X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/2e8cf949a5d7ba3052a4947d207d1edb8306d1e9..77a1a208a9ff9110f28a958c3fb630b434976e1a:/data/lalr1.cc?ds=sidebyside diff --git a/data/lalr1.cc b/data/lalr1.cc index 82a85c27..75eaf571 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,167 +1,173 @@ -m4_divert(-1) - # C++ skeleton for Bison -# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. +# Copyright (C) 2002-2012 Free Software Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or +# 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, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301 USA +# along with this program. If not, see . m4_include(b4_pkgdatadir/[c++.m4]) -# We do want M4 expansion after # for CPP macros. -m4_changecom() -m4_divert(0)dnl -m4_if(b4_defines_flag, 0, [], -[@output @output_header_name@ -b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [2002, 2003, 2004, 2005])[ -/* FIXME: This is wrong, we want computed header guards. - I don't know why the macros are missing now. :( */ -#ifndef PARSER_HEADER_H -# define PARSER_HEADER_H - -#include -#include - -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ - -namespace yy -{ - class position; - class location; -} - -]b4_token_enums(b4_tokens)[ - -/* Copy the first part of user declarations. */ -]b4_pre_prologue[ - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ - -#include "stack.hh" -#include "location.hh" - -/* Enabling traces. */ -#ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ -#endif -/* Enabling verbose error messages. */ -#ifdef YYERROR_VERBOSE -# undef YYERROR_VERBOSE -# define YYERROR_VERBOSE 1 -#else -# define YYERROR_VERBOSE ]b4_error_verbose[ -#endif +# b4_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT) +# -------------------------------------------------------------- +# Declare "parser::yy_" which contents is CONTENT. +m4_define([b4_integral_parser_table_declare], +[m4_ifval([$3], [b4_comment([$3], [ ]) +])dnl + static const b4_int_type_for([$2]) yy$1_[[]];dnl +]) + +# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT) +# ------------------------------------------------------------- +# Define "parser::yy_" which contents is CONTENT. +m4_define([b4_integral_parser_table_define], +[ const b4_int_type_for([$2]) + b4_parser_class_name::yy$1_[[]] = + { + $2 + };dnl +]) + + +# b4_symbol_value_template(VAL, [TYPE]) +# ------------------------------------- +# Same as b4_symbol_value, but used in a template method. It makes +# a difference when using variants. +m4_copy([b4_symbol_value], [b4_symbol_value_template]) + + +# b4_lhs_value([TYPE]) +# -------------------- +# Expansion of $$. +m4_define([b4_lhs_value], + [b4_symbol_value([yylhs.value], [$1])]) + + +# b4_lhs_location() +# ----------------- +# Expansion of @$. +m4_define([b4_lhs_location], + [yylhs.location]) + + +# b4_rhs_data(RULE-LENGTH, NUM) +# ----------------------------- +# Return the data corresponding to the symbol #NUM, where the current +# rule has RULE-LENGTH symbols on RHS. +m4_define([b4_rhs_data], + [yystack_@{b4_subtract($@)@}]) + + +# b4_rhs_state(RULE-LENGTH, NUM) +# ------------------------------ +# The state corresponding to the symbol #NUM, where the current +# rule has RULE-LENGTH symbols on RHS. +m4_define([b4_rhs_state], + [b4_rhs_data([$1], [$2]).state]) + + +# 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], + [b4_symbol_value([b4_rhs_data([$1], [$2]).value], [$3])]) + + +# b4_rhs_location(RULE-LENGTH, NUM) +# --------------------------------- +# Expansion of @NUM, where the current rule has RULE-LENGTH symbols +# on RHS. +m4_define([b4_rhs_location], + [b4_rhs_data([$1], [$2]).location]) + + +# b4_symbol_action(SYMBOL-NUM, KIND) +# ---------------------------------- +# Run the action KIND (destructor or printer) for SYMBOL-NUM. +# Same as in C, but using references instead of pointers. +m4_define([b4_symbol_action], +[b4_symbol_if([$1], [has_$2], +[m4_pushdef([b4_symbol_value], m4_defn([b4_symbol_value_template]))[]dnl +b4_dollar_pushdef([yysym.value], + b4_symbol_if([$1], [has_type], + [m4_dquote(b4_symbol([$1], [type]))]), + [yysym.location])dnl + b4_symbol_case_([$1]) +b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"]) + b4_symbol([$1], [$2]) +b4_syncline([@oline@], [@ofile@]) + break; -#if YYERROR_VERBOSE -# define YYERROR_VERBOSE_IF(x) x -#else -# define YYERROR_VERBOSE_IF(x) /* empty */ -#endif +m4_popdef([b4_symbol_value])[]dnl +b4_dollar_popdef[]dnl +])]) -/* Enabling the token table. */ -#ifndef YYTOKEN_TABLE -# define YYTOKEN_TABLE ]b4_token_table[ -#endif -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_file_name]) -union YYSTYPE b4_stype; -/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])], -[typedef int YYSTYPE;])[ -# define yystype YYSTYPE /* obsolescent; will be withdrawn */ -# define YYSTYPE_IS_DECLARED 1 -# define YYSTYPE_IS_TRIVIAL 1 -#endif +m4_pushdef([b4_copyright_years], + [2002-2012]) -/* Copy the second part of user declarations. */ -]b4_post_prologue[ - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ -/* 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 = (Rhs)[1].begin; \ - (Current).end = (Rhs)[N].end; \ - } \ - else \ - { \ - (Current).begin = (Current).end = (Rhs)[0].end; \ - } \ -} while (0) -#endif +m4_define([b4_parser_class_name], + [b4_percent_define_get([[parser_class_name]])]) -namespace yy -{ - class ]b4_parser_class_name[; +b4_locations_if([b4_percent_define_ifdef([[location_type]], [], + [# Backward compatibility. + m4_define([b4_location_constructors]) + m4_include(b4_pkgdatadir/[location.cc])])]) +m4_include(b4_pkgdatadir/[stack.hh]) +b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])]) - template - struct traits - { - }; +# b4_shared_declarations +# ---------------------- +# Declaration that might either go into the header (if --defines) +# or open coded in the parser body. +m4_define([b4_shared_declarations], +[b4_percent_code_get([[requires]])[ +]b4_parse_assert_if([# include ])[ +# include +# include +# include +# include ]b4_defines_if([[ +# include "stack.hh" +]b4_locations_if([b4_percent_define_ifdef([[location_type]], [], + [[# include "location.hh"]])])])[ - template <> - struct traits<]b4_parser_class_name[> - { - typedef ]b4_int_type_for([b4_translate])[ token_number_type; - typedef ]b4_int_type_for([b4_rhs])[ rhs_number_type; - typedef int state_type; - typedef YYSTYPE semantic_type; - typedef ]b4_location_type[ location_type; - }; -} +]b4_YYDEBUG_define[ + +]b4_namespace_open[ + +]b4_defines_if([], +[b4_stack_define +b4_locations_if([b4_percent_define_ifdef([[location_type]], [], + [b4_position_define +b4_location_define])])])[ + +]b4_variant_if([b4_variant_define])[ -namespace yy -{ /// A Bison parser. class ]b4_parser_class_name[ { - /// Symbol semantic values. - typedef traits<]b4_parser_class_name[>::semantic_type semantic_type; - /// Symbol locations. - typedef traits<]b4_parser_class_name[>::location_type location_type; - public: +]b4_public_types_declare[ /// Build a parser object. - ]b4_parser_class_name[ (]b4_parse_param_decl[) : - yydebug_ (false), - yycdebug_ (&std::cerr)]b4_parse_param_cons[ - { - } - - virtual ~]b4_parser_class_name[ () - { - } + ]b4_parser_class_name[ (]b4_parse_param_decl[); + virtual ~]b4_parser_class_name[ (); /// Parse. /// \returns 0 iff parsing succeeded. virtual int parse (); +#if ]b4_api_PREFIX[DEBUG /// The current debugging stream. std::ostream& debug_stream () const; /// Set the current debugging stream. @@ -173,1191 +179,946 @@ namespace yy debug_level_type debug_level () const; /// Set the current debugging level. void set_debug_level (debug_level_type l); +#endif - private: - /// Report a syntax error. - /// \param loc where the syntax error is found. + /// Report a syntax error.]b4_locations_if([[ + /// \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); + virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg); + + /// Report a syntax error. + void error (const syntax_error& err); + + private: + /// State numbers. + typedef int state_type; /// Generate an error message. - /// \param tok the look-ahead token. - virtual std::string yysyntax_error_ (YYERROR_VERBOSE_IF (int tok)); + /// \param yystate the state where the error occurred. + /// \param yytoken the lookahead token. + virtual std::string yysyntax_error_ (state_type yystate, int yytoken); -#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 */ + /// Compute post-reduction state. + /// \param yystate the current state + /// \param yylhs the nonterminal to push on the stack + state_type yy_lr_goto_state_ (state_type yystate, int yylhs); + /// Whether the given \c yypact_ value indicates a defaulted state. + /// \param yyvalue the value to check + static bool yy_pact_value_is_default_ (int yyvalue); - /// State numbers. - typedef traits<]b4_parser_class_name[>::state_type 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_; + /// Whether the given \c yytable_ value indicates a syntax error. + /// \param yyvalue the value to check + static bool yy_table_value_is_error_ (int yyvalue); /// Internal symbol numbers. - typedef traits<]b4_parser_class_name[>::token_number_type token_number_type; - /* Tables. */ - /// For a state, the index in \a yytable_ of its portion. - static const ]b4_int_type_for([b4_pact])[ yypact_[]; + typedef ]b4_int_type_for([b4_translate])[ token_number_type; 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_[]; + // Tables. +]b4_parser_tables_declare[]b4_error_verbose_if([ - /// 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_[]; + /// Convert the symbol name \a n to a form suitable for a diagnostic. + static std::string yytnamerr_ (const char *n);])[ -#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE +]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[ /// 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 - -#if YYDEBUG - /// A type to store symbol numbers and -1. - typedef traits<]b4_parser_class_name[>::rhs_number_type 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_[]; +]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[ +]b4_integral_parser_table_declare([rline], [b4_rline], + [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[ /// Report on the debug stream that the rule \a r is going to be reduced. - virtual void yyreduce_print_ (int r); + virtual void yy_reduce_print_ (int r); /// Print the state stack on the debug stream. virtual void yystack_print_ (); -#endif - - /// 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 yyeof_; - /* LAST_ -- Last index in TABLE_. */ - 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_; - /* State. */ - int yyn_; - int yylen_; - int yystate_; - - /* Error handling. */ - int yynerrs_; - int yyerrstatus_; - - /* Debugging. */ + // Debugging. int yydebug_; std::ostream* yycdebug_; - -]b4_parse_param_vars[ - }; -} - -#endif /* ! defined PARSER_HEADER_H */] -])dnl -@output @output_parser_name@ -b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [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@])[ - -#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 - -/* A pseudo ostream that takes yydebug_ into account. */ -# define YYCDEBUG \ - for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \ - (*yycdebug_) - -/* Enable debugging if requested. */ -#if YYDEBUG - -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ -do { \ - if (yydebug_) \ - { \ - *yycdebug_ << (Title) << ' '; \ - yysymprint_ ((Type), (Value), (Location)); \ - *yycdebug_ << std::endl; \ - } \ -} while (0) - -# define YY_REDUCE_PRINT(Rule) \ -do { \ - if (yydebug_) \ - yyreduce_print_ (Rule); \ -} while (0) - -# define YY_STACK_PRINT() \ -do { \ - if (yydebug_) \ - yystack_print_ (); \ -} while (0) - -#else /* !YYDEBUG */ - -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) -# define YY_REDUCE_PRINT(Rule) -# define YY_STACK_PRINT() - -#endif /* !YYDEBUG */ - -#define YYACCEPT goto yyacceptlab -#define YYABORT goto yyabortlab -#define YYERROR goto yyerrorlab - -#if YYERROR_VERBOSE - -/* 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 == '"') - { - 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; -} - +#endif // ]b4_api_PREFIX[DEBUG + + /// Convert a scanner token number \a t to a symbol number. + static inline token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t); + +#if ]b4_api_PREFIX[DEBUG + /// \brief Display a symbol type, value and location. + /// \param yyo The output stream. + /// \param yysym The symbol. + template + void yy_print_ (std::ostream& yyo, + const symbol_base_type& yysym) const; #endif -#if YYDEBUG -/*--------------------------------. -| Print this symbol on YYOUTPUT. | -`--------------------------------*/ - -void -yy::]b4_parser_class_name[::yysymprint_ (int yytype, - const semantic_type* yyvaluep, const location_type* yylocationp) -{ - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; - (void) yylocationp; - /* Backward compatibility, but should be removed eventually. */ - std::ostream& cdebug_ = *yycdebug_; - (void) cdebug_; - - *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 -yy::]b4_parser_class_name[::yydestruct_ (const char* yymsg, - int yytype, semantic_type* yyvaluep, location_type* yylocationp) -{ - /* Pacify ``unused variable'' warnings. */ - (void) yymsg; - (void) yyvaluep; - (void) yylocationp; - - YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); - - switch (yytype) - { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ - default: - break; - } -} - -void -yy::]b4_parser_class_name[::yypop_ (unsigned int n) -{ - yystate_stack_.pop (n); - yysemantic_stack_.pop (n); - yylocation_stack_.pop (n); -} - -std::ostream& -yy::]b4_parser_class_name[::debug_stream () const -{ - return *yycdebug_; -} - -void -yy::]b4_parser_class_name[::set_debug_stream (std::ostream& o) -{ - yycdebug_ = &o; -} - - -yy::]b4_parser_class_name[::debug_level_type -yy::]b4_parser_class_name[::debug_level () const -{ - return yydebug_; -} - -void -yy::]b4_parser_class_name[::set_debug_level (debug_level_type l) -{ - yydebug_ = l; -} - - -int -yy::]b4_parser_class_name[::parse () -{ - /// Look-ahead and look-ahead in internal form. - int yychar; - int yytoken; - - /// 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; - - yynerrs_ = 0; - yyerrstatus_ = 0; - - /* Start. */ - yystate_ = 0; - yychar = yyempty_; - -]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))[; - } - + /// \brief Reclaim the memory associated to a symbol. + /// \param yymsg Why this token is reclaimed. + /// If null, print nothing. + /// \param s The symbol. + template + inline void yy_destroy_ (const char* yymsg, + symbol_base_type& yysym) const; - /* Convert token to internal form. */ - if (yychar <= yyeof_) - { - yychar = yytoken = yyeof_; - YYCDEBUG << "Now at end of input." << std::endl; - } - else + private: + /// Element of the stack: a state and its attributes. + struct stack_symbol_type : symbol_base_type { - yytoken = yytranslate_ (yychar); - YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); - } + /// The parent class. + typedef symbol_base_type super_type; - /* If the proper action on seeing token ILOOKA_ is to reduce or to - detect an error, take that action. */ - yyn_ += yytoken; - if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yytoken) - goto yydefault; + /// Default constructor. + inline stack_symbol_type (); - /* Reduce or error. */ - yyn_ = yytable_[yyn_]; - if (yyn_ < 0) - { - if (yyn_ == yytable_ninf_) - goto yyerrlab; - else - { - yyn_ = -yyn_; - goto yyreduce; - } - } - else if (yyn_ == 0) - goto yyerrlab; - - /* 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]; + /// Constructor. + inline stack_symbol_type (]b4_join([state_type s], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[); - { - slice slice (yylocation_stack_, yylen_); - YYLLOC_DEFAULT (yyloc, slice, yylen_); - } - YY_REDUCE_PRINT (yyn_); - switch (yyn_) - { - ]b4_actions[ - default: break; - } + /// The state. + state_type state; -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + /// The type (corresponding to \a state). + inline int type_get_ () const; + }; - yypop_ (yylen_); + /// Stack type. + typedef stack stack_type; - YY_STACK_PRINT (); + /// The stack. + stack_type yystack_; - yysemantic_stack_.push (yyval); - yylocation_stack_.push (yyloc); + /// Push a new state on the stack. + /// \param m a debug message to display + /// if null, no trace is output. + /// \param s the symbol + /// \warning the contents of \a s.value is stolen. + inline void yypush_ (const char* m, stack_symbol_type& s); - /* 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; + /// Push a new look ahead token on the state on the stack. + /// \param m a debug message to display + /// if null, no trace is output. + /// \param s the state + /// \param sym the symbol (for its value and location). + /// \warning the contents of \a s.value is stolen. + inline void yypush_ (const char* m, state_type s, symbol_type& sym); -/*------------------------------------. -| yyerrlab -- here on detecting error | -`------------------------------------*/ -yyerrlab: - /* If not already recovering from an error, report this error. */ - if (!yyerrstatus_) - { - ++yynerrs_; - error (yylloc, yysyntax_error_ (YYERROR_VERBOSE_IF (yytoken))); - } + /// Pop \a n symbols the three stacks. + inline void yypop_ (unsigned int n = 1); - yyerror_range[0] = yylloc; - if (yyerrstatus_ == 3) + /* Constants. */ + enum { - /* If just tried and failed to reuse look-ahead token after an - error, discard it. */ + yyeof_ = 0, + yylast_ = ]b4_last[, //< Last index in yytable_. + yynnts_ = ]b4_nterms_number[, //< Number of nonterminal symbols. + yyempty_ = -2, + yyfinal_ = ]b4_final_state_number[, //< Termination state number. + yyterror_ = 1, + yyerrcode_ = 256, + yyntokens_ = ]b4_tokens_number[ //< Number of tokens. + }; - 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: +]b4_parse_param_vars[ + }; - /* 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; +]b4_lex_symbol_if([b4_yytranslate_define +b4_public_types_define])[ +]b4_namespace_close[ - yyerror_range[0] = yylocation_stack_[yylen_ - 1]; - yypop_ (yylen_); - yystate_ = yystate_stack_[0]; - goto yyerrlab1; +]b4_percent_define_flag_if([[global_tokens_and_yystype]], +[b4_token_defines -/*-------------------------------------------------------------. -| yyerrlab1 -- common code for both syntax error and YYERROR. | -`-------------------------------------------------------------*/ -yyerrlab1: - yyerrstatus_ = 3; /* Each real token shifted decrements this. */ +#ifndef ]b4_api_PREFIX[STYPE + /* Redirection for backward compatibility. */ +# define ]b4_api_PREFIX[STYPE b4_namespace_ref::b4_parser_class_name::semantic_type +#endif +])[ +]b4_percent_code_get([[provides]])[ +]]) - 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 (); - } +# We do want M4 expansion after # for CPP macros. +m4_changecom() +b4_defines_if( +[m4_divert_push(0)dnl +@output(b4_spec_defines_file@)@ +b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++]) +[ +/** + ** \file ]b4_spec_defines_file[ + ** Define the ]b4_namespace_ref[::parser class. + */ - if (yyn_ == yyfinal_) - goto yyacceptlab; +/* C++ LALR(1) parser skeleton written by Akim Demaille. */ - 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); +]b4_cpp_guard_open([b4_spec_defines_file])[ +]b4_shared_declarations[ +]b4_cpp_guard_close([b4_spec_defines_file]) +m4_divert_pop(0)dnl +]) - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_], - &yysemantic_stack_[0], &yylocation_stack_[0]); - yystate_ = yyn_; - goto yynewstate; +m4_divert_push(0)dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++]) +b4_percent_code_get([[top]])[]dnl +m4_if(b4_prefix, [yy], [], +[ +// Take the name prefix into account. +#define yylex b4_prefix[]lex])[ - /* Accept. */ -yyacceptlab: - yyresult_ = 0; - goto yyreturn; +// First part of user declarations. +]b4_user_pre_prologue[ - /* Abort. */ -yyabortlab: - yyresult_ = 1; - goto yyreturn; +]b4_null_define[ -yyreturn: - if (yychar != yyeof_ && yychar != yyempty_) - yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc); +]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]], + [b4_shared_declarations])[ - while (yystate_stack_.height () != 1) - { - yydestruct_ ("Cleanup: popping", - yystos_[yystate_stack_[0]], - &yysemantic_stack_[0], - &yylocation_stack_[0]); - yypop_ (); - } +/* User implementation prologue. */ +]b4_user_post_prologue[ +]b4_percent_code_get[ - return yyresult_; -} - -// Generate an error message. -std::string -yy::]b4_parser_class_name[::yysyntax_error_ (YYERROR_VERBOSE_IF (int tok)) -{ - std::string res; -#if YYERROR_VERBOSE - 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(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; -const ]b4_int_type_for([b4_pact])[ -yy::]b4_parser_class_name[::yypact_[] = -{ - ]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[::yydefact_[] = -{ - ]b4_defact[ -}; - -/* YYPGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_pgoto])[ -yy::]b4_parser_class_name[::yypgoto_[] = -{ - ]b4_pgoto[ -}; - -/* YYDEFGOTO[NTERM-NUM]. */ -const ]b4_int_type_for([b4_defgoto])[ -yy::]b4_parser_class_name[::yydefgoto_[] = -{ - ]b4_defgoto[ -}; - -/* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If - positive, shift that token. If negative, reduce the rule which - number is the opposite. If zero, do what YYDEFACT says. */ -const ]b4_int_type(b4_table_ninf, b4_table_ninf) yy::b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; -const ]b4_int_type_for([b4_table])[ -yy::]b4_parser_class_name[::yytable_[] = -{ - ]b4_table[ -}; - -/* YYCHECK. */ -const ]b4_int_type_for([b4_check])[ -yy::]b4_parser_class_name[::yycheck_[] = -{ - ]b4_check[ -}; - -/* 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[::yystos_[] = -{ - ]b4_stos[ -}; - -#if YYDEBUG -/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding - to YYLEX-NUM. */ -const ]b4_int_type_for([b4_toknum])[ -yy::]b4_parser_class_name[::yytoken_number_[] = -{ - ]b4_toknum[ -}; +#ifndef YY_ +# if defined YYENABLE_NLS && 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 -/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ -const ]b4_int_type_for([b4_r1])[ -yy::]b4_parser_class_name[::yyr1_[] = -{ - ]b4_r1[ -}; - -/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ -const ]b4_int_type_for([b4_r2])[ -yy::]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 yy::]b4_parser_class_name[::yytname_[] = -{ - ]b4_tname[ -}; -#endif +]b4_locations_if([dnl +[#define YYRHSLOC(Rhs, K) ((Rhs)[K].location) +]b4_yylloc_default_define])[ -#if YYDEBUG -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ -const yy::]b4_parser_class_name[::rhs_number_type -yy::]b4_parser_class_name[::yyrhs_[] = -{ - ]b4_rhs[ -}; - -/* 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[::yyprhs_[] = -{ - ]b4_prhs[ -}; - -/* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ -const ]b4_int_type_for([b4_rline])[ -yy::]b4_parser_class_name[::yyrline_[] = -{ - ]b4_rline[ -}; - -// Print the state stack on the debug stream. -void -yy::]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 -yy::]b4_parser_class_name[::yyreduce_print_ (int yyrule) -{ - unsigned int yylno = yyrline_[yyrule]; - /* Print the symbols being reduced, and their result. */ - *yycdebug_ << "Reducing stack by rule " << yyn_ - 1 - << " (line " << yylno << "), "; - for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyn_]; - 0 <= yyrhs_[i]; ++i) - *yycdebug_ << yytname_[yyrhs_[i]] << ' '; - *yycdebug_ << "-> " << yytname_[yyr1_[yyn_]] << std::endl; -} -#endif // YYDEBUG - -/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ -yy::]b4_parser_class_name[::token_number_type -yy::]b4_parser_class_name[::yytranslate_ (int token) -{ - static - const token_number_type - translate_table[] = +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) ((void) (e)) + +/* Enable debugging if requested. */ +#if ]b4_api_PREFIX[DEBUG + +/* 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 /* !]b4_api_PREFIX[DEBUG */ + +# define YYCDEBUG if (false) std::cerr +# define YY_SYMBOL_PRINT(Title, Symbol) YYUSE(Symbol) +# define YY_REDUCE_PRINT(Rule) static_cast(0) +# define YY_STACK_PRINT() static_cast(0) + +#endif /* !]b4_api_PREFIX[DEBUG */ + +#define yyerrok (yyerrstatus_ = 0) +#define yyclearin (yyempty = true) + +#define YYACCEPT goto yyacceptlab +#define YYABORT goto yyabortlab +#define YYERROR goto yyerrorlab +#define YYRECOVERING() (!!yyerrstatus_) + +]b4_namespace_open[]b4_error_verbose_if([[ + + /* 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 + ]b4_parser_class_name[::yytnamerr_ (const char *yystr) { - ]b4_translate[ - }; - if ((unsigned int) token <= yyuser_token_number_max_) - return translate_table[token]; - else - return yyundef_token_; -} - -const int yy::]b4_parser_class_name[::yyeof_ = 0; -const int yy::]b4_parser_class_name[::yylast_ = ]b4_last[; -const int yy::]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; -const int yy::]b4_parser_class_name[::yyempty_ = -2; -const int yy::]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; -const int yy::]b4_parser_class_name[::yyterror_ = 1; -const int yy::]b4_parser_class_name[::yyerrcode_ = 256; -const int yy::]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[; - -const unsigned int yy::]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; -const yy::]b4_parser_class_name[::token_number_type yy::]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; - -]b4_epilogue -dnl -@output stack.hh -b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[ - -#ifndef BISON_STACK_HH -# define BISON_STACK_HH - -#include - -namespace yy -{ - template > - class stack + 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; + } +]])[ + + /// Build a parser object. + ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [ + :])[ +#if ]b4_api_PREFIX[DEBUG + ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false), + yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[ +#endif]b4_parse_param_cons[ { - public: - - // Hide our reversed order. - typedef typename S::reverse_iterator iterator; - typedef typename S::const_reverse_iterator const_iterator; - - stack () : seq_ () - { - } - - stack (unsigned int n) : seq_ (n) - { - } - - inline - T& - operator [] (unsigned int i) - { - return seq_[i]; - } - - inline - const T& - operator [] (unsigned int i) const - { - return seq_[i]; - } - - inline - void - push (const T& t) - { - seq_.push_front (t); - } - - inline - void - pop (unsigned int n = 1) - { - for (; n; --n) - seq_.pop_front (); - } + } - inline - unsigned int - height () const - { - return seq_.size (); - } + ]b4_parser_class_name::~b4_parser_class_name[ () + { + } - inline const_iterator begin () const { return seq_.rbegin (); } - inline const_iterator end () const { return seq_.rend (); } - private: + /*---------------. + | Symbol types. | + `---------------*/ - S seq_; - }; +]b4_lex_symbol_if([], [b4_public_types_define])[ - /// Present a slice of the top of a stack. - template > - class slice + // stack_symbol_type. + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type () + : super_type () + , state () { - public: - - slice (const S& stack, - unsigned int range) : stack_ (stack), - range_ (range) - { - } - - inline - const T& - operator [] (unsigned int i) const - { - return stack_[range_ - i]; - } - - private: + } - const S& stack_; - unsigned int range_; - }; -} + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_join( + [state_type s], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[) + : super_type (v]b4_locations_if([, l])[) + , state (s) + { + } -#endif // not BISON_STACK_HH] -dnl -@output position.hh -b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ + int + ]b4_parser_class_name[::stack_symbol_type::type_get_ () const + { + return yystos_[state]; + } -/** - ** \file position.hh - ** Define the position class. - */ -#ifndef BISON_POSITION_HH -# define BISON_POSITION_HH + template + void + ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, + symbol_base_type& yysym) const + { + if (yymsg) + YY_SYMBOL_PRINT (yymsg, yysym); + + // User destructor. + int yytype = yysym.type_get (); + switch (yytype) + { +]b4_symbol_foreach([b4_symbol_destructor])dnl +[ default: + break; + }]b4_variant_if([ + + // Type destructor. + b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[ + } -# include -# include +#if ]b4_api_PREFIX[DEBUG + template + void + ]b4_parser_class_name[::yy_print_ (std::ostream& yyo, + const symbol_base_type& yysym) const + { + std::ostream& yyoutput = yyo; + YYUSE (yyoutput); + int yytype = yysym.type_get (); + yyo << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yytname_[yytype] << " ("]b4_locations_if([ + << yysym.location << ": "])[; + switch (yytype) + { +]b4_symbol_foreach([b4_symbol_printer])dnl +[ default: + break; + } + yyo << ')'; + } +#endif -namespace yy -{ - /// Abstract a position. - class position + void + ]b4_parser_class_name[::yypush_ (const char* m, state_type s, + symbol_type& sym) { - public: - /// Initial column number. - static const unsigned int initial_column = 0; - /// Initial line number. - static const unsigned int initial_line = 1; + if (m) + YY_SYMBOL_PRINT (m, sym); +]b4_variant_if( +[[ yystack_.push (stack_symbol_type (]b4_join( + [s], + [semantic_type()], + b4_locations_if([sym.location]))[)); + ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]], + [build], [sym.value])], +[[ yystack_.push (stack_symbol_type (]b4_join( + [s], + [sym.value], + b4_locations_if([sym.location]))[));]])[ + } - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a position. - position () : - filename (0), - line (initial_line), - column (initial_column) - { - } - /** \} */ + void + ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s) + { + if (m) + YY_SYMBOL_PRINT (m, s); +]b4_variant_if( +[[ yystack_.push (stack_symbol_type (]b4_join( + [s.state], + [semantic_type()], + b4_locations_if([s.location]))[)); + ]b4_symbol_variant([[yystos_[s.state]]], [[yystack_[0].value]], + [build], [s.value])], +[ yystack_.push (s);])[ + } + void + ]b4_parser_class_name[::yypop_ (unsigned int n) + { + yystack_.pop (n); + } - /** \name Line and Column related manipulators - ** \{ */ - public: - /// (line related) Advance to the COUNT next lines. - inline void lines (int count = 1) - { - column = initial_column; - line += count; - } +#if ]b4_api_PREFIX[DEBUG + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } - /// (column related) Advance to the COUNT next columns. - inline void columns (int count = 1) - { - int leftmost = initial_column; - int current = column; - if (leftmost <= current + count) - column += count; - else - column = initial_column; - } - /** \} */ + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } - public: - /// File name to which this position refers. - ]b4_filename_type[* filename; - /// Current line number. - unsigned int line; - /// Current column number. - unsigned int column; - }; - /// Add and assign a position. - inline const position& - operator+= (position& res, const int width) + ]b4_parser_class_name[::debug_level_type + ]b4_parser_class_name[::debug_level () const { - res.columns (width); - return res; + return yydebug_; } - /// Add two position objects. - inline const position - operator+ (const position& begin, const int width) + void + ]b4_parser_class_name[::set_debug_level (debug_level_type l) { - position res = begin; - return res += width; + yydebug_ = l; } +#endif // ]b4_api_PREFIX[DEBUG - /// Add and assign a position. - inline const position& - operator-= (position& res, const int width) + inline ]b4_parser_class_name[::state_type + ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yylhs) { - return res += -width; + int yyr = yypgoto_[yylhs - yyntokens_] + yystate; + if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate) + return yytable_[yyr]; + else + return yydefgoto_[yylhs - yyntokens_]; } - /// Add two position objects. - inline const position - operator- (const position& begin, const int width) + inline bool + ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue) { - return begin + -width; + return yyvalue == yypact_ninf_; } - /** \brief Intercept output stream redirection. - ** \param ostr the destination output stream - ** \param pos a reference to the position to redirect - */ - inline std::ostream& - operator<< (std::ostream& ostr, const position& pos) + inline bool + ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue) { - if (pos.filename) - ostr << *pos.filename << ':'; - return ostr << pos.line << '.' << pos.column; + return yyvalue == yytable_ninf_; } -} -#endif // not BISON_POSITION_HH] -@output location.hh -b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ + int + ]b4_parser_class_name[::parse () + { + /// Whether yyla contains a lookahead. + bool yyempty = true; -/** - ** \file location.hh - ** Define the location class. - */ + /* State. */ + int yyn; + int yylen = 0; -#ifndef BISON_LOCATION_HH -# define BISON_LOCATION_HH + /* Error handling. */ + int yynerrs_ = 0; + int yyerrstatus_ = 0; -# include -# include -# include "position.hh" + /// The lookahead symbol. + symbol_type yyla;]b4_locations_if([[ -namespace yy -{ + /// The locations where the error started and ended. + stack_symbol_type yyerror_range[3];]])[ - /// Abstract a location. - class location - { - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a location. - location () : - begin (), - end () - { - } - /** \} */ + /// $$ and @@$. + stack_symbol_type yylhs; + /// The return value of parse (). + int yyresult; - /** \name Line and Column related manipulators - ** \{ */ - public: - /// Reset initial location to final location. - inline void step () - { - begin = end; - } + YYCDEBUG << "Starting parse" << std::endl; - /// Extend the current location to the COUNT next columns. - inline void columns (unsigned int count = 1) +]m4_ifdef([b4_initial_action], [ +b4_dollar_pushdef([yyla.value], [], [yyla.location])dnl + /* User initialization code. */ + b4_user_initial_action +b4_dollar_popdef])[]dnl + + [ /* 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_ = stack_type (0); + yypush_ (YY_NULL, 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 (yyempty) + { + YYCDEBUG << "Reading a token: "; + try + { +]b4_lex_symbol_if( +[ yyla = b4_function_call([yylex], [symbol_type], + m4_ifdef([b4_lex_param], b4_lex_param));], +[ yyla.type = yytranslate_ (b4_function_call([yylex], [int], + [b4_api_PREFIX[STYPE*], [&yyla.value]][]dnl +b4_locations_if([, [[location*], [&yyla.location]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ + } + catch (const syntax_error& yyexc) + { + error (yyexc); + goto yyerrlab1; + } + yyempty = false; + } + 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; + if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type) + goto yydefault; + + /* Reduce or error. */ + yyn = yytable_[yyn]; + if (yyn <= 0) + { + if (yy_table_value_is_error_ (yyn)) + goto yyerrlab; + yyn = -yyn; + goto yyreduce; + } + + /* Discard the token being shifted. */ + yyempty = true; + + /* 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]; + yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([ + /* Variants are always initialized to an empty instance of the + correct type. The default $$=$1 action is NOT applied when using + variants. */ + b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[ + /* If YYLEN is nonzero, implement the default value of the action: + `$$ = $1'. Otherwise, use the top of the stack. + + Otherwise, the following line sets YYLHS.VALUE to garbage. + This behavior is undocumented and Bison + users should not rely upon it. */ + if (yylen) + yylhs.value = yystack_@{yylen - 1@}.value; + else + yylhs.value = yystack_@{0@}.value;])[ +]b4_locations_if([dnl +[ + // Compute the default @@$. { - end += count; - } - - /// Extend the current location to the COUNT next lines. - inline void lines (unsigned int count = 1) + slice slice (yystack_, yylen); + YYLLOC_DEFAULT (yylhs.location, slice, yylen); + }]])[ + + // Perform the reduction. + YY_REDUCE_PRINT (yyn); + try + { + switch (yyn) + { +]b4_user_actions[ + default: + break; + } + } + catch (const syntax_error& yyexc) + { + error (yyexc); + YYERROR; + } + YY_SYMBOL_PRINT ("-> $$ =", yylhs); +]b4_variant_if([[ + // Destroy the rhs symbols. + for (int i = 0; i < yylen; ++i) + // Destroy a variant which value may have been swapped with + // yylhs.value (for instance if the action was "std::swap($$, + // $1)"). The value of yylhs.value (hence possibly one of these + // rhs symbols) depends on the default construction for this + // type. In the case of pointers for instance, no + // initialization is done, so the value is junk. Therefore do + // not try to report the value of symbols about to be destroyed + // in the debug trace, it's possibly junk. Hence yymsg = 0. + // Besides, that keeps exactly the same traces as with the other + // Bison skeletons. + yy_destroy_ (YY_NULL, yystack_[i]);]])[ + + yypop_ (yylen); + yylen = 0; + YY_STACK_PRINT (); + + /* Shift the result of the reduction. */ + yypush_ (YY_NULL, yylhs); + goto yynewstate; + + /*--------------------------------------. + | yyerrlab -- here on detecting error. | + `--------------------------------------*/ + yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus_) + { + ++yynerrs_; + error (]b4_join(b4_locations_if([yyla.location]), + [[yysyntax_error_ (yystack_[0].state, + yyempty ? yyempty_ : yyla.type)]])[); + } + +]b4_locations_if([[ + 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 == yyeof_) + YYABORT; + else if (!yyempty) + { + yy_destroy_ ("Error: discarding", yyla); + yyempty = true; + } + } + + /* 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;]b4_locations_if([[ + yyerror_range[1].location = yystack_[yylen - 1].location;]])b4_variant_if([[ + /* $$ was initialized before running the user action. */ + yy_destroy_ ("Error: discarding", yylhs);]])[ + /* Do not reclaim the symbols of the rule which 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. */ { - end.lines (count); - } - /** \} */ - + 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; +]b4_locations_if([[ + yyerror_range[1].location = yystack_[0].location;]])[ + yy_destroy_ ("Error: popping", yystack_[0]); + yypop_ (); + YY_STACK_PRINT (); + } +]b4_locations_if([[ + yyerror_range[2].location = yyla.location; + YYLLOC_DEFAULT (error_token.location, yyerror_range, 2);]])[ - public: - /// Beginning of the located region. - position begin; - /// End of the located region. - position end; - }; + /* 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 (!yyempty) + yy_destroy_ ("Cleanup: discarding lookahead", yyla); + + /* Do not reclaim the symbols of the rule which action triggered + this YYABORT or YYACCEPT. */ + yypop_ (yylen); + while (yystack_.size () != 1) + { + yy_destroy_ ("Cleanup: popping", yystack_[0]); + yypop_ (); + } + + return yyresult; + } - /// Join two location objects to create a location. - inline const location operator+ (const location& begin, const location& end) + void + ]b4_parser_class_name[::error (const syntax_error& yyexc) { - location res = begin; - res.end = end.end; - return res; + error (]b4_join(b4_locations_if([yyexc.location]), + [[yyexc.what()]])[); } - /// Add two location objects. - inline const location operator+ (const location& begin, unsigned int width) - { - location res = begin; - res.columns (width); - return res; + // Generate an error message. + std::string + ]b4_parser_class_name[::yysyntax_error_ (]dnl +b4_error_verbose_if([state_type yystate, int yytoken], + [int, int])[) + {]b4_error_verbose_if([[ + std::string yyres; + // 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 yytoken) 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 (yytoken != yyempty_) + { + 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_NULL; + 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_ + } + + // 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;]], [[ + return YY_("syntax error");]])[ } - /// Add and assign a location. - inline location& operator+= (location& res, unsigned int width) + + const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; + + const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; + +]b4_parser_tables_define[ + +]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[ + /* 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_[] = { - res.columns (width); - return res; - } + ]b4_tname[ + }; + +]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[ +]b4_integral_parser_table_define([rline], [b4_rline])[ - /** \brief Intercept output stream redirection. - ** \param ostr the destination output stream - ** \param loc a reference to the location to redirect - ** - ** Avoid duplicate information. - */ - inline std::ostream& operator<< (std::ostream& ostr, const location& loc) + // Print the state stack on the debug stream. + void + ]b4_parser_class_name[::yystack_print_ () { - position last = loc.end - 1; - ostr << loc.begin; - if (last.filename - && (!loc.begin.filename - || *loc.begin.filename != *last.filename)) - ostr << '-' << last; - else if (loc.begin.line != last.line) - ostr << '-' << last.line << '.' << last.column; - else if (loc.begin.column != last.column) - ostr << '-' << last.column; - return ostr; + *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 + ]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 << "):" << std::endl; + /* The symbols being reduced. */ + for (int yyi = 0; yyi < yynrhs; yyi++) + YY_SYMBOL_PRINT (" $" << yyi + 1 << " =", + ]b4_rhs_data(yynrhs, yyi + 1)[); + } +#endif // ]b4_api_PREFIX[DEBUG -#endif // not BISON_LOCATION_HH] +]b4_lex_symbol_if([], [b4_yytranslate_define])[ +]b4_namespace_close[ +]b4_epilogue[]dnl +m4_divert_pop(0) +m4_popdef([b4_copyright_years])dnl