X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/cf147260d296ffc3544ddf68565bbdd22dfebab1..2873fdf8b1f91a9cbc8d258367c920eb637a0099:/data/lalr1.cc diff --git a/data/lalr1.cc b/data/lalr1.cc index 043b082a..4915caa2 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,64 +1,440 @@ -m4_divert(-1) - # C++ skeleton for Bison -# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. +# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 +# 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]) +# b4_table_define(TABLE-NAME, CONTENT) +# ------------------------------------ +# Define "parser::yy_" which contents is CONTENT. +m4_define([b4_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. +m4_copy([b4_symbol_value], [b4_symbol_value_template]) + +# How the semantic value is extracted when using variants. +b4_variant_if([ + # b4_symbol_value(VAL, [TYPE]) + # ---------------------------- + m4_define([b4_symbol_value], + [m4_ifval([$2], + [$1.as<$2>()], + [$1])]) + + # b4_symbol_value_template(VAL, [TYPE]) + # ------------------------------------- + # Same as b4_symbol_value, but used in a template method. + m4_define([b4_symbol_value_template], + [m4_ifval([$2], + [$1.template as<$2>()], + [$1])]) +]) # b4_variant_if + + +# b4_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT]) +# ------------------------------------------------ +m4_define([b4_assert_if], +[b4_percent_define_ifdef([[assert]], [$1], [$2])]) + + +# 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_@{($1) - ($2)@}]) + + +# 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(NUM, FIELD) +# --------------------- +# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if +# undefined. +m4_define([b4_symbol], +[m4_indir([b4_symbol($1, $2)])]) + + +# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE) +# ------------------------------------------- +# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE. +# Otherwise an error. +m4_define([b4_symbol_if], +[m4_case(b4_symbol([$1], [$2]), + [1], [$3], + [0], [$4], + [m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])]) + + +# b4_symbol_actions(FILENAME, LINENO, +# SYMBOL-TAG, SYMBOL-NUM, +# SYMBOL-ACTION, SYMBOL-TYPENAME) +# ------------------------------------------------- +# Same as in C, but using references instead of pointers. +m4_define([b4_symbol_actions], +[m4_pushdef([b4_dollar_dollar], + [b4_symbol_value_template([yysym.value], [$6])])dnl +m4_pushdef([b4_at_dollar], [yysym.location])dnl + case $4: // $3 +b4_syncline([$2], [$1]) + $5; +b4_syncline([@oline@], [@ofile@]) + break; +m4_popdef([b4_at_dollar])dnl +m4_popdef([b4_dollar_dollar])dnl +]) + + +# b4_symbol_case_(SYMBOL-NUM) +# --------------------------- +# Issue a "case NUM" for SYMBOL-NUM. +m4_define([b4_symbol_case_], +[ case b4_symbol([$1], [number]): // b4_symbol([$1], [tag]) +]) + + +# b4_type_action_(NUMS) +# --------------------- +# Run actions for the symbol NUMS that all have the same type-name. +# Skip NUMS that have no type-name. +m4_define([b4_type_action_], +[b4_symbol_if([$1], [has_type_name], +[m4_map([b4_symbol_case_], [$@])[]dnl + b4_dollar_dollar([b4_symbol([$1], [number])], + [b4_symbol([$1], [tag])], + [b4_symbol([$1], [type_name])]); + break; + +])]) + + +# b4_symbol_constructor_declaration_(SYMBOL-NUMBERS) +# ---------------------------------------------------- +# Declare the overloaded version of make_symbol for the (common) type of +# these SYMBOL-NUMBERS. Use at class-level. +m4_define([b4_symbol_constructor_declaration_], +[ template + static inline symbol_type + make_symbol (b4_symbol_if([$1], [has_type_name], + [const b4_symbol([$1], [type_name])& v, ])dnl +const location_type& l); + +]) + +# b4_symbol_constructor_declarations +# ---------------------------------- +# Declare the overloaded versions of make_symbol for all the value types. +# Use at class-level. +m4_define([b4_symbol_constructor_declarations], +[b4_variant_if([ + // Declaration of make_symbol for each value type. +m4_map([b4_symbol_constructor_declaration_], m4_defn([b4_type_names]))])]) + + + +# b4_symbol_constructor_specialization_(SYMBOL-NUMBER) +# ---------------------------------------------------- +# Declare the specialization of make_symbol for this each SYMBOL-NUMBER. +# Specializations cannot be declared at class-level, this must be done +# at namespace-level. +m4_define([b4_symbol_constructor_specialization_], +[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [tag_is_id], +[ template <> + inline + b4_parser_class_name::symbol_type + b4_parser_class_name::make_symbol (dnl +b4_symbol_if([$1], [has_type_name], + [const b4_symbol([$1], [type_name])& v, ])dnl +const b4_parser_class_name::location_type& l); +])])]) + +# b4_symbol_constructor_specializations +# ------------------------------------- +# Declare specializations of make_symbol. +m4_define([b4_symbol_constructor_specializations], +[b4_variant_if([ + // Specializations of make_symbol for each symbol type. +m4_map([b4_symbol_constructor_specialization_], + m4_defn([b4_symbol_numbers]))])dnl +]) + + + +# b4_symbol_constructor_definition_(SYMBOL-NUMBER) +# ------------------------------------------------ +# Define make_symbol for this SYMBOL-NUMBER. +m4_define([b4_symbol_constructor_definition_], +[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [tag_is_id], +[ template <> + b4_parser_class_name::symbol_type + b4_parser_class_name::make_symbol (dnl +b4_symbol_if([$1], [has_type_name], + [const b4_symbol([$1], [type_name])& v, ])dnl +const location_type& l) + { + return symbol_type (yytranslate_ (token::b4_symbol([$1], [tag])),dnl + b4_symbol_if([$1], [has_type_name], [v, ])l); + } + +])])]) + + +# b4_symbol_constructor_declarations +# ---------------------------------- +# Define the overloaded versions of make_symbol for all the value types. +m4_define([b4_symbol_constructor_definitions], +[b4_variant_if( +[ // Implementation of make_symbol for each symbol type. +m4_map([b4_symbol_constructor_definition_], m4_defn([b4_symbol_numbers]))])]) + + +# b4_symbol_variant(YYTYPE, YYVAL, ACTION, [ARGS]) +# ------------------------------------------------ +# Run some ACTION ("build", or "destroy") on YYVAL of symbol type +# YYTYPE. +m4_define([b4_symbol_variant], +[m4_pushdef([b4_dollar_dollar], + [$2.$3<$][3>(m4_shift3($@))])dnl + switch ($1) + { +m4_map([b4_type_action_], m4_defn([b4_type_names]))[]dnl + default: + break; + } +m4_popdef([b4_dollar_dollar])dnl +]) + + +# _b4_char_sizeof_counter +# ----------------------- +# A counter used by _b4_char_sizeof_dummy to create fresh symbols. +m4_define([_b4_char_sizeof_counter], +[0]) + +# _b4_char_sizeof_dummy +# --------------------- +# At each call return a new C++ identifier. +m4_define([_b4_char_sizeof_dummy], +[m4_define([_b4_char_sizeof_counter], m4_incr(_b4_char_sizeof_counter))dnl +dummy[]_b4_char_sizeof_counter]) + + +# b4_char_sizeof(SYMBOL-NUM) +# -------------------------- +# To be mapped on the list of type names to produce: +# +# char dummy1[sizeof(type_name_1)]; +# char dummy2[sizeof(type_name_2)]; +# +# for defined type names. +# $3 is doubly-quoted, do not quote it again. +m4_define([b4_char_sizeof], +[m4_ifval(b4_symbol([$1], [type_name]), +[ + char _b4_char_sizeof_dummy@{sizeof([b4_symbol([$1], [type_name])])@}; // b4_symbol([$1], [tag])])dnl +]) + + +m4_pushdef([b4_copyright_years], + [2002, 2003, 2004, 2005, 2006, 2007, 2008]) + +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]])]) + +# Backward compatibility. +m4_define([b4_location_constructors]) +m4_include(b4_pkgdatadir/[location.cc]) + # We do want M4 expansion after # for CPP macros. m4_changecom() -m4_divert(0)dnl -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. :( */ +m4_divert_push(0)dnl +b4_defines_if( +[@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 +]b4_percent_code_get([[requires]])[ + +]b4_assert_if([#include ])[ #include #include +#include "stack.hh" -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ - -namespace yy -{ +]b4_namespace_open[ class position; class location; -} +]b4_variant_if( +[[ + /// A char[S] buffer to store and retrieve objects. + /// + /// Sort of a variant, but does not keep track of the nature + /// of the stored data, since that knowledge is available + /// via the current state. + template + struct variant + {]b4_assert_if([ + /// Whether something is contained. + bool built; +])[ + /// Empty construction. + inline + variant ()]b4_assert_if([ + : built(false)])[ + {} + + /// Instantiate a \a T in here. + template + inline T& + build() + {]b4_assert_if([ + assert(!built); + built = true;])[ + return *new (buffer) T; + } + + /// Instantiate a \a T in here from \a t. + template + inline T& + build(const T& t) + {]b4_assert_if([ + assert(!built); + built = true;])[ + return *new (buffer) T(t); + } -]b4_token_enums(b4_tokens)[ + /// Construct and fill. + template + inline + variant (const T& t)]b4_assert_if([ + : built(true)])[ + { + new (buffer) T(t); + } -/* Copy the first part of user declarations. */ -]b4_pre_prologue[ + /// Accessor to a built \a T. + template + inline T& + as() + {]b4_assert_if([ + assert(built);])[ + return reinterpret_cast(buffer); + } -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + /// Const accessor to a built \a T (for %printer). + template + inline const T& + as() const + {]b4_assert_if([ + assert(built);])[ + return reinterpret_cast(buffer); + } + + /// Swap the content with \a other. + template + inline void + swap(variant& other) + { + std::swap(as(), other.as()); + } + + /// Assign the content of \a other to this. + /// Destroys \a other. + template + inline void + build(variant& other) + { + build(); + swap(other); + other.destroy(); + } + + /// Destroy the stored \a T. + template + inline void + destroy() + { + as().~T();]b4_assert_if([ + built = false;])[ + } + + /// A buffer large enough to store any of the semantic values. + char buffer[S]; + }; +]])[ +]b4_namespace_close[ -#include "stack.hh" #include "location.hh" /* Enabling traces. */ #ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ +# define YYDEBUG ]b4_debug_flag[ #endif /* Enabling verbose error messages. */ @@ -66,7 +442,7 @@ b4_syncline([@oline@], [@ofile@])[ # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else -# define YYERROR_VERBOSE ]b4_error_verbose[ +# define YYERROR_VERBOSE ]b4_error_verbose_flag[ #endif /* Enabling the token table. */ @@ -74,88 +450,70 @@ b4_syncline([@oline@], [@ofile@])[ # 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 - -/* 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) +# 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 -namespace yy -{ - class ]b4_parser_class_name[; +]b4_namespace_open[ - template - struct traits - { - }; - - 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; - }; -} - -namespace yy -{ /// A Bison parser. class ]b4_parser_class_name[ { + public: +#ifndef YYSTYPE +]b4_variant_if( +[ /// An auxiliary type to compute the largest semantic type. + union union_type + {]m4_map([b4_char_sizeof], m4_defn([b4_symbol_numbers]))[ + }; + /// Symbol semantic values. - typedef traits<]b4_parser_class_name[>::semantic_type semantic_type; + typedef variant semantic_type;], +[ /// Symbol semantic values. +m4_ifdef([b4_stype], +[ union semantic_type + {b4_user_stype + };], +[m4_if(b4_tag_seen_flag, 0, +[[ typedef int semantic_type;]], +[[ typedef YYSTYPE semantic_type;]])])])[ +#else + typedef YYSTYPE semantic_type; +#endif /// Symbol locations. - typedef traits<]b4_parser_class_name[>::location_type location_type; - - public: - /// Build a parser object. - ]b4_parser_class_name[ (]b4_parse_param_decl[) : - yydebug_ (false), - yycdebug_ (&std::cerr)]b4_parse_param_cons[ + typedef ]b4_percent_define_get([[location_type]])[ location_type; + /// Tokens. + struct token { - } + ]b4_token_enums(b4_tokens)[ + }; + /// Token type. + typedef token::yytokentype token_type; - virtual ~]b4_parser_class_name[ () - { - } + /// Build a parser object. + ]b4_parser_class_name[ (]b4_parse_param_decl[); + virtual ~]b4_parser_class_name[ (); /// Parse. /// \returns 0 iff parsing succeeded. virtual int parse (); +#if YYDEBUG /// The current debugging stream. std::ostream& debug_stream () const; /// Set the current debugging stream. @@ -167,6 +525,7 @@ 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. @@ -175,38 +534,15 @@ namespace yy virtual void error (const location_type& loc, const std::string& msg); /// Generate an error message. - /// \param tok the look-ahead token. - virtual std::string yysyntax_error_ (int tok); - -#if YYDEBUG - /// \brief Report a symbol on the debug stream. - /// \param yytype The token type. - /// \param yyvaluep Its semantic value. - /// \param yylocationp Its location. - virtual void yysymprint_ (int yytype, - const semantic_type* yyvaluep, - const location_type* yylocationp); -#endif /* ! YYDEBUG */ - + /// \param state the state where the error occurred. + /// \param tok the lookahead token. + virtual std::string yysyntax_error_ (int yystate, int tok); /// 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_; + typedef int state_type; /// Internal symbol numbers. - typedef traits<]b4_parser_class_name[>::token_number_type token_number_type; + typedef ]b4_int_type_for([b4_translate])[ token_number_type; /* Tables. */ /// For a state, the index in \a yytable_ of its portion. static const ]b4_int_type_for([b4_pact])[ yypact_[]; @@ -249,82 +585,185 @@ namespace yy #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_[]; /// 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_ (); + + /* Debugging. */ + int yydebug_; + std::ostream* yycdebug_; #endif - /// Convert a scanner token number to a symbol number. - inline token_number_type yytranslate_ (int token); + /// Convert a scanner token number \a t to a symbol number. + static inline token_number_type yytranslate_ (int t); + + /// A complete symbol, with its type. + template + struct symbol_base_type + { + /// Default constructor. + inline symbol_base_type (); + + /// Constructor. + inline symbol_base_type (const location_type& l); + inline symbol_base_type (const semantic_type& v, const location_type& l); + + /// Return this with its exact type. + const Exact& self () const; + Exact& self (); + + /// Return the type of this symbol. + int type_get () const; + + /// The semantic value. + semantic_type value; + + /// The location. + location_type location; + }; + +#if YYDEBUG + /// \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 /// \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); + /// \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; - /// Pop \a n symbols the three stacks. - inline void yypop_ (unsigned int n = 1); + public: + /// Element of the stack: a state and its attributes. + struct symbol_type : symbol_base_type + { + /// The parent class. + typedef symbol_base_type super_type; - /* 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_; + /// Default constructor. + inline symbol_type (); - /* State. */ - int yyn_; - int yylen_; - int yystate_; + /// Constructor. + inline symbol_type (int t, + const semantic_type& v, const location_type& l); - /* Error handling. */ - int yynerrs_; - int yyerrstatus_; + inline symbol_type (int t, + const location_type& l); - /* Debugging. */ - int yydebug_; - std::ostream* yycdebug_; + /// The symbol type. + int type; + + /// Return the type corresponding to this state. + inline int type_get_ () const; + }; + +]b4_symbol_constructor_declarations[ + + private: + /// Element of the stack: a state and its attributes. + struct stack_symbol_type : symbol_base_type + { + /// The parent class. + typedef symbol_base_type super_type; + + /// Default constructor. + inline stack_symbol_type (); + + /// Constructor. + inline stack_symbol_type (state_type s, + const semantic_type& v, const location_type& l); + + /// The state. + state_type state; + + /// Return the type corresponding to this state. + inline int type_get_ () const; + }; + + /// Stack type. + typedef stack stack_type; + + /// The stack. + stack_type yystack_; + + /// 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); + + /// 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); + + /// Pop \a n symbols the three stacks. + inline void yypop_ (unsigned int n = 1); + + /* Constants. */ + enum + { + 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. + }; ]b4_parse_param_vars[ }; -} +]b4_symbol_constructor_specializations[ +]b4_namespace_close[ + +]b4_percent_define_flag_if([[global_tokens_and_yystype]], +[b4_token_defines(b4_tokens) + +#ifndef YYSTYPE + /* Redirection for backward compatibility. */ +# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type +#endif +]) +b4_percent_code_get([[provides]])[]dnl -#endif /* ! defined PARSER_HEADER_H */] +[#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], [], +@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]) -m4_if(b4_defines_flag, 0, [], -[ -#include @output_header_name@])[ +#define yylex b4_prefix[]lex])[ + +/* First part of user declarations. */ +]b4_user_pre_prologue -#ifndef YY_ +b4_defines_if([[ +#include "@basename(]b4_spec_defines_file[@)"]])[ + +/* User implementation prologue. */ +]b4_user_post_prologue +b4_percent_code_get[]dnl + +[#ifndef YY_ # if YYENABLE_NLS # if ENABLE_NLS # include /* FIXME: INFRINGES ON USER NAME SPACE */ @@ -336,713 +775,784 @@ m4_if(b4_defines_flag, 0, [], # endif #endif -/* A pseudo ostream that takes yydebug_ into account. */ -# define YYCDEBUG \ - for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \ - (*yycdebug_) +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) ((void) (e)) /* 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) +/* 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_) \ - yyreduce_print_ (Rule); \ -} while (0) + do { \ + if (yydebug_) \ + yy_reduce_print_ (Rule); \ + } while (false) # define YY_STACK_PRINT() \ -do { \ - if (yydebug_) \ - yystack_print_ (); \ -} while (0) + do { \ + if (yydebug_) \ + yystack_print_ (); \ + } while (false) #else /* !YYDEBUG */ -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) -# define YY_REDUCE_PRINT(Rule) -# define YY_STACK_PRINT() +# 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) #endif /* !YYDEBUG */ +#define yyerrok (yyerrstatus_ = 0) +#define yyclearin (yychar = yyempty_) + #define YYACCEPT goto yyacceptlab #define YYABORT goto yyabortlab #define YYERROR goto yyerrorlab +#define YYRECOVERING() (!!yyerrstatus_) +]b4_namespace_open[ #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; -} + /* 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; + } #endif + /// Build a parser object. + ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [ + :])[ #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 yylooka; - int yyilooka; - - /// 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; - yylooka = yyempty_; + ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false), + yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[ +#endif]b4_parse_param_cons[ + { + } -]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 (yylooka == yyempty_) - { - YYCDEBUG << "Reading a token: "; - yylooka = ]b4_c_function_call([yylex], [int], -[[YYSTYPE*], [&yylval]][]dnl -b4_location_if([, [[location*], [&yylloc]]])dnl -m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; - } + ]b4_parser_class_name::~b4_parser_class_name[ () + { + } - /* Convert token to internal form. */ - if (yylooka <= yyeof_) - { - yylooka = yyilooka = yyeof_; - YYCDEBUG << "Now at end of input." << std::endl; - } - else - { - yyilooka = yytranslate_ (yylooka); - YY_SYMBOL_PRINT ("Next token is", yyilooka, &yylval, &yylloc); - } + /*---------------. + | Symbol types. | + `---------------*/ - /* If the proper action on seeing token ILOOKA_ is to reduce or to - detect an error, take that action. */ - yyn_ += yyilooka; - if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yyilooka) - goto yydefault; + // symbol_base_type. + template + ]b4_parser_class_name[::symbol_base_type::symbol_base_type () + : value() + , location() + { + } - /* 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", yyilooka, &yylval, &yylloc); - - /* Discard the token being shifted unless it is eof. */ - if (yylooka != yyeof_) - yylooka = 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]; + template + ]b4_parser_class_name[::symbol_base_type::symbol_base_type (const location_type& l) + : value() + , location(l) + { + } + template + ]b4_parser_class_name[::symbol_base_type::symbol_base_type (const semantic_type& v, const location_type& l) + : value(v) + , location(l) { - slice slice (yylocation_stack_, yylen_); - YYLLOC_DEFAULT (yyloc, slice, yylen_); } - YY_REDUCE_PRINT (yyn_); - switch (yyn_) - { - ]b4_actions[ - default: break; - } -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + template + const Exact& + ]b4_parser_class_name[::symbol_base_type::self () const + { + return static_cast(*this); + } - yypop_ (yylen_); + template + Exact& + ]b4_parser_class_name[::symbol_base_type::self () + { + return static_cast(*this); + } - YY_STACK_PRINT (); + template + int + ]b4_parser_class_name[::symbol_base_type::type_get () const + { + return self ().type_get_ (); + } - yysemantic_stack_.push (yyval); - yylocation_stack_.push (yyloc); + // symbol_type. + ]b4_parser_class_name[::symbol_type::symbol_type () + : super_type () + , type () + { + } - /* 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; + ]b4_parser_class_name[::symbol_type::symbol_type (int t, + const location_type& l) + : super_type (l) + , type (t) + { + } -/*------------------------------------. -| yyerrlab -- here on detecting error | -`------------------------------------*/ -yyerrlab: - /* If not already recovering from an error, report this error. */ - if (!yyerrstatus_) - { - ++yynerrs_; - error (yylloc, yysyntax_error_ (yyilooka)); - } + ]b4_parser_class_name[::symbol_type::symbol_type (int t, + const semantic_type& v, const location_type& l) + : super_type (v, l) + , type (t) + { + } - yyerror_range[0] = yylloc; - if (yyerrstatus_ == 3) - { - /* If just tried and failed to reuse look-ahead token after an - error, discard it. */ + int + ]b4_parser_class_name[::symbol_type::type_get_ () const + { + return type; + } - if (yylooka <= yyeof_) - { - /* Return failure if at end of input. */ - if (yylooka == yyeof_) - YYABORT; - } - else - { - yydestruct_ ("Error: discarding", yyilooka, &yylval, &yylloc); - yylooka = yyempty_; - } - } +]b4_symbol_constructor_definitions[ - /* Else will try to reuse look-ahead token after shifting the error - token. */ - goto yyerrlab1; + // stack_symbol_type. + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type () + : super_type () + , state () + { + } + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, + const semantic_type& v, const location_type& l) + : super_type (v, l) + , state (s) + { + } -/*---------------------------------------------------. -| yyerrorlab -- error raised explicitly by YYERROR. | -`---------------------------------------------------*/ -yyerrorlab: + int + ]b4_parser_class_name[::stack_symbol_type::type_get_ () const + { + return yystos_[state]; + } - /* Pacify compilers like GCC when the user code never invokes - YYERROR and the label yyerrorlab therefore never appears in user - code. */ - if (false) - goto yyerrorlab; - yyerror_range[0] = yylocation_stack_[yylen_ - 1]; - yypop_ (yylen_); - yystate_ = yystate_stack_[0]; - goto yyerrlab1; + 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) + { +]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ + default: + break; + }]b4_variant_if([ -/*-------------------------------------------------------------. -| yyerrlab1 -- common code for both syntax error and YYERROR. | -`-------------------------------------------------------------*/ -yyerrlab1: - yyerrstatus_ = 3; /* Each real token shifted decrements this. */ + // Type destructor. + b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[ + } - for (;;) - { - yyn_ = yypact_[yystate_]; - if (yyn_ != yypact_ninf_) - { - yyn_ += yyterror_; - if (0 <= yyn_ && yyn_ <= yylast_ && yycheck_[yyn_] == yyterror_) - { - yyn_ = yytable_[yyn_]; - if (0 < yyn_) - break; - } - } - - /* Pop the current state because it cannot handle the error token. */ - if (yystate_stack_.height () == 1) - YYABORT; - - yyerror_range[0] = yylocation_stack_[0]; - yydestruct_ ("Error: popping", - yystos_[yystate_], - &yysemantic_stack_[0], &yylocation_stack_[0]); - yypop_ (); - yystate_ = yystate_stack_[0]; - YY_STACK_PRINT (); - } +#if YYDEBUG + template + void + ]b4_parser_class_name[::yy_print_ (std::ostream& yyo, + const symbol_base_type& yysym) const + { + int yytype = yysym.type_get (); + yyo << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yytname_[yytype] << " (" + << yysym.location << ": "; + switch (yytype) + { +]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))[ + default: + break; + } + yyo << ')'; + } +#endif + + 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 (s, semantic_type(), sym.location)); + ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]], + [build], [sym.value])], +[ yystack_.push (stack_symbol_type (s, sym.value, 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 (s.state, semantic_type(), 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); + } + +#if YYDEBUG + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } + + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } + + + ]b4_parser_class_name[::debug_level_type + ]b4_parser_class_name[::debug_level () const + { + return yydebug_; + } - if (yyn_ == yyfinal_) - goto yyacceptlab; + void + ]b4_parser_class_name[::set_debug_level (debug_level_type l) + { + yydebug_ = l; + } +#endif - 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); + int + ]b4_parser_class_name[::parse () + { + /// Coded type of the lookahead. + int yychar = yyempty_; + + /* State. */ + int yyn; + int yylen = 0; + int yystate = 0; - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_], - &yysemantic_stack_[0], &yylocation_stack_[0]); + /* Error handling. */ + int yynerrs_ = 0; + int yyerrstatus_ = 0; - yystate_ = yyn_; - goto yynewstate; + /// The lookahead symbol. + symbol_type yyla; - /* Accept. */ -yyacceptlab: - yyresult_ = 0; - goto yyreturn; + /// The locations where the error started and ended. + stack_symbol_type yyerror_range[2]; - /* Abort. */ -yyabortlab: - yyresult_ = 1; - goto yyreturn; + /// $$ and @@$. + stack_symbol_type yylhs; -yyreturn: - if (yylooka != yyeof_ && yylooka != yyempty_) - yydestruct_ ("Cleanup: discarding lookahead", yyilooka, &yylval, &yylloc); + /// The return value of parse(). + int yyresult; - while (yystate_stack_.height () != 1) + 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 state was pushed on the stack. + // Invariant: yystate == yystack_[0].state, i.e., + // yystate was just pushed onto the state stack. + yynewstate: + YYCDEBUG << "Entering state " << yystate << std::endl; + + /* Accept? */ + if (yystate == yyfinal_) + goto yyacceptlab; + + goto yybackup; + + /* Backup. */ + yybackup: + + /* Try to take a decision without lookahead. */ + yyn = yypact_[yystate]; + if (yyn == yypact_ninf_) + goto yydefault; + + /* Read a lookahead token. */ + if (yychar == yyempty_) + { + YYCDEBUG << "Reading a token: "; + yychar = ]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))[; + } + + /* Convert token to internal form. */ + if (yychar <= yyeof_) + { + yychar = yyla.type = yyeof_; + YYCDEBUG << "Now at end of input." << std::endl; + } + else + { + yyla.type = yytranslate_ (yychar); + 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 (yyn == 0 || yyn == yytable_ninf_) + goto yyerrlab; + yyn = -yyn; + goto yyreduce; + } + + /* Discard the token being shifted. */ + yychar = yyempty_; + + /* Count tokens shifted since error; after three, turn off error + status. */ + if (yyerrstatus_) + --yyerrstatus_; + + /* Shift the lookahead token. */ + yystate = yyn; + yypush_ ("Shifting", yystate, yyla); + 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];]b4_variant_if([ + /* Variants are always initialized to an empty instance of the + correct type. The default $$=$1 rule is NOT applied when using + variants */ + ]b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])[],[ + /* If YYLEN is nonzero, implement the default value of the action: + `$$ = $1'. Otherwise, use the top of the stack. + + Otherwise, the following line sets YYLHS.VALUE to garbage. + This behavior is undocumented and Bison + users should not rely upon it. */ + if (yylen) + yylhs.value = yystack_@{yylen - 1@}.value; + else + yylhs.value = yystack_@{0@}.value;])[ + + // Compute the default @@$. { - yydestruct_ ("Cleanup: popping", - yystos_[yystate_stack_[0]], - &yysemantic_stack_[0], - &yylocation_stack_[0]); - yypop_ (); + slice slice (yystack_, yylen); + YYLLOC_DEFAULT (yylhs.location, slice, yylen); } - return yyresult_; -} + // Perform the reduction. + YY_REDUCE_PRINT (yyn); + switch (yyn) + { +]b4_user_actions[ + default: + break; + } + // Compute post-reduction state. + yyn = yyr1_[yyn]; + yystate = yypgoto_[yyn - yyntokens_] + yystack_[yylen].state; + if (0 <= yystate && yystate <= yylast_ + && yycheck_[yystate] == yystack_[yylen].state) + yystate = yytable_[yystate]; + else + yystate = yydefgoto_[yyn - yyntokens_]; + yylhs.state = yystate; + YY_SYMBOL_PRINT ("-> $$ =", yylhs); +]b4_variant_if([[ + // Destroy the lhs symbols. + for (int i = 0; i < yylen; ++i) + // Destroy a variant which value may have be swapped with + // yylhs.value. The value of yylhs.value (hence maybe one of + // these lhs symbols) depends on what does the default + // contruction for this type. In the case of pointers for + // instance, nothing is done, so the value is junk. Therefore + // do not try to report the content in the debug trace, it's + // 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 (yyla.location, yysyntax_error_ (yystate, yyla.type)); + } + + yyerror_range[0].location = yyla.location; + if (yyerrstatus_ == 3) + { + /* If just tried and failed to reuse lookahead token after an + error, discard it. */ -// Generate an error message. -std::string -yy::]b4_parser_class_name[::yysyntax_error_ (int tok) -{ - std::string res; -#if YYERROR_VERBOSE - yyn_ = yypact_[yystate_]; - if (yypact_ninf_ < yyn_ && yyn_ < yylast_) + if (yychar <= yyeof_) + { + /* Return failure if at end of input. */ + if (yychar == yyeof_) + YYABORT; + } + else + { + yy_destroy_ ("Error: discarding", yyla); + yychar = yyempty_; + } + } + + /* Else will try to reuse lookahead token after shifting the error + token. */ + goto yyerrlab1; + + + /*---------------------------------------------------. + | yyerrorlab -- error raised explicitly by YYERROR. | + `---------------------------------------------------*/ + yyerrorlab: + + /* Pacify compilers like GCC when the user code never invokes + YYERROR and the label yyerrorlab therefore never appears in user + code. */ + if (false) + goto yyerrorlab; + + yyerror_range[0].location = yystack_[yylen - 1].location; + /* Do not reclaim the symbols of the rule which action triggered + this YYERROR. */ + yypop_ (yylen); + yylen = 0; + yystate = yystack_[0].state; + goto yyerrlab1; + + /*-------------------------------------------------------------. + | yyerrlab1 -- common code for both syntax error and YYERROR. | + `-------------------------------------------------------------*/ + yyerrlab1: + yyerrstatus_ = 3; /* Each real token shifted decrements this. */ { - /* 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) + stack_symbol_type error_token; + for (;;) { - count = 0; - for (int x = yyxbegin; x < yyxend; ++x) - if (yycheck_[x + yyn_] == x && x != yyterror_) - { - res += (!count++) ? ", expecting " : " or "; - res += yytnamerr_ (yytname_[x]); - } + yyn = yypact_[yystate]; + if (yyn != yypact_ninf_) + { + yyn += yyterror_; + if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_) + { + yyn = yytable_[yyn]; + if (0 < yyn) + break; + } + } + + // Pop the current state because it cannot handle the error token. + if (yystack_.size () == 1) + YYABORT; + + yyerror_range[0].location = yystack_[0].location; + yy_destroy_ ("Error: popping", yystack_[0]); + yypop_ (); + yystate = yystack_[0].state; + YY_STACK_PRINT (); } + + yyerror_range[1].location = yyla.location; + YYLLOC_DEFAULT (error_token.location, (yyerror_range - 1), 2); + + /* Shift the error token. */ + error_token.state = yystate = yyn; + yypush_ ("Shifting", error_token); } - else + goto yynewstate; + + /* Accept. */ + yyacceptlab: + yyresult = 0; + goto yyreturn; + + /* Abort. */ + yyabortlab: + yyresult = 1; + goto yyreturn; + + yyreturn: + if (yychar != 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; + } + + // Generate an error message. + std::string + ]b4_parser_class_name[::yysyntax_error_ (int yystate, int]dnl +b4_error_verbose_if([ tok])[) + { + std::string res; + YYUSE (yystate); +#if YYERROR_VERBOSE + int yyn = yypact_[yystate]; + if (yypact_ninf_ < yyn && yyn <= yylast_) + { + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. */ + int yyxbegin = yyn < 0 ? -yyn : 0; + + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = yylast_ - yyn + 1; + int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_; + int count = 0; + for (int x = yyxbegin; x < yyxend; ++x) + if (yycheck_[x + yyn] == x && x != yyterror_) + ++count; + + // FIXME: This method of building the message is not compatible + // with internationalization. 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[ -}; + 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) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; + ]b4_table_define([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. */ + ]b4_table_define([defact], [b4_defact])[; + + /* YYPGOTO[NTERM-NUM]. */ + ]b4_table_define([pgoto], [b4_pgoto])[; + + /* YYDEFGOTO[NTERM-NUM]. */ + ]b4_table_define([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) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; + ]b4_table_define([table], [b4_table])[; + + /* YYCHECK. */ + ]b4_table_define([check], [b4_check])[; + + /* STOS_[STATE-NUM] -- The (internal number of the) accessing + symbol of state STATE-NUM. */ + ]b4_table_define([stos], [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[ -}; + /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding + to YYLEX-NUM. */ + ]b4_table_define([token_number], [b4_toknum])[; #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[ -}; + /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ + ]b4_table_define([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[::yyr2_[] = -{ - ]b4_r2[ -}; + /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ + ]b4_table_define([r2], [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_[] = -{ + /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. + First, the terminals, then, starting at \a yyntokens_, nonterminals. */ + const char* + const ]b4_parser_class_name[::yytname_[] = + { ]b4_tname[ -}; + }; #endif #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; -} + /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ + ]b4_table_define([rline], [b4_rline])[; + + // Print the state stack on the debug stream. + void + ]b4_parser_class_name[::yystack_print_ () + { + *yycdebug_ << "Stack now"; + for (stack_type::const_iterator + i = yystack_.begin (), + i_end = yystack_.end (); + i != i_end; ++i) + *yycdebug_ << ' ' << i->state; + *yycdebug_ << std::endl; + } + + // Report on the debug stream that the rule \a yyrule is going to be reduced. + void + ]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 // 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[] = + /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ + ]b4_parser_class_name[::token_number_type + ]b4_parser_class_name[::yytranslate_ (int t) { - ]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])[ + static + const token_number_type + translate_table[] = + { +]b4_translate[ + }; + const unsigned int user_token_number_max_ = ]b4_user_token_number_max[; + const token_number_type undef_token_ = ]b4_undef_token_number[; + + if (static_cast (t) <= user_token_number_max_) + return translate_table[t]; + else + return undef_token_; + } + +]b4_namespace_close[ + +]b4_epilogue[]dnl +@output(b4_dir_prefix[]stack.hh@)@ +b4_copyright([Stack handling for Bison parsers in C++])[ #ifndef BISON_STACK_HH # define BISON_STACK_HH #include -namespace yy -{ +]b4_namespace_open[ template > class stack { @@ -1090,17 +1600,17 @@ namespace yy } inline - unsigned int - height () const + typename S::size_type + size () const { return seq_.size (); } inline const_iterator begin () const { return seq_.rbegin (); } - inline const_iterator end () const { return seq_.rend (); } + inline const_iterator end () const { return seq_.rend (); } private: - + /// The wrapped container. S seq_; }; @@ -1128,230 +1638,9 @@ namespace yy const S& stack_; unsigned int range_; }; -} - -#endif // not BISON_STACK_HH] -dnl -@output position.hh -b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ - -/** - ** \file position.hh - ** Define the position class. - */ - -#ifndef BISON_POSITION_HH -# define BISON_POSITION_HH - -# include -# include - -namespace yy -{ - /// Abstract a position. - class position - { - public: - /// Initial column number. - static const unsigned int initial_column = 0; - /// Initial line number. - static const unsigned int initial_line = 1; - - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a position. - position () : - filename (0), - line (initial_line), - column (initial_column) - { - } - /** \} */ - - - /** \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; - } - - /// (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; - } - /** \} */ - - 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) - { - res.columns (width); - return res; - } - - /// Add two position objects. - inline const position - operator+ (const position& begin, const int width) - { - position res = begin; - return res += width; - } - - /// Add and assign a position. - inline const position& - operator-= (position& res, const int width) - { - return res += -width; - } - - /// Add two position objects. - inline const position - operator- (const position& begin, const int width) - { - return begin + -width; - } - - /** \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) - { - if (pos.filename) - ostr << *pos.filename << ':'; - return ostr << pos.line << '.' << pos.column; - } - -} -#endif // not BISON_POSITION_HH] -@output location.hh -b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[ - -/** - ** \file location.hh - ** Define the location class. - */ - -#ifndef BISON_LOCATION_HH -# define BISON_LOCATION_HH - -# include -# include -# include "position.hh" - -namespace yy -{ - - /// Abstract a location. - class location - { - /** \name Ctor & dtor. - ** \{ */ - public: - /// Construct a location. - location () : - begin (), - end () - { - } - /** \} */ - - - /** \name Line and Column related manipulators - ** \{ */ - public: - /// Reset initial location to final location. - inline void step () - { - begin = end; - } - - /// Extend the current location to the COUNT next columns. - inline void columns (unsigned int count = 1) - { - end += count; - } - - /// Extend the current location to the COUNT next lines. - inline void lines (unsigned int count = 1) - { - end.lines (count); - } - /** \} */ - - - public: - /// Beginning of the located region. - position begin; - /// End of the located region. - position end; - }; - - /// Join two location objects to create a location. - inline const location operator+ (const location& begin, const location& end) - { - location res = begin; - res.end = end.end; - return res; - } - - /// Add two location objects. - inline const location operator+ (const location& begin, unsigned int width) - { - location res = begin; - res.columns (width); - return res; - } - - /// Add and assign a location. - inline location& operator+= (location& res, unsigned int width) - { - res.columns (width); - return res; - } - - /** \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) - { - 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; - } - -} +]b4_namespace_close[ -#endif // not BISON_LOCATION_HH] +#endif // not BISON_STACK_HH[]dnl +] +m4_divert_pop(0) +m4_popdef([b4_copyright_years])dnl