X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/996b1c7e8cb8168c5c533e387b03ddab7d270af7..3e7a2cd95f9ca7ee02eca7ca91df5b4a85fea9ff:/data/lalr1.cc diff --git a/data/lalr1.cc b/data/lalr1.cc index 1e3162db..d0f3a730 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,6 +1,8 @@ m4_divert(-1) + # C++ skeleton for Bison -# Copyright (C) 2002 Free Software Foundation, Inc. + +# Copyright (C) 2002, 2003, 2004, 2005 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 @@ -14,758 +16,1028 @@ m4_divert(-1) # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA -# 02111-1307 USA - -m4_include([c.m4]) - -## ---------------- ## -## Default values. ## -## ---------------- ## - -# Stack parameters. -m4_define_default([b4_stack_depth_init], [200]) - -# Default Parser class name. -m4_define_default([b4_parser_class_name], [Parser]) - - - -## ----------------- ## -## Semantic Values. ## -## ----------------- ## - - -# b4_lhs_value([TYPE]) -# -------------------- -# Expansion of $$. -m4_define([b4_lhs_value], -[yyval[]m4_ifval([$1], [.$1])]) - - -# b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) -# -------------------------------------- -# Expansion of $NUM, where the current rule has RULE-LENGTH -# symbols on RHS. -m4_define([b4_rhs_value], -[semantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3])]) - -m4_define_default([b4_location_type], [Location]) - -# b4_lhs_location() -# ----------------- -# Expansion of @$. -m4_define([b4_lhs_location], -[yyloc]) - - -# b4_rhs_location(RULE-LENGTH, NUM) -# --------------------------------- -# Expansion of @NUM, where the current rule has RULE-LENGTH symbols -# on RHS. -m4_define([b4_rhs_location], -[location_stack_@{m4_eval([$1 - $2])@}]) - - -m4_define([b4_inherit], - [m4_ifdef([b4_root], - [: public b4_root -], - [])]) - -m4_define([b4_param], - [m4_ifdef([b4_root], - [, - const Param& param], - [])]) - -m4_define([b4_constructor], - [m4_ifdef([b4_root], - [b4_root (param), - ], - [])]) +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +# 02110-1301 USA +m4_include(b4_pkgdatadir/[c++.m4]) +# Backward compatibility. +m4_define([b4_location_constructors]) +m4_include(b4_pkgdatadir/[location.cc]) # We do want M4 expansion after # for CPP macros. m4_changecom() m4_divert(0)dnl -@output @output_header_name@ +m4_if(b4_defines_flag, 0, [], +[@output @output_header_name@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [2002])[ -/* FIXME: This is wrong, we want computed header guards. - I don't know why the macros are missing now. :( */ + [2002, 2003, 2004, 2005]) +dnl FIXME: This is wrong, we want computed header guards. +[/* As a special exception, when this parser skeleton is copied by + Bison into a Bison output file, you may use that output file + without restriction. This special exception was added by the Free + Software Foundation for C++ LALR(1) parsers in version 2.2 of + Bison. */ + +/* C++ LALR(1) parser skeleton written by Akim Demaille. */ + #ifndef PARSER_HEADER_H # define PARSER_HEADER_H -#include "stack.hh" -#include "location.hh" - #include #include +#include "stack.hh" -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ - -]b4_token_defines(b4_tokens)[ +namespace yy +{ + class position; + class location; +} -/* Copy the first part of user declarations. */ +/* First part of user declarations. */ ]b4_pre_prologue[ ]/* Line __line__ of lalr1.cc. */ b4_syncline([@oline@], [@ofile@])[ +]dnl Include location.hh here: it might depend on headers included above. +[#include "location.hh" + /* Enabling traces. */ #ifndef YYDEBUG # define YYDEBUG ]b4_debug[ #endif -/* Enabling verbose error message. */ -#ifndef YYERROR_VERBOSE +/* Enabling verbose error messages. */ +#ifdef YYERROR_VERBOSE +# undef YYERROR_VERBOSE +# define YYERROR_VERBOSE 1 +#else # define YYERROR_VERBOSE ]b4_error_verbose[ #endif -#ifndef YYSTYPE -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_filename]) -typedef union b4_stype yystype; -/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])], -[typedef int yystype;])[ -# define YYSTYPE yystype +/* Enabling the token table. */ +#ifndef YYTOKEN_TABLE +# define YYTOKEN_TABLE ]b4_token_table[ #endif -/* Copy the second part of user declarations. */ -]b4_post_prologue[ +/* 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). */ -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ #ifndef YYLLOC_DEFAULT -# define YYLLOC_DEFAULT(Current, Rhs, N) \ - Current.last_line = Rhs[N].last_line; \ - Current.last_column = Rhs[N].last_column; +# define YYLLOC_DEFAULT(Current, Rhs, N) \ +do { \ + if (N) \ + { \ + (Current).begin = (Rhs)[1].begin; \ + (Current).end = (Rhs)[N].end; \ + } \ + else \ + { \ + (Current).begin = (Current).end = (Rhs)[0].end; \ + } \ +} while (false) #endif namespace yy { - class ]b4_parser_class_name[; - - template < typename P > - struct Traits - { - }; - template < > - struct Traits< ]b4_parser_class_name[ > - { - typedef ]b4_int_type_for([b4_translate])[ TokenNumberType; - typedef ]b4_int_type_for([b4_rhs])[ RhsNumberType; - typedef int StateType; - typedef yystype SemanticType; - typedef ]b4_location_type[ LocationType; - }; -} - -namespace yy -{ - class ]b4_parser_class_name b4_inherit[ + /// A Bison parser. + class ]b4_parser_class_name[ { public: - - typedef Traits< ]b4_parser_class_name[ >::TokenNumberType TokenNumberType; - typedef Traits< ]b4_parser_class_name[ >::RhsNumberType RhsNumberType; - typedef Traits< ]b4_parser_class_name[ >::StateType StateType; - typedef Traits< ]b4_parser_class_name[ >::SemanticType SemanticType; - typedef Traits< ]b4_parser_class_name[ >::LocationType LocationType; - - typedef Stack< StateType > StateStack; - typedef Stack< SemanticType > SemanticStack; - typedef Stack< LocationType > LocationStack; - -#if YYLSP_NEEDED - ]b4_parser_class_name[ (bool debug, - LocationType initlocation][]b4_param[) : - ]b4_constructor[][debug_ (debug), - cdebug_ (std::cerr), - initlocation_ (initlocation) + /// Symbol semantic values. +#if ! defined (YYSTYPE) +]m4_ifdef([b4_stype], +[b4_syncline([b4_stype_line], [b4_file_name]) + union semantic_type b4_stype; +/* Line __line__ of lalr1.cc. */ +b4_syncline([@oline@], [@ofile@])], +[ typedef int semantic_type;])[ #else - ]b4_parser_class_name[ (bool debug][]b4_param[) : - ]b4_constructor[][debug_ (debug), - cdebug_ (std::cerr) + typedef YYSTYPE semantic_type; #endif + /// Symbol locations. + typedef ]b4_location_type[ location_type; + /// Tokens. + struct token { - } + ]b4_token_enums(b4_tokens)[ + }; - virtual ~]b4_parser_class_name[ () - { - } + /// Build a parser object. + ]b4_parser_class_name[ (]b4_parse_param_decl[); + virtual ~]b4_parser_class_name[ (); + /// Parse. + /// \returns 0 iff parsing succeeded. virtual int parse (); - private: + /// The current debugging stream. + std::ostream& debug_stream () const; + /// Set the current debugging stream. + void set_debug_stream (std::ostream &); - virtual void lex_ (); - virtual void error_ (); - virtual void print_ (); + /// Type for debugging levels. + typedef int debug_level_type; + /// The current debugging level. + debug_level_type debug_level () const; + /// Set the current debugging level. + void set_debug_level (debug_level_type l); - /* Stacks. */ - StateStack state_stack_; - SemanticStack semantic_stack_; - LocationStack location_stack_; + private: + /// Report a syntax error. + /// \param loc where the syntax error is found. + /// \param msg a description of the syntax error. + virtual void error (const location_type& loc, const std::string& msg); + + /// Generate an error message. + /// \param state the state where the error occurred. + /// \param tok the look-ahead token. + virtual std::string yysyntax_error_ (int yystate]dnl +b4_error_verbose_if([, int tok])[); +#if YYDEBUG + /// \brief Report a symbol on the debug stream. + /// \param yytype The token type. + /// \param yyvaluep Its semantic value. + /// \param yylocationp Its location. + virtual void yysymprint_ (int yytype, + const semantic_type* yyvaluep, + const location_type* yylocationp); +#endif /* ! YYDEBUG */ + + + /// State numbers. + typedef int state_type; + /// State stack type. + typedef stack state_stack_type; + /// Semantic value stack type. + typedef stack semantic_stack_type; + /// location stack type. + typedef stack location_stack_type; + + /// The state stack. + state_stack_type yystate_stack_; + /// The semantic value stack. + semantic_stack_type yysemantic_stack_; + /// The location stack. + location_stack_type yylocation_stack_; + + /// Internal symbol numbers. + typedef ]b4_int_type_for([b4_translate])[ token_number_type; /* Tables. */ - static const ]b4_int_type_for([b4_pact])[ pact_[]; - static const ]b4_int_type_for([b4_pact])[ pact_ninf_; - static const ]b4_int_type_for([b4_defact])[ defact_[]; - static const ]b4_int_type_for([b4_pgoto])[ pgoto_[]; - static const ]b4_int_type_for([b4_defgoto])[ defgoto_[]; - static const ]b4_int_type_for([b4_table])[ table_[]; - static const ]b4_int_type_for([b4_table])[ table_ninf_; - static const ]b4_int_type_for([b4_check])[ check_[]; - static const ]b4_int_type_for([b4_r1])[ r1_[]; - static const ]b4_int_type_for([b4_r2])[ r2_[]; - -#if YYDEBUG || YYERROR_VERBOSE - static const char* const name_[]; + /// For a state, the index in \a yytable_ of its portion. + static const ]b4_int_type_for([b4_pact])[ yypact_[]; + static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_; + + /// For a state, default rule to reduce. + /// Unless\a yytable_ specifies something else to do. + /// Zero means the default is an error. + static const ]b4_int_type_for([b4_defact])[ yydefact_[]; + + static const ]b4_int_type_for([b4_pgoto])[ yypgoto_[]; + static const ]b4_int_type_for([b4_defgoto])[ yydefgoto_[]; + + /// What to do in a state. + /// \a yytable_[yypact_[s]]: what to do in state \a s. + /// - if positive, shift that token. + /// - if negative, reduce the rule which number is the opposite. + /// - if zero, do what YYDEFACT says. + static const ]b4_int_type_for([b4_table])[ yytable_[]; + static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_; + + static const ]b4_int_type_for([b4_check])[ yycheck_[]; + + /// For a state, its accessing symbol. + static const ]b4_int_type_for([b4_stos])[ yystos_[]; + + /// For a rule, its LHS. + static const ]b4_int_type_for([b4_r1])[ yyr1_[]; + /// For a rule, its RHS length. + static const ]b4_int_type_for([b4_r2])[ yyr2_[]; + +#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE + /// For a symbol, its name in clear. + static const char* const yytname_[]; +#endif + +#if YYERROR_VERBOSE + /// Convert the symbol name \a n to a form suitable for a diagnostic. + virtual std::string yytnamerr_ (const char *n); #endif - /* More tables, for debugging. */ #if YYDEBUG - static const RhsNumberType rhs_[]; - static const ]b4_int_type_for([b4_prhs])[ prhs_[]; - static const ]b4_int_type_for([b4_rline])[ rline_[]; - static const ]b4_int_type_for([b4_stos])[ stos_[]; - static const ]b4_int_type_for([b4_toknum])[ token_number_[]; + /// A type to store symbol numbers and -1. + typedef ]b4_int_type_for([b4_rhs])[ rhs_number_type; + /// A `-1'-separated list of the rules' RHS. + static const rhs_number_type yyrhs_[]; + /// For each rule, the index of the first RHS symbol in \a yyrhs_. + static const ]b4_int_type_for([b4_prhs])[ yyprhs_[]; + /// For each rule, its source line number. + static const ]b4_int_type_for([b4_rline])[ yyrline_[]; + /// For each scanner token number, its symbol number. + static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[]; + /// Report on the debug stream that the rule \a r is going to be reduced. + virtual void yy_reduce_print_ (int r); + /// Print the state stack on the debug stream. + virtual void yystack_print_ (); #endif - /* Even more tables. */ - static inline TokenNumberType translate_ (int token); + /// Convert a scanner token number to a symbol number. + inline token_number_type yytranslate_ (int token); + + /// \brief Reclaim the memory associated to a symbol. + /// \param yymsg Why this token is reclaimed. + /// \param yytype The symbol type. + /// \param yyvaluep Its semantic value. + /// \param yylocationp Its location. + inline void yydestruct_ (const char* yymsg, + int yytype, + semantic_type* yyvaluep, + location_type* yylocationp); + + /// Pop \a n symbols the three stacks. + inline void yypop_ (unsigned int n = 1); /* Constants. */ - static const int eof_; + static const int yyeof_; /* LAST_ -- Last index in TABLE_. */ - static const int last_; - static const int nnts_; - static const int empty_; - static const int final_; - static const int terror_; - static const int errcode_; - static const int ntokens_; - static const int initdepth_; - static const unsigned user_token_number_max_; - static const TokenNumberType undef_token_; - - /* State. */ - int n_; - int len_; - int state_; + static const int yylast_; + static const int yynnts_; + static const int yyempty_; + static const int yyfinal_; + static const int yyterror_; + static const int yyerrcode_; + static const int yyntokens_; + static const unsigned int yyuser_token_number_max_; + static const token_number_type yyundef_token_; /* Debugging. */ - int debug_; - std::ostream &cdebug_; - - /* Lookahead and lookahead in internal form. */ - int looka_; - int ilooka_; - - /* Message. */ - std::string message; - - /* Semantic value and location of lookahead token. */ - SemanticType value; - LocationType location; - - /* @@$ and $$. */ - SemanticType yyval; - LocationType yyloc; + int yydebug_; + std::ostream* yycdebug_; - /* Initial location. */ - LocationType initlocation_; +]b4_parse_param_vars[ }; } +]m4_ifset([b4_global_tokens_and_yystype], +[b4_token_defines(b4_tokens) + +#ifndef YYSTYPE + /* Redirection for backward compatibility. */ +# define YYSTYPE yy::b4_parser_class_name::semantic_type +#endif +])[ #endif /* ! defined PARSER_HEADER_H */] -dnl +])dnl @output @output_parser_name@ b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [2002])[ - -#include @output_header_name@ + [2002, 2003, 2004, 2005]) +m4_if(b4_prefix[], [yy], [], +[ +// Take the name prefix into account. +#define yylex b4_prefix[]lex]) +m4_if(b4_defines_flag, 0, [], +[ +#include @output_header_name@])[ + +/* User implementation prologue. */ +]b4_post_prologue[ -/* Enable debugging if requested. */ -#if YYDEBUG -# define YYCDEBUG if (debug_) cdebug_ -#else /* !YYDEBUG */ -# define YYCDEBUG if (0) cdebug_ -#endif /* !YYDEBUG */ +]/* Line __line__ of lalr1.cc. */ +b4_syncline([@oline@], [@ofile@])[ -int -yy::]b4_parser_class_name[::parse () -{ - int nerrs = 0; - int errstatus = 0; - - /* Initialize stack. */ - state_stack_ = StateStack (0); - semantic_stack_ = SemanticStack (1); - location_stack_ = LocationStack (1); - - /* Start. */ - state_ = 0; - looka_ = empty_; -#if YYLSP_NEEDED - location = initlocation_; +#ifndef YY_ +# if YYENABLE_NLS +# if ENABLE_NLS +# include /* FIXME: INFRINGES ON USER NAME SPACE */ +# define YY_(msgid) dgettext ("bison-runtime", msgid) +# endif +# endif +# ifndef YY_ +# define YY_(msgid) msgid +# endif #endif - YYCDEBUG << "Starting parse" << std::endl; - - /* New state. */ - yynewstate: - state_stack_.push (state_); - YYCDEBUG << "Entering state " << state_ << std::endl; - goto yybackup; - /* Backup. */ - yybackup: +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) ((void) (e)) - /* Try to take a decision without lookahead. */ - n_ = pact_[state_]; - if (n_ == pact_ninf_) - goto yydefault; +/* A pseudo ostream that takes yydebug_ into account. */ +# define YYCDEBUG \ + for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \ + (*yycdebug_) - /* Read a lookahead token. */ - if (looka_ == empty_) - { - YYCDEBUG << "Reading a token: "; - lex_ (); - } - - /* Convert token to internal form. */ - if (looka_ <= 0) - { - looka_ = eof_; - ilooka_ = 0; - YYCDEBUG << "Now at end of input." << std::endl; - } - else - { - ilooka_ = translate_ (looka_); +/* Enable debugging if requested. */ #if YYDEBUG - if (debug_) - { - YYCDEBUG << "Next token is " << looka_ - << " (" << name_[ilooka_]; - print_ (); - YYCDEBUG << ')' << std::endl; - } -#endif - } - n_ += ilooka_; - if (n_ < 0 || last_ < n_ || check_[n_] != ilooka_) - goto yydefault; +# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ +do { \ + if (yydebug_) \ + { \ + *yycdebug_ << Title << ' '; \ + yysymprint_ ((Type), (Value), (Location)); \ + *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) - /* Reduce or error. */ - n_ = table_[n_]; - if (n_ < 0) - { - if (n_ == table_ninf_) - goto yyerrlab; - else - { - n_ = -n_; - goto yyreduce; - } - } - else if (n_ == 0) - goto yyerrlab; - - /* Accept? */ - if (n_ == final_) - goto yyacceptlab; - - /* Shift the lookahead token. */ - YYCDEBUG << "Shifting token " << looka_ - << " (" << name_[ilooka_] << "), "; - - /* Discard the token being shifted unless it is eof. */ - if (looka_ != eof_) - looka_ = empty_; - - semantic_stack_.push (value); - location_stack_.push (location); - - /* Count tokens shifted since error; after three, turn off error - status. */ - if (errstatus) - --errstatus; - - state_ = n_; - goto yynewstate; - - /* Default action. */ - yydefault: - n_ = defact_[state_]; - if (n_ == 0) - goto yyerrlab; - goto yyreduce; - - /* Reduce. */ - yyreduce: - len_ = r2_[n_]; - if (len_) - { - yyval = semantic_stack_[len_ - 1]; - yyloc = location_stack_[len_ - 1]; - } - else - { - yyval = semantic_stack_[0]; - yyloc = location_stack_[0]; - } - -#if YYDEBUG - if (debug_) - { - YYCDEBUG << "Reducing via rule " << n_ - 1 - << " (line " << rline_[n_] << "), "; - for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_]; - 0 <= rhs_[i]; ++i) - YYCDEBUG << name_[rhs_[i]] << ' '; - YYCDEBUG << "-> " << name_[r1_[n_]] << std::endl; - } -#endif +#else /* !YYDEBUG */ - if (len_) - { - Slice< LocationType, LocationStack > slice (location_stack_, len_); - YYLLOC_DEFAULT (yyloc, slice, len_); - } +# define YY_SYMBOL_PRINT(Title, Type, Value, Location) +# define YY_REDUCE_PRINT(Rule) +# define YY_STACK_PRINT() - switch (n_) - { - ]b4_actions[ - } - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ +#endif /* !YYDEBUG */ - state_stack_.pop (len_); - semantic_stack_.pop (len_); - location_stack_.pop (len_); +#define YYACCEPT goto yyacceptlab +#define YYABORT goto yyabortlab +#define YYERROR goto yyerrorlab -#if YYDEBUG - if (debug_) - { - YYCDEBUG << "state stack now"; - for (StateStack::ConstIterator i = state_stack_.begin (); - i != state_stack_.end (); ++i) - YYCDEBUG << ' ' << *i; - YYCDEBUG << std::endl; - } -#endif +#if YYERROR_VERBOSE - semantic_stack_.push (yyval); - location_stack_.push (yyloc); - - /* Shift the result of the reduction. */ - n_ = r1_[n_]; - state_ = pgoto_[n_ - ntokens_] + state_stack_[0]; - if (0 <= state_ && state_ <= last_ && check_[state_] == state_stack_[0]) - state_ = table_[state_]; - else - state_ = defgoto_[n_ - ntokens_]; - goto yynewstate; - - /* Report and recover from errors. This is very incomplete. */ - yyerrlab: - /* If not already recovering from an error, report this error. */ - if (!errstatus) +/* 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 +yy::]b4_parser_class_name[::yytnamerr_ (const char *yystr) +{ + if (*yystr == '"') { - ++nerrs; + std::string yyr = ""; + char const *yyp = yystr; -#if YYERROR_VERBOSE - n_ = pact_[state_]; - if (pact_ninf_ < n_ && n_ < last_) - { - message = "syntax error, unexpected "; - message += name_[ilooka_]; + for (;;) + switch (*++yyp) { - int count = 0; - for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x) - if (check_[x + n_] == x && x != terror_) - ++count; - if (count < 5) - { - count = 0; - for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x) - if (check_[x + n_] == x && x != terror_) - { - message += (!count++) ? ", expecting " : " or "; - message += name_[x]; - } - } + case '\'': + case ',': + goto do_not_strip_quotes; + + case '\\': + if (*++yyp != '\\') + goto do_not_strip_quotes; + /* Fall through. */ + default: + yyr += *yyp; + break; + + case '"': + return yyr; } - } - else -#endif - message = "syntax error"; - error_ (); + do_not_strip_quotes: ; } - goto yyerrlab1; - /* Error raised explicitly by an action. */ - yyerrlab1: - if (errstatus == 3) - { - /* If just tried and failed to reuse lookahead token after an - error, discard it. */ - - /* Return failure if at end of input. */ - if (looka_ == eof_) - goto yyabortlab; - YYCDEBUG << "Discarding token " << looka_ - << " (" << name_[ilooka_] << ")." << std::endl; - looka_ = empty_; - } + return yystr; +} - /* Else will try to reuse lookahead token after shifting the error - token. */ +#endif - errstatus = 3; +namespace yy +{ + /// Build a parser object. + ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[) + : yydebug_ (false), + yycdebug_ (&std::cerr)]b4_parse_param_cons[ + { + } - for (;;) - { - n_ = pact_[state_]; - if (n_ != pact_ninf_) - { - n_ += terror_; - if (0 <= n_ && n_ <= last_ && check_[n_] == terror_) - { - n_ = table_[n_]; - if (0 < n_) - break; - } - } - - /* Pop the current state because it cannot handle the error token. */ - if (!state_stack_.height ()) - goto yyabortlab; + ]b4_parser_class_name::~b4_parser_class_name[ () + { + } #if YYDEBUG - if (debug_) - { - if (stos_[state_] < ntokens_) - { - YYCDEBUG << "Error: popping token " - << token_number_[stos_[state_]] - << " (" << name_[stos_[state_]]; -# ifdef YYPRINT - YYPRINT (stderr, token_number_[stos_[state_]], - semantic_stack_.top ()); -# endif - YYCDEBUG << ')' << std::endl; - } - else - { - YYCDEBUG << "Error: popping nonterminal (" - << name_[stos_[state_]] << ')' << std::endl; - } - } -#endif + /*--------------------------------. + | Print this symbol on YYOUTPUT. | + `--------------------------------*/ - state_ = (state_stack_.pop (), state_stack_[0]); - semantic_stack_.pop (); - location_stack_.pop ();; + void + ]b4_parser_class_name[::yysymprint_ (int yytype, + const semantic_type* yyvaluep, const location_type* yylocationp) + { + /* Backward compatibility, but should be removed eventually. */ + std::ostream& cdebug_ = *yycdebug_; + + YYUSE (!&cdebug_); + YYUSE (yylocationp); + YYUSE (yyvaluep); + + *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yytname_[yytype] << " (" + << *yylocationp << ": "; + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl +[ default: + break; + } + *yycdebug_ << ')'; + } +#endif /* ! YYDEBUG */ + + void + ]b4_parser_class_name[::yydestruct_ (const char* yymsg, + int yytype, semantic_type* yyvaluep, location_type* yylocationp) + { + YYUSE (yylocationp); + YYUSE (yymsg); + YYUSE (yyvaluep); + + YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); + + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ + default: + break; + } + } + + void + ]b4_parser_class_name[::yypop_ (unsigned int n) + { + yystate_stack_.pop (n); + yysemantic_stack_.pop (n); + yylocation_stack_.pop (n); + } -#if YYDEBUG - if (debug_) - { - YYCDEBUG << "Error: state stack now"; - for (StateStack::ConstIterator i = state_stack_.begin (); - i != state_stack_.end (); ++i) - YYCDEBUG << ' ' << *i; - YYCDEBUG << std::endl; - } -#endif - } + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } - if (n_ == final_) - goto yyacceptlab; + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } - YYCDEBUG << "Shifting error token, "; - semantic_stack_.push (value); - location_stack_.push (location); + ]b4_parser_class_name[::debug_level_type + ]b4_parser_class_name[::debug_level () const + { + return yydebug_; + } - state_ = n_; - goto yynewstate; + void + ]b4_parser_class_name[::set_debug_level (debug_level_type l) + { + yydebug_ = l; + } - /* Accept. */ - yyacceptlab: - return 0; - /* Abort. */ - yyabortlab: - return 1; -} + int + ]b4_parser_class_name[::parse () + { + /// Look-ahead and look-ahead in internal form. + int yychar = yyempty_; + int yytoken = 0; -void -yy::]b4_parser_class_name[::lex_ () -{ -#if YYLSP_NEEDED - looka_ = yylex (&value, &location); -#else - looka_ = yylex (&value); + /* State. */ + int yyn; + int yylen; + int yystate = 0; + + /* Error handling. */ + int yynerrs_ = 0; + int yyerrstatus_ = 0; + + /// Semantic value of the look-ahead. + semantic_type yylval; + /// Location of the look-ahead. + location_type yylloc; + /// The locations where the error started and ended. + location yyerror_range[2]; + + /// $$. + semantic_type yyval; + /// @@$. + location_type yyloc; + + int yyresult; + + YYCDEBUG << "Starting parse" << std::endl; + +]m4_ifdef([b4_initial_action], [ +m4_pushdef([b4_at_dollar], [yylloc])dnl +m4_pushdef([b4_dollar_dollar], [yylval])dnl + /* User initialization code. */ + b4_initial_action +m4_popdef([b4_dollar_dollar])dnl +m4_popdef([b4_at_dollar])dnl + /* Line __line__ of yacc.c. */ +b4_syncline([@oline@], [@ofile@])])dnl + + [ /* Initialize the stacks. The initial state will be pushed in + yynewstate, since the latter expects the semantical and the + location values to have been already stored, initialize these + stacks with a primary value. */ + yystate_stack_ = state_stack_type (0); + yysemantic_stack_ = semantic_stack_type (0); + yylocation_stack_ = location_stack_type (0); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yylloc); + + /* New state. */ + yynewstate: + yystate_stack_.push (yystate); + YYCDEBUG << "Entering state " << yystate << std::endl; + goto yybackup; + + /* Backup. */ + yybackup: + + /* Try to take a decision without look-ahead. */ + yyn = yypact_[yystate]; + if (yyn == yypact_ninf_) + goto yydefault; + + /* Read a look-ahead token. */ + if (yychar == yyempty_) + { + YYCDEBUG << "Reading a token: "; + yychar = ]b4_c_function_call([yylex], [int], + [[YYSTYPE*], [&yylval]][]dnl +b4_location_if([, [[location*], [&yylloc]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; + } + + + /* Convert token to internal form. */ + if (yychar <= yyeof_) + { + yychar = yytoken = yyeof_; + YYCDEBUG << "Now at end of input." << std::endl; + } + else + { + yytoken = yytranslate_ (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &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) + goto yydefault; + + /* Reduce or error. */ + yyn = yytable_[yyn]; + if (yyn <= 0) + { + if (yyn == 0 || yyn == yytable_ninf_) + goto yyerrlab; + yyn = -yyn; + goto yyreduce; + } + + /* Accept? */ + if (yyn == yyfinal_) + goto yyacceptlab; + + /* Shift the look-ahead token. */ + YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); + + /* Discard the token being shifted unless it is eof. */ + if (yychar != yyeof_) + yychar = yyempty_; + + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yylloc); + + /* Count tokens shifted since error; after three, turn off error + status. */ + if (yyerrstatus_) + --yyerrstatus_; + + yystate = yyn; + goto yynewstate; + + /*-----------------------------------------------------------. + | yydefault -- do the default action for the current state. | + `-----------------------------------------------------------*/ + yydefault: + yyn = yydefact_[yystate]; + if (yyn == 0) + goto yyerrlab; + goto yyreduce; + + /*-----------------------------. + | yyreduce -- Do a reduction. | + `-----------------------------*/ + yyreduce: + yylen = yyr2_[yyn]; + /* If LEN_ 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) + yyval = yysemantic_stack_[yylen - 1]; + else + yyval = yysemantic_stack_[0]; + + { + slice slice (yylocation_stack_, yylen); + YYLLOC_DEFAULT (yyloc, slice, yylen); + } + YY_REDUCE_PRINT (yyn); + switch (yyn) + { + ]b4_actions[ + default: break; + } + YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc); + /* Line __line__ of lalr1.cc. */ +]b4_syncline([@oline@], [@ofile@])[ + + yypop_ (yylen); + + YY_STACK_PRINT (); + + yysemantic_stack_.push (yyval); + yylocation_stack_.push (yyloc); + + /* Shift the result of the reduction. */ + yyn = yyr1_[yyn]; + yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0]; + if (0 <= yystate && yystate <= yylast_ + && yycheck_[yystate] == yystate_stack_[0]) + yystate = yytable_[yystate]; + else + yystate = yydefgoto_[yyn - yyntokens_]; + goto yynewstate; + + /*------------------------------------. + | yyerrlab -- here on detecting error | + `------------------------------------*/ + yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus_) + { + ++yynerrs_; + error (yylloc, yysyntax_error_ (yystate]dnl +b4_error_verbose_if([, yytoken])[)); + } + + yyerror_range[0] = yylloc; + if (yyerrstatus_ == 3) + { + /* If just tried and failed to reuse look-ahead token after an + error, discard it. */ + + if (yychar <= yyeof_) + { + /* Return failure if at end of input. */ + if (yychar == yyeof_) + YYABORT; + } + else + { + yydestruct_ ("Error: discarding", yytoken, &yylval, &yylloc); + yychar = yyempty_; + } + } + + /* Else will try to reuse look-ahead 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[0] = yylocation_stack_[yylen - 1]; + yypop_ (yylen); + yystate = yystate_stack_[0]; + goto yyerrlab1; + + /*-------------------------------------------------------------. + | yyerrlab1 -- common code for both syntax error and YYERROR. | + `-------------------------------------------------------------*/ + 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 (yystate_stack_.height () == 1) + YYABORT; + + yyerror_range[0] = yylocation_stack_[0]; + yydestruct_ ("Error: popping", + yystos_[yystate], + &yysemantic_stack_[0], &yylocation_stack_[0]); + yypop_ (); + yystate = yystate_stack_[0]; + YY_STACK_PRINT (); + } + + if (yyn == yyfinal_) + goto yyacceptlab; + + yyerror_range[1] = yylloc; + // Using YYLLOC is tempting, but would change the location of + // the look-ahead. YYLOC is available though. + YYLLOC_DEFAULT (yyloc, yyerror_range - 1, 2); + yysemantic_stack_.push (yylval); + yylocation_stack_.push (yyloc); + + /* Shift the error token. */ + YY_SYMBOL_PRINT ("Shifting", yystos_[yyn], + &yysemantic_stack_[0], &yylocation_stack_[0]); + + yystate = yyn; + goto yynewstate; + + /* Accept. */ + yyacceptlab: + yyresult = 0; + goto yyreturn; + + /* Abort. */ + yyabortlab: + yyresult = 1; + goto yyreturn; + + yyreturn: + if (yychar != yyeof_ && yychar != yyempty_) + yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc); + + while (yystate_stack_.height () != 1) + { + yydestruct_ ("Cleanup: popping", + yystos_[yystate_stack_[0]], + &yysemantic_stack_[0], + &yylocation_stack_[0]); + yypop_ (); + } + + return yyresult; + } + + // Generate an error message. + std::string + ]b4_parser_class_name[::yysyntax_error_ (int yystate]dnl +b4_error_verbose_if([, int tok])[) + { + std::string res; +#if YYERROR_VERBOSE + int yyn = yypact_[yystate]; + if (yypact_ninf_ < yyn && yyn < yylast_) + { + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. */ + int yyxbegin = yyn < 0 ? -yyn : 0; + + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = yylast_ - yyn; + 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. It should work like yacc.c does it. + // That is, first build a string that looks like this: + // "syntax error, unexpected %s or %s or %s" + // Then, invoke YY_ on this string. + // Finally, use the string as a format to output + // yytname_[tok], etc. + // Until this gets fixed, this message appears in English only. + res = "syntax error, unexpected "; + res += yytnamerr_ (yytname_[tok]); + if (count < 5) + { + count = 0; + for (int x = yyxbegin; x < yyxend; ++x) + if (yycheck_[x + yyn] == x && x != yyterror_) + { + res += (!count++) ? ", expecting " : " or "; + res += yytnamerr_ (yytname_[x]); + } + } + } + else #endif -} + res = YY_("syntax error"); + return res; + } -/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing - STATE-NUM. */ -const ]b4_int_type_for([b4_pact]) yy::b4_parser_class_name::pact_ninf_ = b4_pact_ninf[; -const ]b4_int_type_for([b4_pact])[ -yy::]b4_parser_class_name[::pact_[] = -{ - ]b4_pact[ -}; - -/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE - doesn't specify something else to do. Zero means the default is an - error. */ -const ]b4_int_type_for([b4_defact])[ -yy::]b4_parser_class_name[::defact_[] = -{ - ]b4_defact[ -}; -/* YYPGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_pgoto])[ -yy::]b4_parser_class_name[::pgoto_[] = -{ - ]b4_pgoto[ -}; + /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing + STATE-NUM. */ + const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; + const ]b4_int_type_for([b4_pact])[ + ]b4_parser_class_name[::yypact_[] = + { + ]b4_pact[ + }; -/* YYDEFGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_defgoto])[ -yy::]b4_parser_class_name[::defgoto_[] = -{ - ]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. */ -const ]b4_int_type_for([b4_table]) yy::b4_parser_class_name::table_ninf_ = b4_table_ninf[; -const ]b4_int_type_for([b4_table])[ -yy::]b4_parser_class_name[::table_[] = -{ - ]b4_table[ -}; + /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE + doesn't specify something else to do. Zero means the default is an + error. */ + const ]b4_int_type_for([b4_defact])[ + ]b4_parser_class_name[::yydefact_[] = + { + ]b4_defact[ + }; -/* YYCHECK. */ -const ]b4_int_type_for([b4_check])[ -yy::]b4_parser_class_name[::check_[] = -{ - ]b4_check[ -}; + /* YYPGOTO[NTERM-NUM]. */ + const ]b4_int_type_for([b4_pgoto])[ + ]b4_parser_class_name[::yypgoto_[] = + { + ]b4_pgoto[ + }; -#if YYDEBUG -/* STOS_[STATE-NUM] -- The (internal number of the) accessing - symbol of state STATE-NUM. */ -const ]b4_int_type_for([b4_stos])[ -yy::]b4_parser_class_name[::stos_[] = -{ - ]b4_stos[ -}; + /* YYDEFGOTO[NTERM-NUM]. */ + const ]b4_int_type_for([b4_defgoto])[ + ]b4_parser_class_name[::yydefgoto_[] = + { + ]b4_defgoto[ + }; -/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal token number corresponding - to YYLEX-NUM. */ -const ]b4_int_type_for([b4_toknum])[ -yy::]b4_parser_class_name[::token_number_[] = -{ - ]b4_toknum[ -}; -#endif + /* 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. */ + const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; + const ]b4_int_type_for([b4_table])[ + ]b4_parser_class_name[::yytable_[] = + { + ]b4_table[ + }; -/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ -const ]b4_int_type_for([b4_r1])[ -yy::]b4_parser_class_name[::r1_[] = -{ - ]b4_r1[ -}; + /* YYCHECK. */ + const ]b4_int_type_for([b4_check])[ + ]b4_parser_class_name[::yycheck_[] = + { + ]b4_check[ + }; -/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ -const ]b4_int_type_for([b4_r2])[ -yy::]b4_parser_class_name[::r2_[] = -{ - ]b4_r2[ -}; - -#if YYDEBUG || YYERROR_VERBOSE -/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at YYNTOKENS, nonterminals. */ -const char* -const yy::]b4_parser_class_name[::name_[] = -{ - ]b4_tname[ -}; -#endif + /* STOS_[STATE-NUM] -- The (internal number of the) accessing + symbol of state STATE-NUM. */ + const ]b4_int_type_for([b4_stos])[ + ]b4_parser_class_name[::yystos_[] = + { + ]b4_stos[ + }; #if YYDEBUG -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ -const yy::]b4_parser_class_name[::RhsNumberType -yy::]b4_parser_class_name[::rhs_[] = -{ - ]b4_rhs[ -}; + /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding + to YYLEX-NUM. */ + const ]b4_int_type_for([b4_toknum])[ + ]b4_parser_class_name[::yytoken_number_[] = + { + ]b4_toknum[ + }; +#endif -/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in - YYRHS. */ -const ]b4_int_type_for([b4_prhs])[ -yy::]b4_parser_class_name[::prhs_[] = -{ - ]b4_prhs[ -}; + /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ + const ]b4_int_type_for([b4_r1])[ + ]b4_parser_class_name[::yyr1_[] = + { + ]b4_r1[ + }; -/* YYRLINE[YYN] -- source line where rule number YYN was defined. */ -const ]b4_int_type_for([b4_rline])[ -yy::]b4_parser_class_name[::rline_[] = -{ - ]b4_rline[ -}; + /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ + const ]b4_int_type_for([b4_r2])[ + ]b4_parser_class_name[::yyr2_[] = + { + ]b4_r2[ + }; + +#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE + /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. + First, the terminals, then, starting at \a yyntokens_, nonterminals. */ + const char* + const ]b4_parser_class_name[::yytname_[] = + { + ]b4_tname[ + }; #endif -/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ -yy::]b4_parser_class_name[::TokenNumberType -yy::]b4_parser_class_name[::translate_ (int token) -{ - static - const TokenNumberType - translate_[] = +#if YYDEBUG + /* YYRHS -- A `-1'-separated list of the rules' RHS. */ + const ]b4_parser_class_name[::rhs_number_type + ]b4_parser_class_name[::yyrhs_[] = { - ]b4_translate[ + ]b4_rhs[ + }; + + /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in + YYRHS. */ + const ]b4_int_type_for([b4_prhs])[ + ]b4_parser_class_name[::yyprhs_[] = + { + ]b4_prhs[ }; - if ((unsigned) token <= user_token_number_max_) - return translate_[token]; - else - return undef_token_; -} -const int yy::]b4_parser_class_name[::eof_ = 0; -const int yy::]b4_parser_class_name[::last_ = ]b4_last[; -const int yy::]b4_parser_class_name[::nnts_ = ]b4_nterms_number[; -const int yy::]b4_parser_class_name[::empty_ = -2; -const int yy::]b4_parser_class_name[::final_ = ]b4_final_state_number[; -const int yy::]b4_parser_class_name[::terror_ = 1; -const int yy::]b4_parser_class_name[::errcode_ = 256; -const int yy::]b4_parser_class_name[::ntokens_ = ]b4_tokens_number[; -const int yy::]b4_parser_class_name[::initdepth_ = ]b4_stack_depth_init[; + /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ + const ]b4_int_type_for([b4_rline])[ + ]b4_parser_class_name[::yyrline_[] = + { + ]b4_rline[ + }; -const unsigned yy::]b4_parser_class_name[::user_token_number_max_ = ]b4_user_token_number_max[; -const yy::]b4_parser_class_name[::TokenNumberType yy::]b4_parser_class_name[::undef_token_ = ]b4_undef_token_number[; + // Print the state stack on the debug stream. + void + ]b4_parser_class_name[::yystack_print_ () + { + *yycdebug_ << "Stack now"; + for (state_stack_type::const_iterator i = yystate_stack_.begin (); + i != yystate_stack_.end (); ++i) + *yycdebug_ << ' ' << *i; + *yycdebug_ << std::endl; + } + + // Report on the debug stream that the rule \a yyrule is going to be reduced. + void + ]b4_parser_class_name[::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 << "), "; + /* 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_rhs_location(yynrhs, yyi + 1)[); + } +#endif // YYDEBUG + + /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ + ]b4_parser_class_name[::token_number_type + ]b4_parser_class_name[::yytranslate_ (int token) + { + static + const token_number_type + translate_table[] = + { + ]b4_translate[ + }; + if ((unsigned int) token <= yyuser_token_number_max_) + return translate_table[token]; + else + return yyundef_token_; + } + + const int ]b4_parser_class_name[::yyeof_ = 0; + const int ]b4_parser_class_name[::yylast_ = ]b4_last[; + const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; + const int ]b4_parser_class_name[::yyempty_ = -2; + const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; + const int ]b4_parser_class_name[::yyterror_ = 1; + const int ]b4_parser_class_name[::yyerrcode_ = 256; + const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[; + + const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; + const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; + +} // namespace yy ]b4_epilogue dnl -@output stack.hh -b4_copyright([2002])[ +@output b4_dir_prefix[]stack.hh +b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[ #ifndef BISON_STACK_HH # define BISON_STACK_HH @@ -774,34 +1046,35 @@ b4_copyright([2002])[ namespace yy { - template < class T, class S = std::deque< T > > - class Stack + template > + class stack { public: - typedef typename S::iterator Iterator; - typedef typename S::const_iterator ConstIterator; + // Hide our reversed order. + typedef typename S::reverse_iterator iterator; + typedef typename S::const_reverse_iterator const_iterator; - Stack () : seq_ () + stack () : seq_ () { } - Stack (unsigned n) : seq_ (n) + stack (unsigned int n) : seq_ (n) { } inline T& - operator [] (unsigned index) + operator [] (unsigned int i) { - return seq_[index]; + return seq_[i]; } inline const T& - operator [] (unsigned index) const + operator [] (unsigned int i) const { - return seq_[index]; + return seq_[i]; } inline @@ -813,73 +1086,52 @@ namespace yy inline void - pop (unsigned n = 1) + pop (unsigned int n = 1) { for (; n; --n) seq_.pop_front (); } inline - unsigned + unsigned int height () const { return seq_.size (); } - inline ConstIterator begin () const { return seq_.begin (); } - inline ConstIterator end () const { return seq_.end (); } + inline const_iterator begin () const { return seq_.rbegin (); } + inline const_iterator end () const { return seq_.rend (); } private: S seq_; }; - template < class T, class S = Stack< T > > - class Slice + /// Present a slice of the top of a stack. + template > + class slice { public: - Slice (const S& stack, - unsigned range) : stack_ (stack), - range_ (range) + slice (const S& stack, + unsigned int range) : stack_ (stack), + range_ (range) { } inline const T& - operator [] (unsigned index) const + operator [] (unsigned int i) const { - return stack_[range_ - index]; + return stack_[range_ - i]; } private: const S& stack_; - unsigned range_; + unsigned int range_; }; } #endif // not BISON_STACK_HH] -dnl -@output location.hh -b4_copyright([2002])[ - -#ifndef BISON_LOCATION_HH -# define BISON_LOCATION_HH - -namespace yy -{ - struct Position - { - int line; - int column; - }; - - struct Location - { - Position first; - Position last; - }; -} - -#endif // not BISON_LOCATION_HH] +m4_divert(-1)