X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/2e1f5829ee59d4b1d6a6eb92fd6afde3e4dab55b..9b5049bd074ec26af9e216fd95eb8d618e3601a4:/data/lalr1.cc?ds=sidebyside diff --git a/data/lalr1.cc b/data/lalr1.cc index d81ab7a7..deab8639 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,41 +1,79 @@ -m4_divert(-1) # C++ skeleton for Bison -# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# Copyright (C) 2002-2010 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 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., 59 Temple Place, Suite 330, Boston, MA -# 02111-1307 USA +# along with this program. If not, see . -## ---------------- ## -## Default values. ## -## ---------------- ## +m4_include(b4_pkgdatadir/[c++.m4]) -# Default Parser class name. -m4_define_default([b4_parser_class_name], [Parser]) +# 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_c_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 +]) -## ----------------- ## -## Semantic Values. ## -## ----------------- ## +# 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], -[yyval[]m4_ifval([$1], [.$1])]) + [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]) @@ -43,15 +81,7 @@ m4_define([b4_lhs_value], # 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_symbol_value([b4_rhs_data([$1], [$2]).value], [$3])]) # b4_rhs_location(RULE-LENGTH, NUM) @@ -59,177 +89,128 @@ m4_define([b4_lhs_location], # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], -[location_stack_@{m4_eval([$1 - $2])@}]) - - -# b4_parse_param_decl -# ------------------- -# Extra formal arguments of the constructor. -# Change the parameter names from "foo" into "foo_yyarg", so that -# there is no collision bw the user chosen attribute name, and the -# argument name in the constructor. -m4_define([b4_parse_param_decl], -[m4_ifset([b4_parse_param], - [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])]) - -m4_define([b4_parse_param_decl_1], -[$1_yyarg]) - - - -# b4_parse_param_cons -# ------------------- -# Extra initialisations of the constructor. -m4_define([b4_parse_param_cons], - [m4_ifset([b4_parse_param], - [, - b4_cc_constructor_calls(b4_parse_param)])]) -m4_define([b4_cc_constructor_calls], - [m4_map_sep([b4_cc_constructor_call], [, - ], [$@])]) -m4_define([b4_cc_constructor_call], - [$2 ($2_yyarg)]) - -# b4_parse_param_vars -# ------------------- -# Extra instance variables. -m4_define([b4_parse_param_vars], - [m4_ifset([b4_parse_param], - [ - /* User arguments. */ -b4_cc_var_decls(b4_parse_param)])]) -m4_define([b4_cc_var_decls], - [m4_map_sep([b4_cc_var_decl], [ -], [$@])]) -m4_define([b4_cc_var_decl], - [ $1;]) + [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_dollar_dollar], + [b4_symbol_value_template([yysym.value], + b4_symbol_if([$1], [has_type], + [b4_symbol([$1], [type])]))])dnl +m4_pushdef([b4_at_dollar], [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; + +m4_popdef([b4_at_dollar])dnl +m4_popdef([b4_dollar_dollar])dnl +])]) + + +m4_pushdef([b4_copyright_years], + [2002-2010]) + +m4_define([b4_parser_class_name], + [b4_percent_define_get([[parser_class_name]])]) +# The header is mandatory. +b4_defines_if([], + [b4_fatal([b4_skeleton[: using %%defines is mandatory]])]) +b4_locations_if( +[# 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])]) # 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])[ -/* FIXME: This is wrong, we want computed header guards. - I don't know why the macros are missing now. :( */ +m4_divert_push(0)dnl +@output(b4_spec_defines_file@)@ +b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++]) +dnl FIXME: This is wrong, we want computed header guards. +[ +/* C++ LALR(1) parser skeleton written by Akim Demaille. */ + #ifndef PARSER_HEADER_H # define PARSER_HEADER_H -#include "stack.hh" -#include "location.hh" +]b4_percent_code_get([[requires]])[ +]b4_parse_assert_if([#include ])[ +#include #include #include +]b4_locations_if([#include "location.hh"])[ +#include "stack.hh" -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ - -]b4_token_defines(b4_tokens)[ - -/* Copy the first part of user declarations. */ -]b4_pre_prologue[ - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ +]b4_namespace_open[ +]b4_variant_if([b4_variant_define])[ +]b4_namespace_close[ /* Enabling traces. */ #ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ +# define YYDEBUG ]b4_parse_trace_if([1], [0])[ #endif -/* Enabling verbose error message. */ -#ifndef YYERROR_VERBOSE -# define YYERROR_VERBOSE ]b4_error_verbose[ +/* Enabling verbose error messages. */ +#ifdef YYERROR_VERBOSE +# undef YYERROR_VERBOSE +# define YYERROR_VERBOSE 1 +#else +# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[ #endif -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_filename]) -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 +/* Enabling the token table. */ +#ifndef YYTOKEN_TABLE +# define YYTOKEN_TABLE ]b4_token_table[ #endif -/* 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]. +]b4_locations_if([dnl +[/* 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 - -namespace yy -{ - class ]b4_parser_class_name[; - - template - 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 -{ +# define YYLLOC_DEFAULT(Current, Rhs, N) \ +do { \ + if (N) \ + { \ + (Current).begin = (Rhs)[1].location.begin; \ + (Current).end = (Rhs)[N].location.end; \ + } \ + else \ + { \ + (Current).begin = (Current).end = (Rhs)[0].location.end; \ + } \ +} while (false) +#endif]])[ + +]b4_namespace_open[ + + /// A Bison parser. class ]b4_parser_class_name[ { public: +]b4_public_types_declare[ + /// Build a parser object. + ]b4_parser_class_name[ (]b4_parse_param_decl[); + virtual ~]b4_parser_class_name[ (); - 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 StateStack; - typedef Stack SemanticStack; - typedef Stack LocationStack; - - ]b4_parser_class_name[ (]b4_parse_param_decl[) : - yydebug_ (false), - yycdebug_ (&std::cerr)]b4_parse_param_cons[ - { - } - - virtual ~]b4_parser_class_name[ () - { - } - + /// Parse. + /// \returns 0 iff parsing succeeded. virtual int parse (); - /// Return the current debugging stream. +#if YYDEBUG + /// The current debugging stream. std::ostream& debug_stream () const; /// Set the current debugging stream. void set_debug_stream (std::ostream &); @@ -240,1058 +221,876 @@ 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.]b4_locations_if([ + /// \param loc where the syntax error is found.])[ + /// \param msg a description of the syntax error. + virtual void error (]b4_locations_if([const location_type& loc, ])[const std::string& msg); - virtual void yylex_ (); - virtual void error_ (); - virtual void report_syntax_error_ (); -#if YYDEBUG - virtual void symprint_ (int yytype, - const SemanticType* yyvaluep, - const LocationType* yylocationp); -#endif /* ! YYDEBUG */ + private: + /// State numbers. + typedef int state_type; + /// Generate an error message. + /// \param yystate the state where the error occurred. + /// \param yytoken the lookahead token. + virtual std::string yysyntax_error_ (state_type yystate, int yytoken); - /* Stacks. */ - StateStack state_stack_; - SemanticStack semantic_stack_; - LocationStack location_stack_; + /// 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); - /* Tables. */ - static const ]b4_int_type_for([b4_pact])[ pact_[]; - static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ 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(b4_table_ninf, b4_table_ninf)[ table_ninf_; - static const ]b4_int_type_for([b4_check])[ check_[]; - static const ]b4_int_type_for([b4_stos])[ stos_[]; - 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_[]; -#endif + /// 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); - /* 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_toknum])[ token_number_[]; - virtual void reduce_print_ (int yyrule); - virtual void stack_print_ (); -#endif + /// 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); - /* Even more tables. */ - inline TokenNumberType translate_ (int token); - inline void destruct_ (const char* yymsg, - int yytype, - SemanticType* yyvaluep, LocationType* yylocationp); + /// Internal symbol numbers. + typedef ]b4_int_type_for([b4_translate])[ token_number_type; + static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_; + static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_; - /// Pop \a n symbols the three stacks. - inline void pop (unsigned int n = 1); + /* Tables. */ +]b4_parser_tables_declare[ - /* Constants. */ - static const int eof_; - /* 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 unsigned int user_token_number_max_; - static const TokenNumberType undef_token_; +#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE + /// For a symbol, its name in clear. + static const char* const yytname_[]; +#endif]b4_error_verbose_if([ - /* State. */ - int n_; - int len_; - int state_; + /// Convert the symbol name \a n to a form suitable for a diagnostic. + static std::string yytnamerr_ (const char *n);])[ - /* Error handling. */ - int nerrs_; - int errstatus_; +#if YYDEBUG +]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 yy_reduce_print_ (int r); + /// Print the state stack on the debug stream. + virtual void yystack_print_ (); /* Debugging. */ int yydebug_; std::ostream* yycdebug_; +#endif - /* Look-ahead and look-ahead in internal form. */ - int looka_; - int ilooka_; - - /* Message. */ - std::string message; - - /// Semantic value of the look-ahead. - SemanticType value; - /// Location of the look-ahead. - LocationType location; - /// The locations where the error started and ended. - Location error_range_[2]; - - /// $$. - SemanticType yyval; - /// @@$. - LocationType yyloc; -]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]) - -m4_if(b4_defines_flag, 0, [], [#include @output_header_name@])[ - -/* 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) << ' '; \ - symprint_ ((Type), (Value), (Location)); \ - *yycdebug_ << std::endl; \ - } \ -} while (0) - -# define YY_REDUCE_PRINT(Rule) \ -do { \ - if (yydebug_) \ - reduce_print_ (Rule); \ -} while (0) - -# define YY_STACK_PRINT() \ -do { \ - if (yydebug_) \ - stack_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 + /// 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 YYDEBUG -/*--------------------------------. -| Print this symbol on YYOUTPUT. | -`--------------------------------*/ - -void -yy::]b4_parser_class_name[::symprint_ (int yytype, - const SemanticType* yyvaluep, const LocationType* yylocationp) -{ - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; - (void) yylocationp; - /* Backward compatibility, but should be removed eventually. */ - std::ostream& cdebug_ = *yycdebug_; - (void) cdebug_; - - *yycdebug_ << (yytype < ntokens_ ? "token" : "nterm") - << ' ' << name_[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[::destruct_ (const char* yymsg, - int yytype, SemanticType* yyvaluep, LocationType* yylocationp) -{ - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; - (void) yylocationp; + /// \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 - YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); + /// \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; - switch (yytype) + private: + /// Element of the stack: a state and its attributes. + struct stack_symbol_type : symbol_base_type { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ - default: - break; - } -} - -void -yy::]b4_parser_class_name[::pop (unsigned int n) -{ - state_stack_.pop (n); - semantic_stack_.pop (n); - location_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 () -{ - YYCDEBUG << "Starting parse" << std::endl; - - nerrs_ = 0; - errstatus_ = 0; - - /* Start. */ - state_ = 0; - looka_ = empty_; + /// The parent class. + typedef symbol_base_type super_type; -]m4_ifdef([b4_initial_action], [ -m4_pushdef([b4_at_dollar], [location])dnl -m4_pushdef([b4_dollar_dollar], [value])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. */ - state_stack_ = StateStack (0); - semantic_stack_ = SemanticStack (0); - location_stack_ = LocationStack (0); - semantic_stack_.push (value); - location_stack_.push (location); - - /* New state. */ -yynewstate: - state_stack_.push (state_); - YYCDEBUG << "Entering state " << state_ << std::endl; - goto yybackup; - - /* Backup. */ -yybackup: - - /* Try to take a decision without look-ahead. */ - n_ = pact_[state_]; - if (n_ == pact_ninf_) - goto yydefault; - - /* Read a look-ahead token. */ - if (looka_ == empty_) - yylex_ (); - - /* Convert token to internal form. */ - if (looka_ <= eof_) - { - looka_ = ilooka_ = eof_; - YYCDEBUG << "Now at end of input." << std::endl; - } - else - { - ilooka_ = translate_ (looka_); - YY_SYMBOL_PRINT ("Next token is", ilooka_, &value, &location); - } + /// Default constructor. + inline stack_symbol_type (); - /* If the proper action on seeing token ILOOKA_ is to reduce or to - detect an error, take that action. */ - n_ += ilooka_; - if (n_ < 0 || last_ < n_ || check_[n_] != ilooka_) - goto yydefault; + /// Constructor. + inline stack_symbol_type (]b4_args([state_type s], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[); - /* 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 look-ahead token. */ - YY_SYMBOL_PRINT ("Shifting", ilooka_, &value, &location); - - /* 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; - -/*-----------------------------------------------------------. -| yydefault -- do the default action for the current state. | -`-----------------------------------------------------------*/ -yydefault: - n_ = defact_[state_]; - if (n_ == 0) - goto yyerrlab; - goto yyreduce; - -/*-----------------------------. -| yyreduce -- Do a reduction. | -`-----------------------------*/ -yyreduce: - len_ = r2_[n_]; - /* 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 (len_) - yyval = semantic_stack_[len_ - 1]; - else - yyval = semantic_stack_[0]; + /// The state. + state_type state; - { - Slice slice (location_stack_, len_); - YYLLOC_DEFAULT (yyloc, slice, len_); - } - YY_REDUCE_PRINT (n_); - switch (n_) - { - ]b4_actions[ - } - -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + /// The type (corresponding to \a state). + inline int type_get_ () const; + }; - pop (len_); + /// Stack type. + typedef stack stack_type; - YY_STACK_PRINT (); + /// The stack. + stack_type yystack_; - semantic_stack_.push (yyval); - location_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. */ - 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; + /// 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. */ - report_syntax_error_ (); + /// Pop \a n symbols the three stacks. + inline void yypop_ (unsigned int n = 1); - error_range_[0] = location; - if (errstatus_ == 3) + /* Constants. */ + enum { - /* If just tried and failed to reuse look-ahead token after an - error, discard it. */ - - /* Return failure if at end of input. */ - if (looka_ <= eof_) - { - /* If at end of input, pop the error token, - then the rest of the stack, then return failure. */ - if (looka_ == eof_) - for (;;) - { - error_range_[0] = location_stack_[0]; - pop (); - if (state_stack_.height () == 1) - YYABORT; - destruct_ ("Error: popping", - stos_[state_stack_[0]], - &semantic_stack_[0], - &location_stack_[0]); - } - } - else - { - destruct_ ("Error: discarding", ilooka_, &value, &location); - looka_ = empty_; - } - } - - /* Else will try to reuse look-ahead token after shifting the error - token. */ - goto yyerrlab1; - - -/*---------------------------------------------------. -| yyerrorlab -- error raised explicitly by YYERROR. | -`---------------------------------------------------*/ -yyerrorlab: + 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. + }; -#ifdef __GNUC__ - /* Pacify GCC when the user code never invokes YYERROR and the label - yyerrorlab therefore never appears in user code. */ - if (0) - goto yyerrorlab; -#endif - - error_range_[0] = location_stack_[len_ - 1]; - pop (len_); - state_ = state_stack_[0]; - goto yyerrlab1; +]b4_parse_param_vars[ + }; -/*-------------------------------------------------------------. -| yyerrlab1 -- common code for both syntax error and YYERROR. | -`-------------------------------------------------------------*/ -yyerrlab1: - errstatus_ = 3; /* Each real token shifted decrements this. */ +]b4_lex_symbol_if([b4_yytranslate_define +b4_public_types_define])[ +]b4_namespace_close[ - 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 () == 1) - YYABORT; - - error_range_[0] = location_stack_[0]; - destruct_ ("Error: popping", - stos_[state_], &semantic_stack_[0], &location_stack_[0]); - pop (); - state_ = state_stack_[0]; - YY_STACK_PRINT (); - } +]b4_percent_define_flag_if([[global_tokens_and_yystype]], +[b4_token_defines(b4_tokens) - if (n_ == final_) - goto yyacceptlab; - - error_range_[1] = location; - // Using LOCATION is tempting, but would change the location of - // the look-ahead. YYLOC is available though. - YYLLOC_DEFAULT (yyloc, error_range_ - 1, 2); - semantic_stack_.push (value); - location_stack_.push (yyloc); - - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", stos_[n_], - &semantic_stack_[0], &location_stack_[0]); - - state_ = n_; - goto yynewstate; - - /* Accept. */ -yyacceptlab: - return 0; - - /* Abort. */ -yyabortlab: - /* Free the lookahead. */ - destruct_ ("Error: discarding lookahead", ilooka_, &value, &location); - looka_ = empty_; - return 1; -} - -void -yy::]b4_parser_class_name[::yylex_ () -{ - YYCDEBUG << "Reading a token: "; -#if YYLSP_NEEDED - looka_ = ]m4_default(b4_prefix, [yy])[lex (&value, &location); -#else - looka_ = ]m4_default(b4_prefix, [yy])[lex (&value); -#endif -} - -/** Generate an error message, and invoke yyerror. */ -void -yy::]b4_parser_class_name[::report_syntax_error_ () -{ - /* If not already recovering from an error, report this error. */ - if (!errstatus_) - { - ++nerrs_; - -#if YYERROR_VERBOSE - n_ = pact_[state_]; - if (pact_ninf_ < n_ && n_ < last_) - { - message = "syntax error, unexpected "; - message += name_[ilooka_]; - { - 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]; - } - } - } - } - else +#ifndef YYSTYPE + /* Redirection for backward compatibility. */ +# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type #endif - message = "syntax error"; - error_ (); - } -} - - -/* 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::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[ -}; - -/* 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(b4_table_ninf, b4_table_ninf) 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[ -}; - -/* YYCHECK. */ -const ]b4_int_type_for([b4_check])[ -yy::]b4_parser_class_name[::check_[] = -{ - ]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[::stos_[] = -{ - ]b4_stos[ -}; - -#if YYDEBUG -/* 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[ -}; +]) +b4_percent_code_get([[provides]])[]dnl + +[#endif /* ! defined PARSER_HEADER_H */] +@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])[ + +/* First part of user declarations. */ +]b4_user_pre_prologue[ + +#include "@basename(]b4_spec_defines_file[@)" + +/* User implementation prologue. */ +]b4_user_post_prologue +b4_percent_code_get[]dnl + +[#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[::r1_[] = -{ - ]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[::r2_[] = -{ - ]b4_r2[ -}; - -#if YYDEBUG || YYERROR_VERBOSE -/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at NTOKENS_, nonterminals. */ -const char* -const yy::]b4_parser_class_name[::name_[] = -{ - ]b4_tname[ -}; -#endif +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) ((void) (e)) +/* Enable debugging if requested. */ #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[ -}; - -/* 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[ -}; - -/* 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[ -}; - -/** Print the state stack from its BOTTOM up to its TOP (included). */ - -void -yy::]b4_parser_class_name[::stack_print_ () -{ - *yycdebug_ << "Stack now"; - for (StateStack::const_iterator i = state_stack_.begin (); - i != state_stack_.end (); ++i) - *yycdebug_ << ' ' << *i; - *yycdebug_ << std::endl; -} - -/** Report that the YYRULE is going to be reduced. */ - -void -yy::]b4_parser_class_name[::reduce_print_ (int yyrule) -{ - unsigned int yylno = rline_[yyrule]; - /* Print the symbols being reduced, and their result. */ - *yycdebug_ << "Reducing stack by rule " << n_ - 1 - << " (line " << yylno << "), "; - 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 // YYDEBUG -/* 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_table[] = - { - ]b4_translate[ - }; - if ((unsigned int) token <= user_token_number_max_) - return translate_table[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 unsigned int 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[; - -]b4_epilogue -dnl -@output stack.hh -b4_copyright([Stack handling for Bison C++ parsers], [2002, 2003, 2004])[ - -#ifndef BISON_STACK_HH -# define BISON_STACK_HH - -#include - -namespace yy -{ - template > - class Stack - { - public: +/* A pseudo ostream that takes yydebug_ into account. */ +# define YYCDEBUG if (yydebug_) (*yycdebug_) - // Hide our reversed order. - typedef typename S::reverse_iterator iterator; - typedef typename S::const_reverse_iterator const_iterator; +# define YY_SYMBOL_PRINT(Title, Symbol) \ + do { \ + if (yydebug_) \ + { \ + *yycdebug_ << Title << ' '; \ + yy_print_ (*yycdebug_, Symbol); \ + *yycdebug_ << std::endl; \ + } \ + } while (false) - Stack () : seq_ () - { - } +# define YY_REDUCE_PRINT(Rule) \ + do { \ + if (yydebug_) \ + yy_reduce_print_ (Rule); \ + } while (false) - Stack (unsigned int n) : seq_ (n) - { - } +# define YY_STACK_PRINT() \ + do { \ + if (yydebug_) \ + yystack_print_ (); \ + } while (false) - inline - T& - operator [] (unsigned int i) - { - return seq_[i]; - } +#else /* !YYDEBUG */ - inline - const T& - operator [] (unsigned int i) const - { - return seq_[i]; - } +# define YYCDEBUG if (false) std::cerr +# define YY_SYMBOL_PRINT(Title, Symbol) static_cast(0) +# define YY_REDUCE_PRINT(Rule) static_cast(0) +# define YY_STACK_PRINT() static_cast(0) - inline - void - push (const T& t) - { - seq_.push_front (t); - } +#endif /* !YYDEBUG */ - inline - void - pop (unsigned int n = 1) - { - for (; n; --n) - seq_.pop_front (); - } +#define yyerrok (yyerrstatus_ = 0) +#define yyclearin (yyempty = true) - inline - unsigned int - height () const - { - return seq_.size (); - } +#define YYACCEPT goto yyacceptlab +#define YYABORT goto yyabortlab +#define YYERROR goto yyerrorlab +#define YYRECOVERING() (!!yyerrstatus_) - inline const_iterator begin () const { return seq_.rbegin (); } - inline const_iterator end () const { return seq_.rend (); } +]b4_namespace_open[]b4_error_verbose_if([[ - private: + /* 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) + { + 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; + } +]])[ - S seq_; - }; + /// Build a parser object. + ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [ + :])[ +#if YYDEBUG + ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false), + yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[ +#endif]b4_parse_param_cons[ + { + } - template > - class Slice + ]b4_parser_class_name::~b4_parser_class_name[ () { - public: + } - Slice (const S& stack, - unsigned int range) : stack_ (stack), - range_ (range) - { - } - inline - const T& - operator [] (unsigned int i) const - { - return stack_[range_ - i]; - } + /*---------------. + | Symbol types. | + `---------------*/ - private: +]b4_lex_symbol_if([], [b4_public_types_define])[ - const S& stack_; - unsigned int range_; - }; -} + // stack_symbol_type. + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type () + : super_type () + , state () + { + } -#endif // not BISON_STACK_HH] -dnl -@output position.hh -b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004])[ + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_args( + [state_type s], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[) + : super_type (v]b4_locations_if([, l])[) + , state (s) + { + } -/** - ** \file position.hh - ** Define the Location class. - */ + int + ]b4_parser_class_name[::stack_symbol_type::type_get_ () const + { + return yystos_[state]; + } -#ifndef BISON_POSITION_HH -# define BISON_POSITION_HH -# include -# include + template + void + ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, + symbol_base_type& yysym) const + { + int yytype = yysym.type_get (); + YYUSE (yymsg); + if (yymsg) + YY_SYMBOL_PRINT (yymsg, yysym); + + // User destructor. + switch (yytype) + { +]b4_symbol_foreach([b4_symbol_destructor])dnl +[ default: + break; + }]b4_variant_if([ + + // Type destructor. + b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[ + } -namespace yy -{ - /** \brief Abstract a Position. */ - class Position +#if YYDEBUG + template + void + ]b4_parser_class_name[::yy_print_ (std::ostream& yyo, + const symbol_base_type& yysym) const { - public: - /** \brief Initial column number. */ - static const unsigned int initial_column = 0; - /** \brief Initial line number. */ - static const unsigned int initial_line = 1; + 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 - /** \name Ctor & dtor. - ** \{ */ - public: - /** \brief Construct a Position. */ - Position () : - filename (), - line (initial_line), - column (initial_column) - { - } - /** \} */ + void + ]b4_parser_class_name[::yypush_ (const char* m, state_type s, + symbol_type& sym) + { + if (m) + YY_SYMBOL_PRINT (m, sym); +]b4_variant_if( +[[ yystack_.push (stack_symbol_type (]b4_args( + [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_args( + [s], + [sym.value], + b4_locations_if([sym.location]))[));]])[ + } + 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_args( + [s.state], + [semantic_type()], + b4_locations_if([s.location]))[)); + ]b4_symbol_variant([[yystos_[s.state]]], [[yystack_[0].value]], + [build], [s.value])], +[ yystack_.push (s);])[ + } - /** \name Line and Column related manipulators - ** \{ */ - public: - /** \brief (line related) Advance to the COUNT next lines. */ - inline void lines (int count = 1) - { - column = initial_column; - line += count; - } + void + ]b4_parser_class_name[::yypop_ (unsigned int n) + { + yystack_.pop (n); + } - /** \brief (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; - } - /** \} */ +#if YYDEBUG + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } - public: - /** \brief File name to which this position refers. */ - std::string filename; - /** \brief Current line number. */ - unsigned int line; - /** \brief Current column number. */ - unsigned int column; - }; + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } - /** \brief 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_; } - /** \brief 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 - /** \brief 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_]; } - /** \brief 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.empty ()) - 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])[ + 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];]])[ - /** \brief Abstract a Location. */ - class Location - { - /** \name Ctor & dtor. - ** \{ */ - public: - /** \brief Construct a Location. */ - Location (void) : - begin (), - end () - { - } - /** \} */ + /// $$ and @@$. + stack_symbol_type yylhs; + /// The return value of parse(). + int yyresult; - /** \name Line and Column related manipulators - ** \{ */ - public: - /** \brief Reset initial location to final location. */ - inline void step (void) + YYCDEBUG << "Starting parse" << std::endl; + +]m4_ifdef([b4_initial_action], [ +m4_pushdef([b4_at_dollar], [yyla.location])dnl +m4_pushdef([b4_dollar_dollar], [yyla.value])dnl + /* User initialization code. */ + b4_user_initial_action +m4_popdef([b4_dollar_dollar])dnl +m4_popdef([b4_at_dollar])])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_ (0, 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: "; +]b4_lex_symbol_if( +[ yyla = b4_c_function_call([yylex], [symbol_type], + m4_ifdef([b4_lex_param], b4_lex_param));], +[ yyla.type = yytranslate_ (b4_c_function_call([yylex], [int], + [[YYSTYPE*], [&yyla.value]][]dnl +b4_locations_if([, [[location*], [&yyla.location]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ + 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 $$=$1 action is NOT applied when using + variants. */ + b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[ + /* If YYLEN is nonzero, implement the default value of the action: + `$$ = $1'. Otherwise, use the top of the stack. + + Otherwise, the following line sets YYLHS.VALUE to garbage. + This behavior is undocumented and Bison + users should not rely upon it. */ + if (yylen) + yylhs.value = yystack_@{yylen - 1@}.value; + else + yylhs.value = yystack_@{0@}.value;])[ +]b4_locations_if([dnl +[ + // Compute the default @@$. { - begin = end; - } + slice slice (yystack_, yylen); + YYLLOC_DEFAULT (yylhs.location, slice, yylen); + }]])[ - /** \brief Extend the current location to the COUNT next columns. */ - inline void columns (unsigned int count = 1) + // Perform the reduction. + YY_REDUCE_PRINT (yyn); + try { - end += count; + switch (yyn) + { +]b4_user_actions[ + default: + break; + } } - - /** \brief Extend the current location to the COUNT next lines. */ - inline void lines (unsigned int count = 1) + catch (const syntax_error& yyexc) { - end.lines (count); + error (]b4_args(b4_locations_if([yyexc.location]), + [[yyexc.what()]])[); + 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 contruction 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_ (0, yystack_[i]);]])[ + + yypop_ (yylen); + yylen = 0; + YY_STACK_PRINT (); + + /* Shift the result of the reduction. */ + yypush_ (0, yylhs); + goto yynewstate; + + /*--------------------------------------. + | yyerrlab -- here on detecting error. | + `--------------------------------------*/ + yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus_) + { + ++yynerrs_; + error (]b4_args(b4_locations_if([yyla.location]), + [[yysyntax_error_ (yystack_[0].state, 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. */ + { + 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: - /** \brief Beginning of the located region. */ - Position begin; - /** \brief 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; + } - /** \brief Join two Location objects to create a Location. */ - inline const Location operator+ (const Location& begin, const Location& end) + // Generate an error message. + std::string + ]b4_parser_class_name[::yysyntax_error_ (]dnl +b4_error_verbose_if([state_type yystate, int yytoken], + [int, int])[) { - Location res = begin; - res.end = end.end; - return res; + std::string yyres;]b4_error_verbose_if([[ + int yyn = yypact_[yystate]; + if (yypact_ninf_ < yyn && yyn <= yylast_) + { + /* 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_; + + // 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]; + yyarg[yycount++] = yytname_[yytoken]; + 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 = 0; + switch (yycount) + { +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + 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; + } + else + ]])dnl +[ yyres = YY_("syntax error"); + return yyres; } - /** \brief Add two Location objects */ - inline const Location operator+ (const Location& begin, 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[ + +#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_[] = { - Location res = begin; - res.columns (width); - return res; - } + ]b4_tname[ + }; +#endif - /** \brief Add and assign a Location */ - inline Location& operator+= (Location& res, unsigned int width) +#if YYDEBUG +]b4_integral_parser_table_define([rline], [b4_rline])[ + + // Print the state stack on the debug stream. + void + ]b4_parser_class_name[::yystack_print_ () { - res.columns (width); - return res; + *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; } - /** \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) + // 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) { - Position last = loc.end - 1; - ostr << loc.begin; - if (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; + 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 // YYDEBUG -} - -#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