parse.cc

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// A Bison parser, made by GNU Bison 3.0.4.19-fbaf.

// Skeleton implementation for Bison LALR(1) parsers in C++

// Copyright (C) 2002-2015 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/>.

// As a special exception, you may create a larger work that contains
// part or all of the Bison parser skeleton and distribute that work
// under terms of your choice, so long as that work isn't itself a
// parser generator using the skeleton or a modified version thereof
// as a parser skeleton.  Alternatively, if you modify or redistribute
// the parser skeleton itself, you may (at your option) remove this
// special exception, which will cause the skeleton and the resulting
// Bison output files to be licensed under the GNU General Public
// License without this special exception.

// This special exception was added by the Free Software Foundation in
// version 2.2 of Bison.


// First part of user declarations.

#line 37 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:404

# ifndef YY_NULLPTR
#  if defined __cplusplus && 201103L <= __cplusplus
#   define YY_NULLPTR nullptr
#  else
#   define YY_NULLPTR 0
#  endif
# endif

#include "parse.hh"

// User implementation prologue.

#line 51 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:412
// Unqualified %code blocks.
#line 63 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:413

  #include <lib/vcsn/rat/driver.hh>
  #include <lib/vcsn/rat/scan.hh>
  #include <vcsn/dyn/algos.hh>

#define TRY(Loc, Stm)                           \
  try                                           \
    {                                           \
      Stm;                                      \
    }                                           \
  catch (std::exception& e)                     \
    {                                           \
      error(Loc, e.what());                     \
      YYERROR;                                  \
    }

  namespace vcsn
  {
    namespace rat
    {
      static inline
      dyn::expression prefer(const dyn::expression& e,
                             const dyn::expression& f);

      static inline
      dyn::context ctx(const driver& d)
      {
        return d.context();
      }

      static inline
      identities ids(const driver& d)
      {
        return d.identities();
      }

      static inline
      parser::symbol_type yylex(driver& d)
      {
        return d.scanner_->lex(d);
      }
    }
  }

#line 102 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:413


#ifndef YY_
# if defined YYENABLE_NLS && YYENABLE_NLS
#  if ENABLE_NLS
#   include <libintl.h> // FIXME: INFRINGES ON USER NAME SPACE.
#   define YY_(msgid) dgettext ("bison-runtime", msgid)
#  endif
# endif
# ifndef YY_
#  define YY_(msgid) msgid
# endif
#endif

#define YYRHSLOC(Rhs, K) ((Rhs)[K].location)
/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
   If N is 0, then set CURRENT to the empty location which ends
   the previous symbol: RHS[0] (always defined).  */

# ifndef YYLLOC_DEFAULT
#  define YYLLOC_DEFAULT(Current, Rhs, N)                               \
    do                                                                  \
      if (N)                                                            \
        {                                                               \
          (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
          (Current).end    = YYRHSLOC (Rhs, N).end;                     \
        }                                                               \
      else                                                              \
        {                                                               \
          (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
        }                                                               \
    while (/*CONSTCOND*/ false)
# endif


// Suppress unused-variable warnings by "using" E.
#define YYUSE(E) ((void) (E))

// Enable debugging if requested.
#if YYDEBUG

// A pseudo ostream that takes yydebug_ into account.
# define YYCDEBUG if (yydebug_) (*yycdebug_)

# define YY_SYMBOL_PRINT(Title, Symbol)         \
  do {                                          \
    if (yydebug_)                               \
    {                                           \
      *yycdebug_ << Title << ' ';               \
      yy_print_ (*yycdebug_, Symbol);           \
      *yycdebug_ << std::endl;                  \
    }                                           \
  } while (false)

# define YY_REDUCE_PRINT(Rule)          \
  do {                                  \
    if (yydebug_)                       \
      yy_reduce_print_ (Rule);          \
  } while (false)

# define YY_STACK_PRINT()               \
  do {                                  \
    if (yydebug_)                       \
      yystack_print_ ();                \
  } while (false)

#else // !YYDEBUG

# define YYCDEBUG if (false) std::cerr
# define YY_SYMBOL_PRINT(Title, Symbol)  YYUSE(Symbol)
# define YY_REDUCE_PRINT(Rule)           static_cast<void>(0)
# define YY_STACK_PRINT()                static_cast<void>(0)

#endif // !YYDEBUG

#define yyerrok         (yyerrstatus_ = 0)
#define yyclearin       (yyla.clear ())

#define YYACCEPT        goto yyacceptlab
#define YYABORT         goto yyabortlab
#define YYERROR         goto yyerrorlab
#define YYRECOVERING()  (!!yyerrstatus_)

#line 11 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:479
namespace vcsn { namespace rat {
#line 188 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:479

  /* 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.  */
  std::string
  parser::yytnamerr_ (const char *yystr)
  {
    if (*yystr == '"')
      {
        std::string yyr = "";
        char const *yyp = yystr;

        for (;;)
          switch (*++yyp)
            {
            case '\'':
            case ',':
              goto do_not_strip_quotes;

            case '\\':
              if (*++yyp != '\\')
                goto do_not_strip_quotes;
              // Fall through.
            default:
              yyr += *yyp;
              break;

            case '"':
              return yyr;
            }
      do_not_strip_quotes: ;
      }

    return yystr;
  }


  parser::parser (driver& driver__yyarg)
    :
#if YYDEBUG
      yydebug_ (false),
      yycdebug_ (&std::cerr),
#endif
      driver_ (driver__yyarg)
  {}

  parser::~parser ()
  {}


  /*---------------.
  | Symbol types.  |
  `---------------*/



  // by_state.
  inline
  parser::by_state::by_state ()
    : state (empty_state)
  {}

  inline
  parser::by_state::by_state (const by_state& other)
    : state (other.state)
  {}

  inline
  void
  parser::by_state::clear ()
  {
    state = empty_state;
  }

  inline
  void
  parser::by_state::move (by_state& that)
  {
    state = that.state;
    that.clear ();
  }

  inline
  parser::by_state::by_state (state_type s)
    : state (s)
  {}

  inline
  parser::symbol_number_type
  parser::by_state::type_get () const
  {
    if (state == empty_state)
      return empty_symbol;
    else
      return yystos_[state];
  }

  inline
  parser::stack_symbol_type::stack_symbol_type ()
  {}


  inline
  parser::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& that)
    : super_type (s, that.location)
  {
      switch (that.type_get ())
    {
      case 31: // input
      case 33: // sum
      case 34: // tuple
      case 38: // exp
        value.move< braced_expression > (that.value);
        break;

      case 40: // class
        value.move< class_t > (that.value);
        break;

      case 39: // weights
        value.move< dyn::weight > (that.value);
        break;

      case 24: // "*"
        value.move< irange_type > (that.value);
        break;

      case 25: // "letter"
      case 26: // "weight"
        value.move< std::string > (that.value);
        break;

      case 36: // tuple.1
        value.move< std::vector<vcsn::dyn::expression> > (that.value);
        break;

      default:
        break;
    }

    // that is emptied.
    that.type = empty_symbol;
  }

  inline
  parser::stack_symbol_type&
  parser::stack_symbol_type::operator= (const stack_symbol_type& that)
  {
    state = that.state;
      switch (that.type_get ())
    {
      case 31: // input
      case 33: // sum
      case 34: // tuple
      case 38: // exp
        value.copy< braced_expression > (that.value);
        break;

      case 40: // class
        value.copy< class_t > (that.value);
        break;

      case 39: // weights
        value.copy< dyn::weight > (that.value);
        break;

      case 24: // "*"
        value.copy< irange_type > (that.value);
        break;

      case 25: // "letter"
      case 26: // "weight"
        value.copy< std::string > (that.value);
        break;

      case 36: // tuple.1
        value.copy< std::vector<vcsn::dyn::expression> > (that.value);
        break;

      default:
        break;
    }

    location = that.location;
    return *this;
  }


  template <typename Base>
  inline
  void
  parser::yy_destroy_ (const char* yymsg, basic_symbol<Base>& yysym) const
  {
    if (yymsg)
      YY_SYMBOL_PRINT (yymsg, yysym);
  }

#if YYDEBUG
  template <typename Base>
  void
  parser::yy_print_ (std::ostream& yyo,
                                     const basic_symbol<Base>& yysym) const
  {
    std::ostream& yyoutput = yyo;
    YYUSE (yyoutput);
    symbol_number_type yytype = yysym.type_get ();
    // Avoid a (spurious) G++ 4.8 warning about "array subscript is
    // below array bounds".
    if (yysym.empty ())
      std::abort ();
    yyo << (yytype < yyntokens_ ? "token" : "nterm")
        << ' ' << yytname_[yytype] << " ("
        << yysym.location << ": ";
    switch (yytype)
    {
            case 25: // "letter"

#line 119 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        { yyo << '"' << yysym.value.template as< std::string > () << '"'; }
#line 411 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 26: // "weight"

#line 126 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        { yyo << '<' << yysym.value.template as< std::string > () << '>'; }
#line 418 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 31: // input
//-
//-#line 128 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
//-        {
//-  dyn::print(yysym.value.template as< braced_expression > ().exp, yyo);
//-  yyo << (yysym.value.template as< braced_expression > ().lparen ? " (lpar, " : " (no lpar, ");
//-  yyo << (yysym.value.template as< braced_expression > ().rparen ? "rpar)" : "no rpar)");
//-}
//-#line 429 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
//-        break;

      case 33: // sum
//-
//-#line 128 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
//-        {
//-  dyn::print(yysym.value.template as< braced_expression > ().exp, yyo);
//-  yyo << (yysym.value.template as< braced_expression > ().lparen ? " (lpar, " : " (no lpar, ");
//-  yyo << (yysym.value.template as< braced_expression > ().rparen ? "rpar)" : "no rpar)");
//-}
//-#line 440 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
//-        break;

      case 34: // tuple

#line 128 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        {
  dyn::print(yysym.value.template as< braced_expression > ().exp, yyo);
  yyo << (yysym.value.template as< braced_expression > ().lparen ? " (lpar, " : " (no lpar, ");
  yyo << (yysym.value.template as< braced_expression > ().rparen ? "rpar)" : "no rpar)");
}
#line 451 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 36: // tuple.1

#line 134 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        {
  const char* sep = "[[";
  for (auto e: yysym.value.template as< std::vector<vcsn::dyn::expression> > ())
    {
      yyo << sep << e;
      sep = " || ";
    }
  yyo << "]]";
}
#line 466 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 38: // exp

#line 128 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        {
  dyn::print(yysym.value.template as< braced_expression > ().exp, yyo);
  yyo << (yysym.value.template as< braced_expression > ().lparen ? " (lpar, " : " (no lpar, ");
  yyo << (yysym.value.template as< braced_expression > ().rparen ? "rpar)" : "no rpar)");
}
#line 477 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 39: // weights

#line 144 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        { dyn::print(yysym.value.template as< dyn::weight > (), yyo); }
#line 484 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;

      case 40: // class

#line 121 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:636
        {
  yyo << '[';
  for (auto c: yysym.value.template as< class_t > ()) yyo << c.first << "-" << c.second;
  yyo << ']';
}
#line 495 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:636
        break;


      default:
        break;
    }
    yyo << ')';
  }
#endif

  inline
  void
  parser::yypush_ (const char* m, state_type s, symbol_type& sym)
  {
    stack_symbol_type t (s, sym);
    yypush_ (m, t);
  }

  inline
  void
  parser::yypush_ (const char* m, stack_symbol_type& s)
  {
    if (m)
      YY_SYMBOL_PRINT (m, s);
    yystack_.push (s);
  }

  inline
  void
  parser::yypop_ (unsigned int n)
  {
    yystack_.pop (n);
  }

#if YYDEBUG
  std::ostream&
  parser::debug_stream () const
  {
    return *yycdebug_;
  }

  void
  parser::set_debug_stream (std::ostream& o)
  {
    yycdebug_ = &o;
  }


  parser::debug_level_type
  parser::debug_level () const
  {
    return yydebug_;
  }

  void
  parser::set_debug_level (debug_level_type l)
  {
    yydebug_ = l;
  }
#endif // YYDEBUG

  inline parser::state_type
  parser::yy_lr_goto_state_ (state_type yystate, int yysym)
  {
    int yyr = yypgoto_[yysym - yyntokens_] + yystate;
    if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
      return yytable_[yyr];
    else
      return yydefgoto_[yysym - yyntokens_];
  }

  inline bool
  parser::yy_pact_value_is_default_ (int yyvalue)
  {
    return yyvalue == yypact_ninf_;
  }

  inline bool
  parser::yy_table_value_is_error_ (int yyvalue)
  {
    return yyvalue == yytable_ninf_;
  }

  int
  parser::parse ()
  {
    // State.
    int yyn;
    int yylen = 0;

    // Error handling.
    int yynerrs_ = 0;
    int yyerrstatus_ = 0;

    symbol_type yyla;

    stack_symbol_type yyerror_range[3];

    int yyresult;

    // FIXME: This shoud be completely indented.  It is not yet to
    // avoid gratuitous conflicts when merging into the master branch.
    try
      {
    YYCDEBUG << "Starting parse" << std::endl;


    // User initialization code.
    #line 115 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:741
{
  yyla.location = driver_.location_;
}

#line 613 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:741

    /* Initialize the stack.  The initial state will be set in
       yynewstate, since the latter expects the semantical and the
       location values to have been already stored, initialize these
       stacks with a primary value.  */
    yystack_.clear ();
    yypush_ (YY_NULLPTR, 0, yyla);

    // A new symbol was pushed on the stack.
  yynewstate:
    YYCDEBUG << "Entering state " << yystack_[0].state << std::endl;

    // Accept?
    if (yystack_[0].state == yyfinal_)
      goto yyacceptlab;

    goto yybackup;

    // Backup.
  yybackup:

    // Try to take a decision without lookahead.
    yyn = yypact_[yystack_[0].state];
    if (yy_pact_value_is_default_ (yyn))
      goto yydefault;

    // Read a lookahead token.
    if (yyla.empty ())
      {
        YYCDEBUG << "Reading a token: ";
        try
          {
            symbol_type yylookahead (yylex (driver_));
            yyla.move (yylookahead);
          }
        catch (const syntax_error& yyexc)
          {
            error (yyexc);
            goto yyerrlab1;
          }
      }
    YY_SYMBOL_PRINT ("Next token is", yyla);

    /* If the proper action on seeing token YYLA.TYPE is to reduce or
       to detect an error, take that action.  */
    yyn += yyla.type_get ();
    if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type_get ())
      goto yydefault;

    // Reduce or error.
    yyn = yytable_[yyn];
    if (yyn <= 0)
      {
        if (yy_table_value_is_error_ (yyn))
          goto yyerrlab;
        yyn = -yyn;
        goto yyreduce;
      }

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

    // Shift the lookahead token.
    yypush_ ("Shifting", yyn, yyla);
    goto yynewstate;

  /*-----------------------------------------------------------.
  | yydefault -- do the default action for the current state.  |
  `-----------------------------------------------------------*/
  yydefault:
    yyn = yydefact_[yystack_[0].state];
    if (yyn == 0)
      goto yyerrlab;
    goto yyreduce;

  /*-----------------------------.
  | yyreduce -- Do a reduction.  |
  `-----------------------------*/
  yyreduce:
    yylen = yyr2_[yyn];
    {
      stack_symbol_type yylhs;
      yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);
      /* Variants are always initialized to an empty instance of the
         correct type. The default '$$ = $1' action is NOT applied
         when using variants.  */
        switch (yyr1_[yyn])
    {
      case 31: // input
      case 33: // sum
      case 34: // tuple
      case 38: // exp
        yylhs.value.build< braced_expression > ();
        break;

      case 40: // class
        yylhs.value.build< class_t > ();
        break;

      case 39: // weights
        yylhs.value.build< dyn::weight > ();
        break;

      case 24: // "*"
        yylhs.value.build< irange_type > ();
        break;

      case 25: // "letter"
      case 26: // "weight"
        yylhs.value.build< std::string > ();
        break;

      case 36: // tuple.1
        yylhs.value.build< std::vector<vcsn::dyn::expression> > ();
        break;

      default:
        break;
    }


      // Compute the default @$.
      {
        slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
        YYLLOC_DEFAULT (yylhs.location, slice, yylen);
      }

      // Perform the reduction.
      YY_REDUCE_PRINT (yyn);
      try
        {
          switch (yyn)
            {
  case 2:
#line 199 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {
    // Provide a value for $$ only for sake of traces: shows the result.
    yylhs.value.as< braced_expression > () = yystack_[1].value.as< braced_expression > ();
    if (driver_.tapes_.back() != driver_.tape_ctx_.size())
      throw parser::syntax_error(yylhs.location, "not enough tapes");
    driver_.result_ = yylhs.value.as< braced_expression > ().exp;
    YYACCEPT;
  }
#line 758 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 3:
#line 210 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {}
#line 764 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 4:
#line 211 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { driver_.scanner_->yyin->putback(','); }
#line 770 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 5:
#line 212 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { driver_.scanner_->yyin->putback(')'); }
#line 776 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 6:
#line 216 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = yystack_[0].value.as< braced_expression > (); }
#line 782 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 7:
#line 217 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::sum(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 788 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 8:
#line 223 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { driver_.tape_push(); }
#line 794 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 9:
#line 224 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {
    driver_.tape_pop();
    if (yystack_[0].value.as< std::vector<vcsn::dyn::expression> > ().size() == 1)
      yylhs.value.as< braced_expression > () = yystack_[0].value.as< std::vector<vcsn::dyn::expression> > ().back();
    else if (yystack_[0].value.as< std::vector<vcsn::dyn::expression> > ().size() == driver_.tape_ctx_.size())
      yylhs.value.as< braced_expression > () = vcsn::dyn::tuple(yystack_[0].value.as< std::vector<vcsn::dyn::expression> > ());
    else
      throw parser::syntax_error(yylhs.location, "not enough tapes");
  }
#line 808 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 10:
#line 237 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {
    yylhs.value.as< std::vector<vcsn::dyn::expression> > ().emplace_back(yystack_[0].value.as< braced_expression > ().exp);
  }
#line 816 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 11:
#line 240 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { driver_.tape_inc(yystack_[0].location); }
#line 822 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 12:
#line 241 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {
    yylhs.value.as< std::vector<vcsn::dyn::expression> > () = yystack_[3].value.as< std::vector<vcsn::dyn::expression> > ();
    yylhs.value.as< std::vector<vcsn::dyn::expression> > ().emplace_back(yystack_[0].value.as< braced_expression > ().exp);
  }
#line 831 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 13:
#line 248 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::multiply(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 837 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 14:
#line 249 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::conjunction(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 843 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 15:
#line 250 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::shuffle(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 849 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 16:
#line 251 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::infiltration(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 855 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 17:
#line 252 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = prefer(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 861 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 18:
#line 253 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::ldiv(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 867 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 19:
#line 254 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::rdiv(yystack_[2].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp); }
#line 873 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 20:
#line 255 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::conjunction(yystack_[2].value.as< braced_expression > ().exp,
                                                      dyn::complement(yystack_[0].value.as< braced_expression > ().exp)); }
#line 880 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 21:
#line 257 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::left_mult(yystack_[1].value.as< dyn::weight > (), yystack_[0].value.as< braced_expression > ().exp); }
#line 886 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 22:
#line 258 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::right_mult(yystack_[1].value.as< braced_expression > ().exp, yystack_[0].value.as< dyn::weight > ()); }
#line 892 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 23:
#line 260 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {
    // See README.txt.
    if (!yystack_[1].value.as< braced_expression > ().rparen && !yystack_[0].value.as< braced_expression > ().lparen)
      yylhs.value.as< braced_expression > () = dyn::concatenate(yystack_[1].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp);
    else
      {
        yylhs.value.as< braced_expression > ().exp = dyn::multiply(yystack_[1].value.as< braced_expression > ().exp, yystack_[0].value.as< braced_expression > ().exp);
        yylhs.value.as< braced_expression > ().lparen = yystack_[1].value.as< braced_expression > ().lparen;
        yylhs.value.as< braced_expression > ().rparen = yystack_[0].value.as< braced_expression > ().rparen;
      }
  }
#line 908 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 24:
#line 271 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { TRY(yylhs.location,
                          yylhs.value.as< braced_expression > () =
                          dyn::multiply(yystack_[1].value.as< braced_expression > ().exp,
                                        std::get<0>(yystack_[0].value.as< irange_type > ()), std::get<1>(yystack_[0].value.as< irange_type > ()))); }
#line 917 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 25:
#line 275 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::complement(yystack_[1].value.as< braced_expression > ().exp); }
#line 923 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 26:
#line 276 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::transposition(yystack_[1].value.as< braced_expression > ().exp); }
#line 929 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 27:
#line 277 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::expression_zero(ctx(driver_), ids(driver_)); }
#line 935 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 28:
#line 278 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = dyn::expression_one(ctx(driver_), ids(driver_)); }
#line 941 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 29:
#line 279 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = driver_.make_atom(yystack_[0].location, yystack_[0].value.as< std::string > ()); }
#line 947 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 30:
#line 280 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = driver_.make_expression(yylhs.location, yystack_[1].value.as< class_t > (), true); }
#line 953 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 31:
#line 281 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > () = driver_.make_expression(yylhs.location, yystack_[1].value.as< class_t > (), false); }
#line 959 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 32:
#line 282 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< braced_expression > ().exp = yystack_[1].value.as< braced_expression > ().exp; yylhs.value.as< braced_expression > ().lparen = yylhs.value.as< braced_expression > ().rparen = true; }
#line 965 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 33:
#line 286 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< dyn::weight > () = driver_.make_weight(yystack_[0].location, yystack_[0].value.as< std::string > ()); }
#line 971 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 34:
#line 287 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< dyn::weight > () = dyn::multiply(driver_.make_weight(yystack_[1].location, yystack_[1].value.as< std::string > ()), yystack_[0].value.as< dyn::weight > ()); }
#line 977 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 35:
#line 291 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    {}
#line 983 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 36:
#line 292 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< class_t > () = yystack_[1].value.as< class_t > (); yylhs.value.as< class_t > ().emplace(yystack_[0].value.as< std::string > (), yystack_[0].value.as< std::string > ()); }
#line 989 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;

  case 37:
#line 293 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:859
    { yylhs.value.as< class_t > () = yystack_[3].value.as< class_t > (); yylhs.value.as< class_t > ().emplace(yystack_[2].value.as< std::string > (), yystack_[0].value.as< std::string > ()); }
#line 995 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
    break;


#line 999 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:859
            default:
              break;
            }
        }
      catch (const syntax_error& yyexc)
        {
          error (yyexc);
          YYERROR;
        }
      YY_SYMBOL_PRINT ("-> $$ =", yylhs);
      yypop_ (yylen);
      yylen = 0;
      YY_STACK_PRINT ();

      // Shift the result of the reduction.
      yypush_ (YY_NULLPTR, yylhs);
    }
    goto yynewstate;

  /*--------------------------------------.
  | yyerrlab -- here on detecting error.  |
  `--------------------------------------*/
  yyerrlab:
    // If not already recovering from an error, report this error.
    if (!yyerrstatus_)
      {
        ++yynerrs_;
        error (yyla.location, yysyntax_error_ (yystack_[0].state, yyla));
      }


    yyerror_range[1].location = yyla.location;
    if (yyerrstatus_ == 3)
      {
        /* If just tried and failed to reuse lookahead token after an
           error, discard it.  */

        // Return failure if at end of input.
        if (yyla.type_get () == yyeof_)
          YYABORT;
        else if (!yyla.empty ())
          {
            yy_destroy_ ("Error: discarding", yyla);
            yyla.clear ();
          }
      }

    // Else will try to reuse lookahead token after shifting the error token.
    goto yyerrlab1;


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

    /* Pacify compilers like GCC when the user code never invokes
       YYERROR and the label yyerrorlab therefore never appears in user
       code.  */
    if (false)
      goto yyerrorlab;
    yyerror_range[1].location = yystack_[yylen].location;
    /* Do not reclaim the symbols of the rule whose action triggered
       this YYERROR.  */
    yypop_ (yylen);
    yylen = 0;
    goto yyerrlab1;

  /*-------------------------------------------------------------.
  | yyerrlab1 -- common code for both syntax error and YYERROR.  |
  `-------------------------------------------------------------*/
  yyerrlab1:
    yyerrstatus_ = 3;   // Each real token shifted decrements this.
    {
      stack_symbol_type error_token;
      for (;;)
        {
          yyn = yypact_[yystack_[0].state];
          if (!yy_pact_value_is_default_ (yyn))
            {
              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_.size () == 1)
            YYABORT;

          yyerror_range[1].location = yystack_[0].location;
          yy_destroy_ ("Error: popping", yystack_[0]);
          yypop_ ();
          YY_STACK_PRINT ();
        }

      yyerror_range[2].location = yyla.location;
      YYLLOC_DEFAULT (error_token.location, yyerror_range, 2);

      // Shift the error token.
      error_token.state = yyn;
      yypush_ ("Shifting", error_token);
    }
    goto yynewstate;

    // Accept.
  yyacceptlab:
    yyresult = 0;
    goto yyreturn;

    // Abort.
  yyabortlab:
    yyresult = 1;
    goto yyreturn;

  yyreturn:
    if (!yyla.empty ())
      yy_destroy_ ("Cleanup: discarding lookahead", yyla);

    /* Do not reclaim the symbols of the rule whose action triggered
       this YYABORT or YYACCEPT.  */
    yypop_ (yylen);
    while (1 < yystack_.size ())
      {
        yy_destroy_ ("Cleanup: popping", yystack_[0]);
        yypop_ ();
      }

    return yyresult;
  }
    catch (...)
      {
        YYCDEBUG << "Exception caught: cleaning lookahead and stack"
                 << std::endl;
        // Do not try to display the values of the reclaimed symbols,
        // as their printer might throw an exception.
        if (!yyla.empty ())
          yy_destroy_ (YY_NULLPTR, yyla);

        while (1 < yystack_.size ())
          {
            yy_destroy_ (YY_NULLPTR, yystack_[0]);
            yypop_ ();
          }
        throw;
      }
  }

  void
  parser::error (const syntax_error& yyexc)
  {
    error (yyexc.location, yyexc.what());
  }

  // Generate an error message.
  std::string
  parser::yysyntax_error_ (state_type yystate, const symbol_type& yyla) const
  {
    // Number of reported tokens (one for the "unexpected", one per
    // "expected").
    size_t yycount = 0;
    // Its maximum.
    enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
    // Arguments of yyformat.
    char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];

    /* There are many possibilities here to consider:
       - 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 yyla) 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
         yyla.  (However, yyla is currently not documented for users.)
       - 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 (!yyla.empty ())
      {
        int yytoken = yyla.type_get ();
        yyarg[yycount++] = yytname_[yytoken];
        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_;
            for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
              if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
                  && !yy_table_value_is_error_ (yytable_[yyx + yyn]))
                {
                  if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
                    {
                      yycount = 1;
                      break;
                    }
                  else
                    yyarg[yycount++] = yytname_[yyx];
                }
          }
      }

    char const* yyformat = YY_NULLPTR;
    switch (yycount)
      {
#define YYCASE_(N, S)                         \
        case N:                               \
          yyformat = S;                       \
        break
        YYCASE_(0, YY_("syntax error"));
        YYCASE_(1, YY_("syntax error, unexpected %s"));
        YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
        YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
        YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
        YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
#undef YYCASE_
      }

    std::string yyres;
    // Argument number.
    size_t yyi = 0;
    for (char const* yyp = yyformat; *yyp; ++yyp)
      if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)
        {
          yyres += yytnamerr_ (yyarg[yyi++]);
          ++yyp;
        }
      else
        yyres += *yyp;
    return yyres;
  }


  const signed char parser::yypact_ninf_ = -17;

  const signed char parser::yytable_ninf_ = -1;

  const short int
  parser::yypact_[] =
  {
     -17,    11,     2,   -17,   145,   -17,   -17,   -17,   -17,   -17,
      22,   -17,   -17,   -17,   -17,     0,    23,    55,   145,   -17,
     -17,   -16,   -12,   -17,   -17,   145,   145,   145,   145,   -17,
     145,   145,   145,   145,   -17,   -17,    -8,   108,     3,    -6,
     -17,    32,   -17,   145,   125,   125,   130,   125,    -8,    79,
     103,   130,   -17,    18,    55,   -17
  };

  const unsigned char
  parser::yydefact_[] =
  {
       8,     0,     3,     6,     0,     1,     4,     8,     5,     2,
      35,     8,    28,    27,    29,    33,     9,    10,     0,     7,
      35,     0,     0,    34,    11,     0,     0,     0,     0,    25,
       0,     0,     0,     0,    26,    24,    23,    22,    21,     0,
      30,    36,    32,     0,    14,    16,    18,    15,    13,    17,
      20,    19,    31,     0,    12,    37
  };

  const signed char
  parser::yypgoto_[] =
  {
     -17,   -17,   -17,    30,   -17,   -17,   -17,   -17,    20,   -15,
      24
  };

  const signed char
  parser::yydefgoto_[] =
  {
      -1,     1,     9,     2,     3,     4,    16,    43,    36,    18,
      21
  };

  const unsigned char
  parser::yytable_[] =
  {
      23,    29,    37,    40,    10,    11,     7,    12,    42,    41,
       6,     5,    29,    52,    34,    13,    35,    14,    15,    41,
       7,    37,     8,    37,    17,    34,    15,    35,    20,    37,
      37,    37,    37,    37,    37,    37,    37,    19,    38,    37,
      24,    22,    53,    55,    39,    44,    45,    46,    47,     0,
      48,    49,    50,    51,     0,     0,     0,    38,    25,    26,
      27,     0,    28,    54,    29,     0,    30,    10,    11,    31,
      12,    32,     0,     0,     0,     0,    33,    34,    13,    35,
      14,    15,    25,    26,    27,     0,    28,     0,    29,     0,
      30,    10,    11,     0,    12,    32,     0,     0,     0,     0,
      33,    34,    13,    35,    14,    15,    25,    26,    27,     0,
      28,     0,    29,     0,    30,    10,    11,     0,    12,     0,
      10,    11,     0,    12,    33,    34,    13,    35,    14,    15,
      27,    13,     0,    14,    29,    27,    30,    10,    11,    29,
      12,    30,    10,    11,     0,    12,    33,    34,    13,    35,
      14,    15,    34,    13,    35,    14,    15,    10,    11,     0,
      12,     0,     0,     0,     0,     0,     0,     0,    13,     0,
      14,    15
  };

  const signed char
  parser::yycheck_[] =
  {
      15,     9,    17,    19,    12,    13,    18,    15,    20,    25,
       8,     0,     9,    19,    22,    23,    24,    25,    26,    25,
      18,    36,    20,    38,     4,    22,    26,    24,     6,    44,
      45,    46,    47,    48,    49,    50,    51,     7,    18,    54,
      17,    11,    10,    25,    20,    25,    26,    27,    28,    -1,
      30,    31,    32,    33,    -1,    -1,    -1,    37,     3,     4,
       5,    -1,     7,    43,     9,    -1,    11,    12,    13,    14,
      15,    16,    -1,    -1,    -1,    -1,    21,    22,    23,    24,
      25,    26,     3,     4,     5,    -1,     7,    -1,     9,    -1,
      11,    12,    13,    -1,    15,    16,    -1,    -1,    -1,    -1,
      21,    22,    23,    24,    25,    26,     3,     4,     5,    -1,
       7,    -1,     9,    -1,    11,    12,    13,    -1,    15,    -1,
      12,    13,    -1,    15,    21,    22,    23,    24,    25,    26,
       5,    23,    -1,    25,     9,     5,    11,    12,    13,     9,
      15,    11,    12,    13,    -1,    15,    21,    22,    23,    24,
      25,    26,    22,    23,    24,    25,    26,    12,    13,    -1,
      15,    -1,    -1,    -1,    -1,    -1,    -1,    -1,    23,    -1,
      25,    26
  };

  const unsigned char
  parser::yystos_[] =
  {
       0,    31,    33,    34,    35,     0,     8,    18,    20,    32,
      12,    13,    15,    23,    25,    26,    36,    38,    39,    33,
       6,    40,    33,    39,    17,     3,     4,     5,     7,     9,
      11,    14,    16,    21,    22,    24,    38,    39,    38,    40,
      19,    25,    20,    37,    38,    38,    38,    38,    38,    38,
      38,    38,    19,    10,    38,    25
  };

  const unsigned char
  parser::yyr1_[] =
  {
       0,    30,    31,    32,    32,    32,    33,    33,    35,    34,
      36,    37,    36,    38,    38,    38,    38,    38,    38,    38,
      38,    38,    38,    38,    38,    38,    38,    38,    38,    38,
      38,    38,    38,    39,    39,    40,    40,    40
  };

  const unsigned char
  parser::yyr2_[] =
  {
       0,     2,     2,     0,     1,     1,     1,     3,     0,     2,
       1,     0,     4,     3,     3,     3,     3,     3,     3,     3,
       3,     2,     2,     2,     2,     2,     2,     1,     1,     1,
       3,     4,     3,     1,     2,     0,     2,     4
  };



  // YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
  // First, the terminals, then, starting at \a yyntokens_, nonterminals.
  const char*
  const parser::yytname_[] =
  {
  "\"end\"", "error", "$undefined", "\"&\"", "\"&:\"", "\"{\\\\}\"",
  "\"^\"", "\":\"", "\",\"", "\"{c}\"", "\"-\"", "\".\"", "\"[\"", "\"(\"",
  "\"<+\"", "\"\\\\e\"", "\"%\"", "\"|\"", "\"+\"", "\"]\"", "\")\"",
  "\"{/}\"", "\"{T}\"", "\"\\\\z\"", "\"*\"", "\"letter\"", "\"weight\"",
  "CONCAT", "RWEIGHT", "LWEIGHT", "$accept", "input", "terminator.opt",
  "sum", "tuple", "$@1", "tuple.1", "$@2", "exp", "weights", "class", YY_NULLPTR
  };

#if YYDEBUG
  const unsigned short int
  parser::yyrline_[] =
  {
       0,   198,   198,   210,   211,   212,   216,   217,   223,   223,
     236,   240,   240,   248,   249,   250,   251,   252,   253,   254,
     255,   257,   258,   259,   271,   275,   276,   277,   278,   279,
     280,   281,   282,   286,   287,   291,   292,   293
  };

  // Print the state stack on the debug stream.
  void
  parser::yystack_print_ ()
  {
    *yycdebug_ << "Stack now";
    for (stack_type::const_iterator
           i = yystack_.begin (),
           i_end = yystack_.end ();
         i != i_end; ++i)
      *yycdebug_ << ' ' << i->state;
    *yycdebug_ << std::endl;
  }

  // Report on the debug stream that the rule \a yyrule is going to be reduced.
  void
  parser::yy_reduce_print_ (int yyrule)
  {
    unsigned 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 << "):" << std::endl;
    // The symbols being reduced.
    for (int yyi = 0; yyi < yynrhs; yyi++)
      YY_SYMBOL_PRINT ("   $" << yyi + 1 << " =",
                       yystack_[(yynrhs) - (yyi + 1)]);
  }
#endif // YYDEBUG


#line 11 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:1167
} } // vcsn::rat
#line 1426 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.cc" // lalr1.cc:1167
#line 296 "/Users/akim/src/lrde/2/lib/vcsn/rat/parse.yy" // lalr1.cc:1168


namespace vcsn
{
  namespace rat
  {
    // "e <+ f = e + (f % e) = e + e{c} & f".
    static
    dyn::expression prefer(const dyn::expression& e, const dyn::expression& f)
    {
      return dyn::sum(e, dyn::conjunction(dyn::complement(e), f));
    }

    void
    vcsn::rat::parser::error(const location_type& l, const std::string& m)
    {
      driver_.error(l, m);
    }
  }
}