yyerror.  The heuristic is
     that double-quoting is unnecessary unless the string contains an
     apostrophe, a comma, or backslash (other than backslash-backslash).
     YYSTR is taken from yytname.  */
  private final String yytnamerr_ (String yystr)
  {
    if (yystr.charAt (0) == '"')
      {
        StringBuffer yyr = new StringBuffer ();
        strip_quotes: for (int i = 1; i < yystr.length (); i++)
          switch (yystr.charAt (i))
            {
            case '\'':
            case ',':
              break strip_quotes;

            case '\\':
	      if (yystr.charAt(++i) != '\\')
                break strip_quotes;
              /* Fall through.  */
            default:
              yyr.append (yystr.charAt (i));
              break;

            case '"':
              return yyr.toString ();
            }
      }
    else if (yystr.equals ("$end"))
      return "end of input";

    return yystr;
  }

  /*--------------------------------.
  | Print this symbol on YYOUTPUT.  |
  `--------------------------------*/

  private void yy_symbol_print (String s, int yytype,
			         ]b4_yystype[ yyvaluep]dnl
				 b4_locations_if([, Object yylocationp])[)
  {
    if (yydebug > 0)
    yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
	      + yytname_[yytype] + " ("]b4_locations_if([
	      + yylocationp + ": "])[
	      + (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
  }

  /**
   * Parse input from the scanner that was specified at object construction
   * time.  Return whether the end of the input was reached successfully.
   *
   * @@return <tt>true</tt> if the parsing succeeds.  Note that this does not
   *          imply that there were no syntax errors.
   */
  public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
  {
    /// Lookahead and lookahead in internal form.
    int yychar = yyempty_;
    int yytoken = 0;

    /* State.  */
    int yyn = 0;
    int yylen = 0;
    int yystate = 0;

    YYStack yystack = new YYStack ();

    /* Error handling.  */
    int yynerrs_ = 0;
    ]b4_locations_if([/// The location where the error started.
    ]b4_location_type[ yyerrloc = null;

    /// ]b4_location_type[ of the lookahead.
    ]b4_location_type[ yylloc = new ]b4_location_type[ (null, null);

    /// @@$.
    ]b4_location_type[ yyloc;])

    /// Semantic value of the lookahead.
    b4_yystype[ yylval = null;

    int yyresult;

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

]m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar],     [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
    /* User initialization code.  */
    b4_user_initial_action
m4_popdef([b4_dollar_dollar])dnl
m4_popdef([b4_at_dollar])])dnl

  [  /* Initialize the stack.  */
    yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);

    int label = YYNEWSTATE;
    for (;;)
      switch (label)
      {
        /* New state.  Unlike in the C/C++ skeletons, the state is already
	   pushed when we come here.  */
      case YYNEWSTATE:
        yycdebug ("Entering state " + yystate + "\n");
        if (yydebug > 0)
          yystack.print (yyDebugStream);

        /* Accept?  */
        if (yystate == yyfinal_)
          return true;

        /* Take a decision.  First try without lookahead.  */
        yyn = yypact_[yystate];
        if (yyn == yypact_ninf_)
          {
            label = YYDEFAULT;
	    break;
          }

        /* Read a lookahead token.  */
        if (yychar == yyempty_)
          {
	    yycdebug ("Reading a token: ");
	    yychar = yylex ();]
            b4_locations_if([[
	    yylloc = new ]b4_location_type[(yylexer.getStartPos (),
				            yylexer.getEndPos ());]])
            yylval = yylexer.getLVal ();[
          }

        /* Convert token to internal form.  */
        if (yychar <= EOF)
          {
	    yychar = yytoken = EOF;
	    yycdebug ("Now at end of input.\n");
          }
        else
          {
	    yytoken = yytranslate_ (yychar);
	    yy_symbol_print ("Next token is", yytoken,
			     yylval]b4_locations_if([, yylloc])[);
          }

        /* If the proper action on seeing token YYTOKEN is to reduce or to
           detect an error, take that action.  */
        yyn += yytoken;
        if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
          label = YYDEFAULT;

        /* <= 0 means reduce or error.  */
        else if ((yyn = yytable_[yyn]) <= 0)
          {
	    if (yyn == 0 || yyn == yytable_ninf_)
	      label = YYFAIL;
	    else
	      {
	        yyn = -yyn;
	        label = YYREDUCE;
	      }
          }

        else
          {
            /* Shift the lookahead token.  */
	    yy_symbol_print ("Shifting", yytoken,
			     yylval]b4_locations_if([, yylloc])[);

            /* Discard the token being shifted.  */
            yychar = yyempty_;

            /* Count tokens shifted since error; after three, turn off error
               status.  */
            if (yyerrstatus_ > 0)
              --yyerrstatus_;

            yystate = yyn;
            yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
            label = YYNEWSTATE;
          }
        break;

      /*-----------------------------------------------------------.
      | yydefault -- do the default action for the current state.  |
      `-----------------------------------------------------------*/
      case YYDEFAULT:
        yyn = yydefact_[yystate];
        if (yyn == 0)
          label = YYFAIL;
        else
          label = YYREDUCE;
        break;

      /*-----------------------------.
      | yyreduce -- Do a reduction.  |
      `-----------------------------*/
      case YYREDUCE:
        yylen = yyr2_[yyn];
        label = yyaction (yyn, yystack, yylen);
	yystate = yystack.stateAt (0);
        break;

      /*------------------------------------.
      | yyerrlab -- here on detecting error |
      `------------------------------------*/
      case YYFAIL:
        /* If not already recovering from an error, report this error.  */
        if (yyerrstatus_ == 0)
          {
	    ++yynerrs_;
	    yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
          }

        ]b4_locations_if([yyerrloc = yylloc;])[
        if (yyerrstatus_ == 3)
          {
	    /* If just tried and failed to reuse lookahead token after an
	     error, discard it.  */

	    if (yychar <= EOF)
	      {
	      /* Return failure if at end of input.  */
	      if (yychar == EOF)
	        return false;
	      }
	    else
	      yychar = yyempty_;
          }

        /* Else will try to reuse lookahead token after shifting the error
           token.  */
        label = YYERRLAB1;
        break;

      /*---------------------------------------------------.
      | errorlab -- error raised explicitly by YYERROR.  |
      `---------------------------------------------------*/
      case YYERROR:

        ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
        /* Do not reclaim the symbols of the rule which action triggered
           this YYERROR.  */
        yystack.pop (yylen);
        yylen = 0;
        yystate = yystack.stateAt (0);
        label = YYERRLAB1;
        break;

      /*-------------------------------------------------------------.
      | yyerrlab1 -- common code for both syntax error and YYERROR.  |
      `-------------------------------------------------------------*/
      case YYERRLAB1:
        yyerrstatus_ = 3;	/* Each real token shifted decrements this.  */

        for (;;)
          {
	    yyn = yypact_[yystate];
	    if (yyn != yypact_ninf_)
	      {
	        yyn += yyterror_;
	        if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
	          {
	            yyn = yytable_[yyn];
	            if (0 < yyn)
		      break;
	          }
	      }

	    /* Pop the current state because it cannot handle the error token.  */
	    if (yystack.height == 1)
	      return false;

	    ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
	    yystack.pop ();
	    yystate = yystack.stateAt (0);
	    if (yydebug > 0)
	      yystack.print (yyDebugStream);
          }

	]b4_locations_if([
	/* Muck with the stack to setup for yylloc.  */
	yystack.push (0, null, yylloc);
	yystack.push (0, null, yyerrloc);
        yyloc = yylloc (yystack, 2);
	yystack.pop (2);])[

        /* Shift the error token.  */
        yy_symbol_print ("Shifting", yystos_[yyn],
			 yylval]b4_locations_if([, yyloc])[);

        yystate = yyn;
	yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
        label = YYNEWSTATE;
        break;

        /* Accept.  */
      case YYACCEPT:
        return true;

        /* Abort.  */
      case YYABORT:
        return false;
      }
  }

  // Generate an error message.
  private String yysyntax_error (int yystate, int tok)
  {
    if (errorVerbose)
      {
        int yyn = yypact_[yystate];
        if (yypact_ninf_ < yyn && yyn <= yylast_)
          {
	    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_)
	        ++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_)
		    {
		      res.append (count++ == 0 ? ", expecting " : " or ");
		      res.append (yytnamerr_ (yytname_[x]));
		    }
	      }
	    return res.toString ();
          }
      }

    return "syntax error";
  }


  /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
     STATE-NUM.  */
  private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[;
  private static final ]b4_int_type_for([b4_pact])[ yypact_[] =
  {
    ]b4_pact[
  };

  /* YYDEFACT[S] -- default reduction number in state S.  Performed when
     YYTABLE doesn't specify something else to do.  Zero means the
     default is an error.  */
  private static final ]b4_int_type_for([b4_defact])[ yydefact_[] =
  {
    ]b4_defact[
  };

  /* YYPGOTO[NTERM-NUM].  */
  private static final ]b4_int_type_for([b4_pgoto])[ yypgoto_[] =
  {
    ]b4_pgoto[
  };

  /* YYDEFGOTO[NTERM-NUM].  */
  private static final ]b4_int_type_for([b4_defgoto])[
  yydefgoto_[] =
  {
    ]b4_defgoto[
  };

  /* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
     positive, shift that token.  If negative, reduce the rule which
     number is the opposite.  If zero, do what YYDEFACT says.  */
  private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[;
  private static final ]b4_int_type_for([b4_table])[
  yytable_[] =
  {
    ]b4_table[
  };

  /* YYCHECK.  */
  private static final ]b4_int_type_for([b4_check])[
  yycheck_[] =
  {
    ]b4_check[
  };

  /* STOS_[STATE-NUM] -- The (internal number of the) accessing
     symbol of state STATE-NUM.  */
  private static final ]b4_int_type_for([b4_stos])[
  yystos_[] =
  {
    ]b4_stos[
  };

  /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
     to YYLEX-NUM.  */
  private static final ]b4_int_type_for([b4_toknum])[
  yytoken_number_[] =
  {
    ]b4_toknum[
  };

  /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
  private static final ]b4_int_type_for([b4_r1])[
  yyr1_[] =
  {
    ]b4_r1[
  };

  /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
  private static final ]b4_int_type_for([b4_r2])[
  yyr2_[] =
  {
    ]b4_r2[
  };

  /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
     First, the terminals, then, starting at \a yyntokens_, nonterminals.  */
  private static final String yytname_[] =
  {
    ]b4_tname[
  };

  /* YYRHS -- A `-1'-separated list of the rules' RHS.  */
  private static final ]b4_int_type_for([b4_rhs])[ yyrhs_[] =
  {
    ]b4_rhs[
  };

  /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
     YYRHS.  */
  private static final ]b4_int_type_for([b4_prhs])[ yyprhs_[] =
  {
    ]b4_prhs[
  };

  /* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
  private static final ]b4_int_type_for([b4_rline])[ yyrline_[] =
  {
    ]b4_rline[
  };

  // Report on the debug stream that the rule yyrule is going to be reduced.
  private void yy_reduce_print (int yyrule, YYStack yystack)
  {
    if (yydebug == 0)
      return;

    int yylno = yyrline_[yyrule];
    int yynrhs = yyr2_[yyrule];
    /* Print the symbols being reduced, and their result.  */
    yycdebug ("Reducing stack by rule " + (yyrule - 1)
	      + " (line " + yylno + "), ");

    /* The symbols being reduced.  */
    for (int yyi = 0; yyi < yynrhs; yyi++)
      yy_symbol_print ("   $" + (yyi + 1) + " =",
		       yyrhs_[yyprhs_[yyrule] + yyi],
		       ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
		       b4_rhs_location(yynrhs, yyi + 1)])[);
  }

  /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
  private static final ]b4_int_type_for([b4_translate])[ yytranslate_table_[] =
  {
    ]b4_translate[
  };

  private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t)
  {
    if (t >= 0 && t <= yyuser_token_number_max_)
      return yytranslate_table_[t];
    else
      return yyundef_token_;
  }

  private static final int yylast_ = ]b4_last[;
  private static final int yynnts_ = ]b4_nterms_number[;
  private static final int yyempty_ = -2;
  private static final int yyfinal_ = ]b4_final_state_number[;
  private static final int yyterror_ = 1;
  private static final int yyerrcode_ = 256;
  private static final int yyntokens_ = ]b4_tokens_number[;

  private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[;
  private static final int yyundef_token_ = ]b4_undef_token_number[;

]/* User implementation code.  */
b4_percent_code_get[]dnl

}

b4_epilogue
m4_divert_pop(0)dnl