X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6dde1c82cd2961df2fcb508b694d64b4d485f279..2935744b3a563ff41d9cc7e6c21ffb4e86767717:/data/lalr1.cc?ds=sidebyside diff --git a/data/lalr1.cc b/data/lalr1.cc index 00090e7a..6a67c5b8 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,41 +1,49 @@ -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, 2003, 2004, 2005, 2006, 2007, 2008 +# 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 - -## ---------------- ## -## Default values. ## -## ---------------- ## - -# Default Parser class name. -m4_define_default([b4_parser_class_name], [Parser]) +# 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 +]) -## ----------------- ## -## Semantic Values. ## -## ----------------- ## +# 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_variant_if -# b4_lhs_value([TYPE]) -# -------------------- -# Expansion of $$. -m4_define([b4_lhs_value], -[yyval[]m4_ifval([$1], [.$1])]) +# b4_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT]) +# ---------------------------------------------------- +m4_define([b4_assert_if], +[b4_percent_define_ifdef([[assert]], [$1], [$2])]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) @@ -43,929 +51,1233 @@ 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([yystack_@{($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], -[location_stack_@{m4_eval([$1 - $2])@}]) - - -m4_define([b4_inherit], - [m4_ifdef([b4_root], - [: public b4_root -], - [])]) - -m4_define([b4_param], - [m4_ifdef([b4_root], - [, - const Param& param], - [])]) - -m4_define([b4_constructor], - [m4_ifdef([b4_root], - [b4_root (param), - ], - [])]) - - -# 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;]) +[yystack_@{($1) - ($2)@}.location]) + + +# 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([yyvalue], [$6])])dnl +m4_pushdef([b4_at_dollar], [yylocation])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_action_(SYMBOL-TAG, SYMBOL-NUM, SYMBOL-TYPENAME) +# ---------------------------------------------------------- +# Invoke b4_dollar_dollar(SYMBOL_TYPENAME) for each symbol. +m4_define([b4_symbol_action_], +[m4_ifval($3, +[ case $2: // $1 + b4_dollar_dollar($@); + break; +])]) + + +# 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_symbol_action_], m4_defn([b4_type_names])) + 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-TAG, SYMBOL-NUM, SYMBOL-TYPENAME) +# ------------------------------------------------------- +# 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($3, +[ + char _b4_char_sizeof_dummy@{sizeof($3)@}; // $1])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])[ -/* 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 -#include "stack.hh" -#include "location.hh" +]b4_percent_code_get([[requires]])[ +]b4_assert_if([#include ])[ #include #include +#include "stack.hh" + +]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; + + /// Initially uninitialized. + variant () + : built(false) + {}])[ + + /// Instantiate a \a T in here. + template + inline T& + build() + {]b4_assert_if([ + assert(!built); + built = true;])[ + return *new (buffer) T; + } -/* Using locations. */ -#define YYLSP_NEEDED ]b4_locations_flag[ + /// Accessor to a built \a T. + template + inline T& + as() + {]b4_assert_if([ + assert(built);])[ + return reinterpret_cast(buffer); + } -]b4_token_defines(b4_tokens)[ + /// Const accessor to a built \a T (for %printer). + template + inline const T& + as() const + {]b4_assert_if([ + assert(built);])[ + return reinterpret_cast(buffer); + } -/* Copy the first part of user declarations. */ -]b4_pre_prologue[ + /// Swap the content with \a other. + template + inline void + swap(variant& other) + { + std::swap(as(), other.as()); + } -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + /// 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 "location.hh" /* Enabling traces. */ #ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ +# define YYDEBUG ]b4_debug_flag[ #endif -/* Enabling verbose error message. */ -#ifndef YYERROR_VERBOSE -# define YYERROR_VERBOSE ]b4_error_verbose[ -#endif - -#ifdef YYSTYPE -typedef YYSTYPE yystype; +/* Enabling verbose error messages. */ +#ifdef YYERROR_VERBOSE +# undef YYERROR_VERBOSE +# define YYERROR_VERBOSE 1 #else -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_filename]) -typedef union b4_stype yystype; -/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])], -[typedef int yystype;])[ -# define YYSTYPE yystype +# define YYERROR_VERBOSE ]b4_error_verbose_flag[ #endif -/* Copy the second part of user declarations. */ -]b4_post_prologue[ +/* Enabling the token table. */ +#ifndef YYTOKEN_TABLE +# define YYTOKEN_TABLE ]b4_token_table[ +#endif -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ -/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. */ +/* 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 { \ - ((Current).begin = (Rhs)[1].begin); \ - ((Current).end = (Rhs)[N].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[; - - template < typename P > - struct Traits - { - }; - - template < > - struct Traits< ]b4_parser_class_name[ > - { - typedef ]b4_int_type_for([b4_translate])[ TokenNumberType; - typedef ]b4_int_type_for([b4_rhs])[ RhsNumberType; - typedef int StateType; - typedef yystype SemanticType; - typedef ]b4_location_type[ LocationType; - }; -} +]b4_namespace_open[ -namespace yy -{ - class ]b4_parser_class_name b4_inherit[ + /// A Bison parser. + class ]b4_parser_class_name[ { public: - - typedef Traits< ]b4_parser_class_name[ >::TokenNumberType TokenNumberType; - typedef Traits< ]b4_parser_class_name[ >::RhsNumberType RhsNumberType; - typedef Traits< ]b4_parser_class_name[ >::StateType StateType; - typedef Traits< ]b4_parser_class_name[ >::SemanticType SemanticType; - typedef Traits< ]b4_parser_class_name[ >::LocationType LocationType; - - typedef Stack< StateType > StateStack; - typedef Stack< SemanticType > SemanticStack; - typedef Stack< LocationType > LocationStack; - - ]b4_parser_class_name[ (bool debug][]b4_param[]b4_parse_param_decl[) : - ]b4_constructor[][debug_ (debug), - cdebug_ (std::cerr)]b4_parse_param_cons[ +#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_type_names]))[ + }; + + /// Symbol semantic values. + 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 ]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. + void set_debug_stream (std::ostream &); + + /// Type for debugging levels. + typedef int debug_level_type; + /// The current debugging level. + debug_level_type debug_level () const; + /// Set the current debugging level. + void set_debug_level (debug_level_type l); +#endif + private: + /// Report a syntax error. + /// \param loc where the syntax error is found. + /// \param msg a description of the syntax error. + virtual void error (const location_type& loc, const std::string& msg); - virtual void lex_ (); - virtual void error_ (); - virtual void print_ (); - virtual void report_syntax_error_ (); -#if YYDEBUG - virtual void symprint_ (int yytype, - const SemanticType *yyvaluep, - const LocationType *yylocationp); -#endif /* ! YYDEBUG */ + /// Generate an error message. + /// \param state the state where the error occurred. + /// \param tok the lookahead token. + virtual std::string yysyntax_error_ (int yystate, int tok); +#if YYDEBUG + /// \brief Report a symbol value on the debug stream. + /// \param yytype The token type. + /// \param yyvalue Its semantic value. + /// \param yylocation Its location. + virtual void yy_symbol_value_print_ (int yytype, + const semantic_type& yyvalue, + const location_type& yylocation); + /// \brief Report a symbol on the debug stream. + /// \param yytype The token type. + /// \param yyvalue Its semantic value. + /// \param yylocation Its location. + virtual void yy_symbol_print_ (int yytype, + const semantic_type& yyvalue, + const location_type& yylocation); +#endif - /* Stacks. */ - StateStack state_stack_; - SemanticStack semantic_stack_; - LocationStack location_stack_; + /// State numbers. + typedef int state_type; + /// Internal symbol numbers. + typedef ]b4_int_type_for([b4_translate])[ token_number_type; /* Tables. */ - static const ]b4_int_type_for([b4_pact])[ pact_[]; - static const ]b4_int_type(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_[]; + /// For a state, the index in \a yytable_ of its portion. + static const ]b4_int_type_for([b4_pact])[ yypact_[]; + static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_; + + /// For a state, default rule to reduce. + /// Unless\a yytable_ specifies something else to do. + /// Zero means the default is an error. + static const ]b4_int_type_for([b4_defact])[ yydefact_[]; + + static const ]b4_int_type_for([b4_pgoto])[ yypgoto_[]; + static const ]b4_int_type_for([b4_defgoto])[ yydefgoto_[]; + + /// What to do in a state. + /// \a yytable_[yypact_[s]]: what to do in state \a s. + /// - if positive, shift that token. + /// - if negative, reduce the rule which number is the opposite. + /// - if zero, do what YYDEFACT says. + static const ]b4_int_type_for([b4_table])[ yytable_[]; + static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_; + + static const ]b4_int_type_for([b4_check])[ yycheck_[]; + + /// For a state, its accessing symbol. + static const ]b4_int_type_for([b4_stos])[ yystos_[]; + + /// For a rule, its LHS. + static const ]b4_int_type_for([b4_r1])[ yyr1_[]; + /// For a rule, its RHS length. + static const ]b4_int_type_for([b4_r2])[ yyr2_[]; + +#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE + /// For a symbol, its name in clear. + static const char* const yytname_[]; +#endif + +#if YYERROR_VERBOSE + /// Convert the symbol name \a n to a form suitable for a diagnostic. + virtual std::string yytnamerr_ (const char *n); #endif - /* More tables, for debugging. */ #if YYDEBUG - static const RhsNumberType rhs_[]; - static const ]b4_int_type_for([b4_prhs])[ prhs_[]; - static const ]b4_int_type_for([b4_rline])[ rline_[]; - static const ]b4_int_type_for([b4_toknum])[ token_number_[]; - virtual void reduce_print_ (int yyrule); - virtual void stack_print_ (); + /// A `-1'-separated list of the rules' RHS. + static const ]b4_int_type_for([b4_rhs])[ yyrhs_[]; + /// For each rule, the index of the first RHS symbol in \a yyrhs_. + static const ]b4_int_type_for([b4_prhs])[ yyprhs_[]; + /// For each rule, its source line number. + static const ]b4_int_type_for([b4_rline])[ yyrline_[]; + /// For each scanner token number, its symbol number. + static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[]; + /// Report on the debug stream that the rule \a r is going to be reduced. + virtual void yy_reduce_print_ (int r); + /// Print the state stack on the debug stream. + virtual void yystack_print_ (); + + /* Debugging. */ + int yydebug_; + std::ostream* yycdebug_; #endif - /* Even more tables. */ - inline TokenNumberType translate_ (int token); - inline void destruct_ (const char *yymsg, - int yytype, - SemanticType *yyvaluep, LocationType *yylocationp); + /// Convert a scanner token number \a t to a symbol number. + token_number_type yytranslate_ (int t); + + /// \brief Reclaim the memory associated to a symbol. + /// \param yymsg Why this token is reclaimed. + /// If null, nothing is printed at all. + /// \param yytype The symbol type. + /// \param yyvalue Its semantic value. + /// \param yylocation Its location. + inline void yydestruct_ (const char* yymsg, + int yytype, + semantic_type& yyvalue, + location_type& yylocation); + + /// Element of the stack: a state and its attributes. + struct data_type + { + /// Default constructor. + data_type (); - /// Pop \a n symbols the three stacks. - inline void pop (unsigned int n = 1); + /// Constructor. + data_type (state_type s, const semantic_type& v, const location_type& l); - /* 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_; + /// The state. + state_type state; - /* State. */ - int n_; - int len_; - int state_; + /// The semantic value. + semantic_type value; - /* Error handling. */ - int nerrs_; - int errstatus_; + /// The location. + location_type location; + }; - /* Debugging. */ - int debug_; - std::ostream &cdebug_; + /// Stack type. + typedef stack stack_type; - /* Look-ahead and look-ahead in internal form. */ - int looka_; - int ilooka_; + /// The stack. + stack_type yystack_; - /* Message. */ - std::string message; + /// Push a new state on the stack. + /// \param m a debug message to display + /// if null, no trace is output. + /// \param s the state entered + /// \param v semantic value + /// \param l location + /// \warning the contents of \a v is stolen. + inline void yypush_ (const char* m, state_type s, + semantic_type& v, const location_type& l); - /// 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]; + /// Pop \a n symbols the three stacks. + inline void yypop_ (unsigned int n = 1); - /// $$. - SemanticType yyval; - /// @@$. - LocationType yyloc; + /* 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_; ]b4_parse_param_vars[ }; -} +]b4_namespace_close[ + +]b4_percent_define_flag_if([[global_tokens_and_yystype]], +[b4_token_defines(b4_tokens) -#endif /* ! defined PARSER_HEADER_H */] +#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 */] ])dnl -@output @output_parser_name@ -b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison], - [2002, 2003, 2004]) +@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 + +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 */ +# define YY_(msgid) dgettext ("bison-runtime", msgid) +# endif +# endif +# ifndef YY_ +# define YY_(msgid) msgid +# endif +#endif -m4_if(b4_defines_flag, 0, [], [#include @output_header_name@])[ +/* Suppress unused-variable warnings by "using" E. */ +#define YYUSE(e) ((void) (e)) /* Enable debugging if requested. */ #if YYDEBUG -# define YYCDEBUG \ - if (debug_) \ - cdebug_ +/* A pseudo ostream that takes yydebug_ into account. */ +# define YYCDEBUG if (yydebug_) (*yycdebug_) # define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ -do { \ - if (debug_) \ + do { \ + if (yydebug_) \ { \ - cdebug_ << (Title) << ' '; \ - symprint_ ((Type), (Value), (Location)); \ - cdebug_ << std::endl; \ + *yycdebug_ << Title << ' '; \ + yy_symbol_print_ ((Type), (Value), (Location)); \ + *yycdebug_ << std::endl; \ } \ -} while (0) + } while (false) # define YY_REDUCE_PRINT(Rule) \ -do { \ - if (debug_) \ - reduce_print_ (Rule); \ -} while (0) + do { \ + if (yydebug_) \ + yy_reduce_print_ (Rule); \ + } while (false) # define YY_STACK_PRINT() \ -do { \ - if (debug_) \ - stack_print_ (); \ -} while (0) + do { \ + if (yydebug_) \ + yystack_print_ (); \ + } while (false) #else /* !YYDEBUG */ -# define YYCDEBUG if (0) cdebug_ -# 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, Type, Value, Location) 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_) -#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; - - cdebug_ << (yytype < ntokens_ ? "token" : "nterm") - << ' ' << name_[yytype] << " (" - << *yylocationp << ": "; - switch (yytype) - { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl -[ default: - break; - } - cdebug_ << ')'; -} -#endif /* ! YYDEBUG */ +]b4_namespace_open[ +#if YYERROR_VERBOSE -void -yy::]b4_parser_class_name[::destruct_ (const char *yymsg, - int yytype, SemanticType *yyvaluep, LocationType *yylocationp) -{ - /* Pacify ``unused variable'' warnings. */ - (void) yyvaluep; - (void) yylocationp; + /* 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; + } - YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); +#endif - switch (yytype) - { -]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ - default: - break; - } -} + /// 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[ + { + } -void -yy::]b4_parser_class_name[::pop (unsigned int n) -{ - state_stack_.pop (n); - semantic_stack_.pop (n); - location_stack_.pop (n); -} + ]b4_parser_class_name::~b4_parser_class_name[ () + { + } -int -yy::]b4_parser_class_name[::parse () -{ - YYCDEBUG << "Starting parse" << std::endl; +#if YYDEBUG + /*--------------------------------. + | Print this symbol on YYOUTPUT. | + `--------------------------------*/ - nerrs_ = 0; - errstatus_ = 0; + inline void + ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype, + const semantic_type& yyvalue, const location_type& yylocation) + { + YYUSE (yylocation); + YYUSE (yyvalue); + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl +[ default: + break; + } + } - /* Start. */ - state_ = 0; - looka_ = empty_; -]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_) - { - YYCDEBUG << "Reading a token: "; - lex_ (); - } - - /* 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); - } + void + ]b4_parser_class_name[::yy_symbol_print_ (int yytype, + const semantic_type& yyvalue, const location_type& yylocation) + { + *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") + << ' ' << yytname_[yytype] << " (" + << yylocation << ": "; + yy_symbol_value_print_ (yytype, yyvalue, yylocation); + *yycdebug_ << ')'; + } +#endif - /* 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; + void + ]b4_parser_class_name[::yydestruct_ (const char* yymsg, + int yytype, semantic_type& yyvalue, location_type& yylocation) + { + YYUSE (yymsg); + YYUSE (yyvalue); + YYUSE (yylocation); + + if (yymsg) + YY_SYMBOL_PRINT (yymsg, yytype, yyvalue, yylocation); + + // User destructor. + switch (yytype) + { + ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ + default: + break; + }]b4_variant_if([ + + // Type destructor. + b4_symbol_variant([[yytype]], [[yyvalue]], [[destroy]])])[ + } - /* 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]; - yyloc = location_stack_[len_ - 1]; - } - else - { - yyval = semantic_stack_[0]; - yyloc = location_stack_[0]; - } + ]b4_parser_class_name[::data_type::data_type () + : state() + , value() + , location() + { + } - if (len_) - { - Slice< LocationType, LocationStack > slice (location_stack_, len_); - YYLLOC_DEFAULT (yyloc, slice, len_); - } - YY_REDUCE_PRINT (n_); - switch (n_) - { - ]b4_actions[ - } + ]b4_parser_class_name[::data_type::data_type (state_type s, + const semantic_type& v, const location_type& l) + : state(s) + , value(v) + , location(l) + { + } -]/* Line __line__ of lalr1.cc. */ -b4_syncline([@oline@], [@ofile@])[ + void + ]b4_parser_class_name[::yypush_ (const char* m, state_type s, + semantic_type& v, const location_type& l) + { + if (m) + YY_SYMBOL_PRINT (m, yystos_[s], v, l); +]b4_variant_if( +[[ yystack_.push (data_type (s, semantic_type(), l)); + ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]], [build], [v])], +[ yystack_.push (data_type (s, v, l));])[ + } - pop (len_); + void + ]b4_parser_class_name[::yypop_ (unsigned int n) + { + yystack_.pop (n); + } - YY_STACK_PRINT (); +#if YYDEBUG + std::ostream& + ]b4_parser_class_name[::debug_stream () const + { + return *yycdebug_; + } - semantic_stack_.push (yyval); - location_stack_.push (yyloc); + void + ]b4_parser_class_name[::set_debug_stream (std::ostream& o) + { + yycdebug_ = &o; + } - /* 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; -/*------------------------------------. -| yyerrlab -- here on detecting error | -`------------------------------------*/ -yyerrlab: - /* If not already recovering from an error, report this error. */ - report_syntax_error_ (); + ]b4_parser_class_name[::debug_level_type + ]b4_parser_class_name[::debug_level () const + { + return yydebug_; + } - error_range_[0] = location; - if (errstatus_ == 3) - { - /* If just tried and failed to reuse look-ahead token after an - error, discard it. */ + void + ]b4_parser_class_name[::set_debug_level (debug_level_type l) + { + yydebug_ = l; + } +#endif - /* 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_; - } - } + int + ]b4_parser_class_name[::parse () + { + /// Lookahead and lookahead in internal form. + int yychar = yyempty_; + int yytoken = 0; - /* Else will try to reuse look-ahead token after shifting the error - token. */ - goto yyerrlab1; + /* State. */ + int yyn; + int yylen = 0; + int yystate = 0; + + /* Error handling. */ + int yynerrs_ = 0; + int yyerrstatus_ = 0; + + /// Semantic value of the lookahead. + semantic_type yylval; + /// Location of the lookahead. + location_type yylloc; + /// The locations where the error started and ended. + data_type yyerror_range[2]; + /// $$. + semantic_type yyval; + /// @@$. + location_type yyloc; -/*---------------------------------------------------. -| yyerrorlab -- error raised explicitly by YYERROR. | -`---------------------------------------------------*/ -yyerrorlab: + int yyresult; -#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 + YYCDEBUG << "Starting parse" << std::endl; - error_range_[0] = location_stack_[len_ - 1]; - pop (len_); - state_ = state_stack_[0]; - goto yyerrlab1; +]m4_ifdef([b4_initial_action], [ +m4_pushdef([b4_at_dollar], [yylloc])dnl +m4_pushdef([b4_dollar_dollar], [yylval])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, yystate, yylval, yylloc); + + // 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*], [&yylval]][]dnl +b4_locations_if([, [[location*], [&yylloc]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; + } + + + /* Convert token to internal form. */ + if (yychar <= yyeof_) + { + yychar = yytoken = yyeof_; + YYCDEBUG << "Now at end of input." << std::endl; + } + else + { + yytoken = yytranslate_ (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, yylval, yylloc); + } + + /* If the proper action on seeing token YYTOKEN is to reduce or to + detect an error, take that action. */ + yyn += yytoken; + if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken) + goto yydefault; + + /* Reduce or error. */ + yyn = yytable_[yyn]; + if (yyn <= 0) + { + if (yyn == 0 || yyn == yytable_ninf_) + goto yyerrlab; + yyn = -yyn; + goto yyreduce; + } + + /* 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, yylval, yylloc); + 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 $$=$1 rule is NOT applied when using + variants */ + ]b4_symbol_variant([[yyr1_@{yyn@}]], [yyval], [build])[],[ + /* If YYLEN is nonzero, implement the default value of the action: + `$$ = $1'. Otherwise, use the top of the stack. + + Otherwise, the following line sets YYVAL to garbage. + This behavior is undocumented and Bison + users should not rely upon it. */ + if (yylen) + yyval = yystack_@{yylen - 1@}.value; + else + yyval = yystack_@{0@}.value;])[ + + // Compute the default @@$. + { + slice slice (yystack_, yylen); + YYLLOC_DEFAULT (yyloc, slice, yylen); + } -/*-------------------------------------------------------------. -| yyerrlab1 -- common code for both syntax error and YYERROR. | -`-------------------------------------------------------------*/ -yyerrlab1: - errstatus_ = 3; /* Each real token shifted decrements this. */ + // Perform the reduction. + YY_REDUCE_PRINT (yyn); + switch (yyn) + { + ]b4_user_actions[ + default: + break; + } + YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], yyval, yyloc); +]b4_variant_if([[ + // Destroy the lhs symbols. + for (int i = 0; i < yylen; ++i) + // Destroy a variant which value may have be swapped with yyval. + // The value of yyval (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. + yydestruct_ (0, + yystos_[yystack_[i].state], + yystack_[i].value, yystack_[i].location);]])[ + + yypop_ (yylen); + yylen = 0; + YY_STACK_PRINT (); + + /* Shift the result of the reduction. */ + yyn = yyr1_[yyn]; + yystate = yypgoto_[yyn - yyntokens_] + yystack_[0].state; + if (0 <= yystate && yystate <= yylast_ + && yycheck_[yystate] == yystack_[0].state) + yystate = yytable_[yystate]; + else + yystate = yydefgoto_[yyn - yyntokens_]; + yypush_ (0, yystate, yyval, yyloc); + goto yynewstate; + + /*------------------------------------. + | yyerrlab -- here on detecting error | + `------------------------------------*/ + yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus_) + { + ++yynerrs_; + error (yylloc, yysyntax_error_ (yystate, yytoken)); + } + + yyerror_range[0].location = yylloc; + if (yyerrstatus_ == 3) + { + /* If just tried and failed to reuse lookahead token after an + error, discard it. */ - for (;;) - { - n_ = pact_[state_]; - if (n_ != pact_ninf_) + if (yychar <= yyeof_) + { + /* Return failure if at end of input. */ + if (yychar == yyeof_) + YYABORT; + } + else + { + yydestruct_ ("Error: discarding", yytoken, yylval, yylloc); + yychar = yyempty_; + } + } + + /* Else will try to reuse 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. */ + + for (;;) + { + yyn = yypact_[yystate]; + if (yyn != yypact_ninf_) { - n_ += terror_; - if (0 <= n_ && n_ <= last_ && check_[n_] == terror_) + yyn += yyterror_; + if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_) { - n_ = table_[n_]; - if (0 < n_) + yyn = yytable_[yyn]; + if (0 < yyn) 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 (); - } - - 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[::lex_ () -{ -#if YYLSP_NEEDED - looka_ = yylex (&value, &location); -#else - looka_ = yylex (&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_; + // Pop the current state because it cannot handle the error token. + if (yystack_.size () == 1) + YYABORT; + + yyerror_range[0].location = yystack_[0].location; + yydestruct_ ("Error: popping", + yystos_[yystate], + yystack_[0].value, yystack_[0].location); + yypop_ (); + yystate = yystack_[0].state; + YY_STACK_PRINT (); + } + + yyerror_range[1].location = yylloc; + // Using YYLLOC is tempting, but would change the location of + // the lookahead. YYLOC is available though. + YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2); + + /* Shift the error token. */ + yystate = yyn; + yypush_ ("Shifting", yystate, yylval, yyloc); + goto yynewstate; + + /* Accept. */ + yyacceptlab: + yyresult = 0; + goto yyreturn; + + /* Abort. */ + yyabortlab: + yyresult = 1; + goto yyreturn; + + yyreturn: + if (yychar != yyempty_) + yydestruct_ ("Cleanup: discarding lookahead", yytoken, yylval, yylloc); + + /* Do not reclaim the symbols of the rule which action triggered + this YYABORT or YYACCEPT. */ + yypop_ (yylen); + while (yystack_.size () != 1) + { + yydestruct_ ("Cleanup: popping", + yystos_[yystack_[0].state], + yystack_[0].value, yystack_[0].location); + 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 - n_ = pact_[state_]; - if (pact_ninf_ < n_ && n_ < last_) - { - message = "syntax error, unexpected "; - message += name_[ilooka_]; + 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) { - 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]; - } - } + 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 + } + else #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[ -}; + 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 token number corresponding - to YYLEX-NUM. */ -const ]b4_int_type_for([b4_toknum])[ -yy::]b4_parser_class_name[::token_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[::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_[] = -{ + /* 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. */ + ]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 ]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[::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_ () -{ - cdebug_ << "Stack now"; - for (StateStack::const_iterator i = state_stack_.begin (); - i != state_stack_.end (); ++i) - cdebug_ << ' ' << *i; - cdebug_ << 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. */ - cdebug_ << "Reducing stack by rule " << n_ - 1 << " (line " << yylno << "), "; - for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_]; - 0 <= rhs_[i]; ++i) - cdebug_ << name_[rhs_[i]] << ' '; - cdebug_ << "-> " << name_[r1_[n_]] << std::endl; -} + /* YYRHS -- A `-1'-separated list of the rules' RHS. */ + ]b4_table_define([rhs], [b4_rhs])[; + + /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in + YYRHS. */ + ]b4_table_define([prhs], [b4_prhs])[; + + /* 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 << " =", + yyrhs_[yyprhs_[yyrule] + yyi], + ]b4_rhs_value(yynrhs, yyi + 1)[, + ]b4_rhs_location(yynrhs, yyi + 1)[); + } #endif // YYDEBUG -/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ -yy::]b4_parser_class_name[::TokenNumberType -yy::]b4_parser_class_name[::translate_ (int token) -{ - static - const TokenNumberType - 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 <= 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])[ + static + const token_number_type + translate_table[] = + { + ]b4_translate[ + }; + if ((unsigned int) t <= yyuser_token_number_max_) + return translate_table[t]; + else + return yyundef_token_; + } + + const int ]b4_parser_class_name[::yyeof_ = 0; + const int ]b4_parser_class_name[::yylast_ = ]b4_last[; + const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; + const int ]b4_parser_class_name[::yyempty_ = -2; + const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; + const int ]b4_parser_class_name[::yyterror_ = 1; + const int ]b4_parser_class_name[::yyerrcode_ = 256; + const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[; + + const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; + const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; + +]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 -{ - template < class T, class S = std::deque< T > > - class Stack +]b4_namespace_open[ + template > + class stack { public: @@ -973,11 +1285,11 @@ namespace yy typedef typename S::reverse_iterator iterator; typedef typename S::const_reverse_iterator const_iterator; - Stack () : seq_ () + stack () : seq_ () { } - Stack (unsigned int n) : seq_ (n) + stack (unsigned int n) : seq_ (n) { } @@ -1011,26 +1323,27 @@ 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_; }; - template < class T, class S = Stack< T > > - class Slice + /// Present a slice of the top of a stack. + template > + class slice { public: - Slice (const S& stack, + slice (const S& stack, unsigned int range) : stack_ (stack), range_ (range) { @@ -1048,228 +1361,9 @@ 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])[ - -/** - ** \file position.hh - ** Define the Location class. - */ - -#ifndef BISON_POSITION_HH -# define BISON_POSITION_HH - -# include -# include - -namespace yy -{ - /** \brief Abstract a Position. */ - class Position - { - public: - /** \brief Initial column number. */ - static const unsigned int initial_column = 0; - /** \brief Initial line number. */ - static const unsigned int initial_line = 1; - - /** \name Ctor & dtor. - ** \{ */ - public: - /** \brief Construct a Position. */ - Position () : - filename (), - line (initial_line), - column (initial_column) - { - } - /** \} */ - - - /** \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; - } - - /** \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; - } - /** \} */ - - 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; - }; - - /** \brief Add and assign a Position. */ - inline const Position& - operator+= (Position& res, const int width) - { - res.columns (width); - return res; - } - - /** \brief Add two Position objects. */ - inline const Position - operator+ (const Position& begin, const int width) - { - Position res = begin; - return res += width; - } - - /** \brief Add and assign a Position. */ - inline const Position& - operator-= (Position& res, const int width) - { - return res += -width; - } - - /** \brief 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.empty ()) - 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])[ - -/** - ** \file location.hh - ** Define the Location class. - */ - -#ifndef BISON_LOCATION_HH -# define BISON_LOCATION_HH - -# include -# include -# include "position.hh" - -namespace yy -{ - - /** \brief Abstract a Location. */ - class Location - { - /** \name Ctor & dtor. - ** \{ */ - public: - /** \brief Construct a Location. */ - Location (void) : - begin (), - end () - { - } - /** \} */ - - - /** \name Line and Column related manipulators - ** \{ */ - public: - /** \brief Reset initial location to final location. */ - inline void step (void) - { - begin = end; - } - - /** \brief Extend the current location to the COUNT next columns. */ - inline void columns (unsigned int count = 1) - { - end += count; - } - - /** \brief Extend the current location to the COUNT next lines. */ - inline void lines (unsigned int count = 1) - { - end.lines (count); - } - /** \} */ - - - public: - /** \brief Beginning of the located region. */ - Position begin; - /** \brief End of the located region. */ - Position end; - }; - - /** \brief 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; - } - - /** \brief Add two Location objects */ - inline const Location operator+ (const Location& begin, unsigned int width) - { - Location res = begin; - res.columns (width); - return res; - } - - /** \brief 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 (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