X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6afc30cc8763e690a1f9b8aa21fbc7b72244b5c6..2c1bf9bd68c361a55ef0130f269a674a4e87996e:/data/lalr1.cc diff --git a/data/lalr1.cc b/data/lalr1.cc index 433c62b3..0ccf2237 100644 --- a/data/lalr1.cc +++ b/data/lalr1.cc @@ -1,44 +1,447 @@ # C++ skeleton for Bison -# Copyright (C) 2002, 2003, 2004, 2005, 2006 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_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT) +# -------------------------------------------------------------- +# Declare "parser::yy_" which contents is CONTENT. +m4_define([b4_integral_parser_table_declare], +[m4_ifval([$3], [b4_c_comment([$3], [ ]) +])dnl + static const b4_int_type_for([$2]) yy$1_[[]];dnl +]) + +# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT) +# --------------------------------------------- +# Define "parser::yy_" which contents is CONTENT. +m4_define([b4_integral_parser_table_define], +[ const b4_int_type_for([$2]) + b4_parser_class_name::yy$1_[[]] = + { + $2 + };dnl +]) + + +# 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_lex_symbol_if([IF-YYLEX-RETURNS-A-COMPLETE-SYMBOL], [IF-NOT]) +# ---------------------------------------------------------------- +m4_define([b4_lex_symbol_if], +[b4_percent_define_ifdef([[lex_symbol]], [$1], [$2])]) + + +# 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_@{b4_subtract($@)@}]) + + +# b4_rhs_state(RULE-LENGTH, NUM) +# ----------------------------- +# The state corresponding to the symbol #NUM, where the current +# rule has RULE-LENGTH symbols on RHS. +m4_define([b4_rhs_state], + [b4_rhs_data([$1], [$2]).state]) + + +# b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) +# -------------------------------------- +# Expansion of $NUM, where the current rule has RULE-LENGTH +# symbols on RHS. +m4_define([b4_rhs_value], + [b4_symbol_value([b4_rhs_data([$1], [$2]).value], [$3])]) + + +# b4_rhs_location(RULE-LENGTH, NUM) +# --------------------------------- +# Expansion of @NUM, where the current rule has RULE-LENGTH symbols +# on RHS. +m4_define([b4_rhs_location], + [b4_rhs_data([$1], [$2]).location]) + + +# b4_symbol_(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(NUM, FIELD) +# --------------------- +# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if +# undefined. If FIELD = id, prepend the prefix. +m4_define([b4_symbol], +[m4_case([$2], + [id], [m4_do([b4_percent_define_get([token.prefix])], + [b4_symbol_([$1], [id])])], + [b4_symbol_($@)])]) + + +# 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], +[m4_map([b4_symbol_case_], [$@])[]dnl + b4_dollar_dollar([b4_symbol([$1], [number])], + [b4_symbol([$1], [tag])], + [b4_symbol([$1], [type])]); + break; + +])]) + + +# b4_symbol_constructor_declaration_(SYMBOL-NUMBER) +# ------------------------------------------------- +# 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_], +[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id], +[ static inline + symbol_type + make_[]b4_symbol_([$1], [id]) (dnl +b4_args(b4_symbol_if([$1], [has_type], + [const b4_symbol([$1], [type])& v]), + b4_locations_if([const location_type& l]))); + +])])]) + + +# b4_symbol_constructor_declarations +# ---------------------------------- +# Declare symbol constructors for all the value types. +# Use at class-level. +m4_define([b4_symbol_constructor_declarations], +[b4_variant_if([ + // Symbol constructors declarations. +m4_map([b4_symbol_constructor_declaration_], m4_defn([b4_symbol_numbers]))])]) + + + +# b4_symbol_constructor_definition_(SYMBOL-NUMBER) +# ------------------------------------------------ +# Define symbol constructor for this SYMBOL-NUMBER. +m4_define([b4_symbol_constructor_definition_], +[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id], +[ b4_parser_class_name::symbol_type + b4_parser_class_name::make_[]b4_symbol_([$1], [id]) (dnl +b4_args(b4_symbol_if([$1], [has_type], + [const b4_symbol([$1], [type])& v]), + b4_locations_if([const location_type& l]))) + { + return symbol_type (b4_args([yytranslate_ (token::b4_symbol([$1], [id]))], + b4_symbol_if([$1], [has_type], [v]), + b4_locations_if([l]))); + } + +])])]) + + +# b4_symbol_constructor_definitions +# ---------------------------------- +# Define the overloaded versions of make_symbol for all the value types. +m4_define([b4_symbol_constructor_definitions], +[[ // symbol_base_type. + template + ]b4_parser_class_name[::symbol_base_type::symbol_base_type () + : value()]b4_locations_if([ + , location()])[ + { + }]b4_locations_if([[ + + 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 (]b4_args( + [const semantic_type& v], + b4_locations_if([const location_type& l]))[) + : value(v)]b4_locations_if([ + , location(l)])[ + { + } + + template + const Exact& + ]b4_parser_class_name[::symbol_base_type::self () const + { + return static_cast(*this); + } + + template + Exact& + ]b4_parser_class_name[::symbol_base_type::self () + { + return static_cast(*this); + } + + template + int + ]b4_parser_class_name[::symbol_base_type::type_get () const + { + return self ().type_get_ (); + } + + // symbol_type. + ]b4_parser_class_name[::symbol_type::symbol_type () + : super_type () + , type () + { + } + + ]b4_parser_class_name[::symbol_type::symbol_type (]b4_args( + [int t], + b4_locations_if([const location_type& l]))[) + : super_type (]b4_locations_if([l])[) + , type (t) + { + } + + ]b4_parser_class_name[::symbol_type::symbol_type (]b4_args( + [int t], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[) + : super_type (v]b4_locations_if([, l])[) + , type (t) + { + } + + int + ]b4_parser_class_name[::symbol_type::type_get_ () const + { + return type; + } +]b4_lex_symbol_if([[ + ]b4_parser_class_name[::token_type + ]b4_parser_class_name[::symbol_type::token () const + { + // YYTOKNUM[NUM] -- (External) token number corresponding to the + // (internal) symbol number NUM (which must be that of a token). */ + static + const ]b4_int_type_for([b4_toknum])[ + yytoken_number_[] = + { + ]b4_toknum[ + }; + return static_cast (yytoken_number_[type]); + } +]])[ + +]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) +# --------------------------- +# A comment describing this symbol. +m4_define([b4_char_sizeof_], +[ // b4_symbol([$1], [tag]) +]) + +# b4_char_sizeof(SYMBOL-NUMS) +# -------------------------- +# 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. +m4_define([b4_char_sizeof], +[b4_symbol_if([$1], [has_type], +[ +m4_map([b4_char_sizeof_], [$@])dnl + char _b4_char_sizeof_dummy@{sizeof([b4_symbol([$1], [type])])@}; +])]) + + +# b4_yytranslate_definition +# ------------------------- +# Define yytranslate_. Sometimes we want it in the header file, +# sometimes the cc file suffices. +m4_define([b4_yytranslate_definition], +[[ // Symbol number corresponding to token number t. + ]b4_parser_class_name[::token_number_type + ]b4_parser_class_name[::yytranslate_ (]b4_lex_symbol_if([token_type], + [int])[ t) + { + 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) <= yyeof_) + return yyeof_; + else if (static_cast (t) <= user_token_number_max_) + return translate_table[t]; + else + return undef_token_; + } +]]) + + +m4_pushdef([b4_copyright_years], + [2002, 2003, 2004, 2005, 2006, 2007, 2008]) + m4_define([b4_parser_class_name], - [b4_get_percent_define([[parser_class_name]])]) -m4_define([b4_namespace], - [b4_get_percent_define([[namespace]])]) + [b4_percent_define_get([[parser_class_name]])]) # The header is mandatory. b4_defines_if([], [b4_fatal([b4_skeleton[: using %%defines is mandatory]])]) -# Backward compatibility. +b4_locations_if( +[# Backward compatibility. m4_define([b4_location_constructors]) -m4_include(b4_pkgdatadir/[location.cc]) +m4_include(b4_pkgdatadir/[location.cc])]) # We do want M4 expansion after # for CPP macros. m4_changecom() m4_divert_push(0)dnl -b4_defines_if( -[@output(b4_spec_defines_file@) -b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++], - [2002, 2003, 2004, 2005, 2006]) +@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. */ @@ -46,19 +449,117 @@ dnl FIXME: This is wrong, we want computed header guards. #ifndef PARSER_HEADER_H # define PARSER_HEADER_H -]b4_get_percent_code([[requires]])[ +]b4_percent_code_get([[requires]])[ +]b4_assert_if([#include ])[ #include #include #include "stack.hh" -namespace ]b4_namespace[ -{ - class position; - class location; -} +]b4_namespace_open[ +]b4_locations_if([ 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); + } + + /// Construct and fill. + template + inline + variant (const T& t)]b4_assert_if([ + : built(true)])[ + { + new (buffer) T(t); + } + + /// Accessor to a built \a T. + template + inline T& + as() + {]b4_assert_if([ + assert(built);])[ + return reinterpret_cast(buffer); + } + + /// 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()); + } -#include "location.hh" + /// 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[ + +]b4_locations_if([#include "location.hh"])[ /* Enabling traces. */ #ifndef YYDEBUG @@ -78,46 +579,53 @@ namespace ]b4_namespace[ # define YYTOKEN_TABLE ]b4_token_table[ #endif -/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. +]b4_locations_if([dnl +[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. If N is 0, then set CURRENT to the empty location which ends the previous symbol: RHS[0] (always defined). */ #ifndef YYLLOC_DEFAULT -# define YYLLOC_DEFAULT(Current, Rhs, N) \ -do { \ - if (N) \ - { \ - (Current).begin = (Rhs)[1].begin; \ - (Current).end = (Rhs)[N].end; \ - } \ - else \ - { \ - (Current).begin = (Current).end = (Rhs)[0].end; \ - } \ +# 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 +#endif]])[ -namespace ]b4_namespace[ -{ +]b4_namespace_open[ /// A Bison parser. class ]b4_parser_class_name[ { public: - /// Symbol semantic values. #ifndef YYSTYPE -]m4_ifdef([b4_stype], +]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 - ;], + {b4_user_stype + };], [m4_if(b4_tag_seen_flag, 0, [[ typedef int semantic_type;]], -[[ typedef YYSTYPE semantic_type;]])])[ +[[ typedef YYSTYPE semantic_type;]])])])[ #else typedef YYSTYPE semantic_type; -#endif +#endif]b4_locations_if([ /// Symbol locations. - typedef ]b4_get_percent_define([[location_type]])[ location_type; + typedef b4_percent_define_get([[location_type]]) location_type;])[ /// Tokens. struct token { @@ -134,6 +642,7 @@ b4_user_stype /// \returns 0 iff parsing succeeded. virtual int parse (); +#if YYDEBUG /// The current debugging stream. std::ostream& debug_stream () const; /// Set the current debugging stream. @@ -145,107 +654,41 @@ b4_user_stype debug_level_type debug_level () const; /// Set the current debugging level. void set_debug_level (debug_level_type l); +#endif private: - /// Report a syntax error. - /// \param loc where the syntax error is found. + /// Report a syntax error.]b4_locations_if([ + /// \param loc where the syntax error is found.])[ /// \param msg a description of the syntax error. - virtual void error (const location_type& loc, const std::string& msg); + virtual void error (]b4_locations_if([const location_type& loc, ])[const std::string& msg); /// Generate an error message. /// \param state the state where the error occurred. /// \param tok the lookahead token. - virtual std::string yysyntax_error_ (int yystate]dnl -b4_error_verbose_if([, int tok])[); - -#if YYDEBUG - /// \brief Report a symbol value on the debug stream. - /// \param yytype The token type. - /// \param yyvaluep Its semantic value. - /// \param yylocationp Its location. - virtual void yy_symbol_value_print_ (int yytype, - const semantic_type* yyvaluep, - const location_type* yylocationp); - /// \brief Report a symbol on the debug stream. - /// \param yytype The token type. - /// \param yyvaluep Its semantic value. - /// \param yylocationp Its location. - virtual void yy_symbol_print_ (int yytype, - const semantic_type* yyvaluep, - const location_type* yylocationp); -#endif - + virtual std::string yysyntax_error_ (int yystate, int tok); /// State numbers. typedef int state_type; - /// State stack type. - typedef stack state_stack_type; - /// Semantic value stack type. - typedef stack semantic_stack_type; - /// location stack type. - typedef stack location_stack_type; - - /// The state stack. - state_stack_type yystate_stack_; - /// The semantic value stack. - semantic_stack_type yysemantic_stack_; - /// The location stack. - location_stack_type yylocation_stack_; /// Internal symbol numbers. typedef ]b4_int_type_for([b4_translate])[ token_number_type; - /* Tables. */ - /// 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_[]; + /* Tables. */ +]b4_parser_tables_declare[ #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE /// For a symbol, its name in clear. static const char* const yytname_[]; -#endif +#endif]b4_error_verbose_if([ -#if YYERROR_VERBOSE /// Convert the symbol name \a n to a form suitable for a diagnostic. - virtual std::string yytnamerr_ (const char *n); -#endif + static std::string yytnamerr_ (const char *n);])[ #if YYDEBUG - /// A type to store symbol numbers and -1. - typedef ]b4_int_type_for([b4_rhs])[ rhs_number_type; - /// A `-1'-separated list of the rules' RHS. - static const rhs_number_type yyrhs_[]; - /// For each rule, the index of the first RHS symbol in \a yyrhs_. - static const ]b4_int_type_for([b4_prhs])[ yyprhs_[]; - /// For each rule, its source line number. - static const ]b4_int_type_for([b4_rline])[ yyrline_[]; - /// For each scanner token number, its symbol number. - static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[]; +]b4_integral_parser_table_declare([rline], [b4_rline], + [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[ /// Report on the debug stream that the rule \a r is going to be reduced. virtual void yy_reduce_print_ (int r); /// Print the state stack on the debug stream. @@ -257,67 +700,175 @@ b4_error_verbose_if([, int tok])[); #endif /// Convert a scanner token number \a t to a symbol number. - token_number_type yytranslate_ (int t); + static inline token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t); + + /// A complete symbol, with its type. + template + struct symbol_base_type + { + /// Default constructor. + inline symbol_base_type (); + + /// Constructor.]b4_locations_if([ + inline symbol_base_type (const location_type& l)])[; + inline symbol_base_type (]b4_args( + [const semantic_type& v], + b4_locations_if([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;]b4_locations_if([ + + /// 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; + + 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; + + /// Default constructor. + inline symbol_type (); + + /// Constructor. + inline symbol_type (]b4_args([int t], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[); + + inline symbol_type (]b4_args([int t], + b4_locations_if([const location_type& l]))[); + + /// The symbol type. + int type; + + /// Return the type corresponding to this state. + inline int type_get_ () const; + + /// Its token. + inline token_type token () 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 (]b4_args([state_type s], + [const semantic_type& v], + b4_locations_if([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. */ - 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_; + 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[ }; -} -]m4_ifval(b4_get_percent_define([[global_tokens_and_yystype]]), +]b4_lex_symbol_if([b4_yytranslate_definition])[ +]b4_lex_symbol_if([b4_symbol_constructor_definitions])[ +]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::b4_parser_class_name::semantic_type +# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type #endif ]) -b4_get_percent_code([[provides]])[]dnl +b4_percent_code_get([[provides]])[]dnl [#endif /* ! defined PARSER_HEADER_H */] -])dnl -@output(b4_parser_file_name@) -b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++], - [2002, 2003, 2004, 2005, 2006]) -b4_get_percent_code([[top]])[]dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++]) +b4_percent_code_get([[top]])[]dnl m4_if(b4_prefix, [yy], [], [ // Take the name prefix into account. #define yylex b4_prefix[]lex])[ /* First part of user declarations. */ -]b4_user_pre_prologue +]b4_user_pre_prologue[ -b4_defines_if([[ -#include "@basename(]b4_spec_defines_file[@)"]])[ +#include "@basename(]b4_spec_defines_file[@)" /* User implementation prologue. */ ]b4_user_post_prologue -b4_get_percent_code[]dnl +b4_percent_code_get[]dnl [#ifndef YY_ # if YYENABLE_NLS @@ -340,44 +891,46 @@ b4_get_percent_code[]dnl /* A pseudo ostream that takes yydebug_ into account. */ # define YYCDEBUG if (yydebug_) (*yycdebug_) -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ -do { \ - if (yydebug_) \ - { \ - *yycdebug_ << Title << ' '; \ - yy_symbol_print_ ((Type), (Value), (Location)); \ - *yycdebug_ << std::endl; \ - } \ -} while (false) +# define YY_SYMBOL_PRINT(Title, Symbol) \ + do { \ + if (yydebug_) \ + { \ + *yycdebug_ << Title << ' '; \ + yy_print_ (*yycdebug_, Symbol); \ + *yycdebug_ << std::endl; \ + } \ + } while (false) # define YY_REDUCE_PRINT(Rule) \ -do { \ - if (yydebug_) \ - yy_reduce_print_ (Rule); \ -} while (false) + do { \ + if (yydebug_) \ + yy_reduce_print_ (Rule); \ + } while (false) # define YY_STACK_PRINT() \ -do { \ - if (yydebug_) \ - yystack_print_ (); \ -} while (false) + do { \ + if (yydebug_) \ + yystack_print_ (); \ + } while (false) #else /* !YYDEBUG */ # define YYCDEBUG if (false) std::cerr -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) -# define YY_REDUCE_PRINT(Rule) -# define YY_STACK_PRINT() +# 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 YYACCEPT goto yyacceptlab -#define YYABORT goto yyabortlab -#define YYERROR goto yyerrorlab +#define yyerrok (yyerrstatus_ = 0) +#define yyclearin (yyempty = true) -namespace ]b4_namespace[ -{ -#if YYERROR_VERBOSE +#define YYACCEPT goto yyacceptlab +#define YYABORT goto yyabortlab +#define YYERROR goto yyerrorlab +#define YYRECOVERING() (!!yyerrstatus_) + +]b4_namespace_open[]b4_error_verbose_if([[ /* Return YYSTR after stripping away unnecessary quotes and backslashes, so that it's suitable for yyerror. The heuristic is @@ -415,8 +968,7 @@ namespace ]b4_namespace[ return yystr; } - -#endif +]])[ /// Build a parser object. ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [ @@ -432,62 +984,116 @@ namespace ]b4_namespace[ { } -#if YYDEBUG - /*--------------------------------. - | Print this symbol on YYOUTPUT. | - `--------------------------------*/ - inline void - ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype, - const semantic_type* yyvaluep, const location_type* yylocationp) + /*---------------. + | Symbol types. | + `---------------*/ + +]b4_lex_symbol_if([], [b4_symbol_constructor_definitions])[ + + // stack_symbol_type. + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type () + : super_type () + , state () { - YYUSE (yylocationp); - YYUSE (yyvaluep); - switch (yytype) - { - ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl -[ default: - break; - } } + ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]b4_args( + [state_type s], + [const semantic_type& v], + b4_locations_if([const location_type& l]))[) + : super_type (v]b4_locations_if([, l])[) + , state (s) + { + } - void - ]b4_parser_class_name[::yy_symbol_print_ (int yytype, - const semantic_type* yyvaluep, const location_type* yylocationp) + int + ]b4_parser_class_name[::stack_symbol_type::type_get_ () const { - *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm") - << ' ' << yytname_[yytype] << " (" - << *yylocationp << ": "; - yy_symbol_value_print_ (yytype, yyvaluep, yylocationp); - *yycdebug_ << ')'; + return yystos_[state]; } -#endif + + template void - ]b4_parser_class_name[::yydestruct_ (const char* yymsg, - int yytype, semantic_type* yyvaluep, location_type* yylocationp) + ]b4_parser_class_name[::yy_destroy_ (const char* yymsg, + symbol_base_type& yysym) const { - YYUSE (yylocationp); + int yytype = yysym.type_get (); YYUSE (yymsg); - YYUSE (yyvaluep); - - YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp); + if (yymsg) + YY_SYMBOL_PRINT (yymsg, yysym); + // User destructor. switch (yytype) { - ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ +]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[ default: break; + }]b4_variant_if([ + + // Type destructor. + b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[ + } + +#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] << " ("]b4_locations_if([ + << 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 (]b4_args( + [s], + [semantic_type()], + b4_locations_if([sym.location]))[)); + ]b4_symbol_variant([[yystos_[s]]], [[yystack_[0].value]], + [build], [sym.value])], +[[ yystack_.push (stack_symbol_type (]b4_args( + [s], + [sym.value], + b4_locations_if([sym.location]))[));]])[ + } + + void + ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s) + { + if (m) + YY_SYMBOL_PRINT (m, s); +]b4_variant_if( +[[ yystack_.push (stack_symbol_type (]b4_args( + [s.state], + [semantic_type()], + b4_locations_if([s.location]))[)); + ]b4_symbol_variant([[yystos_[s.state]]], [[yystack_[0].value]], + [build], [s.value])], +[ yystack_.push (s);])[ } void ]b4_parser_class_name[::yypop_ (unsigned int n) { - yystate_stack_.pop (n); - yysemantic_stack_.pop (n); - yylocation_stack_.pop (n); + yystack_.pop (n); } #if YYDEBUG @@ -520,9 +1126,8 @@ namespace ]b4_namespace[ int ]b4_parser_class_name[::parse () { - /// Lookahead and lookahead in internal form. - int yychar = yyempty_; - int yytoken = 0; + /// Whether yyla contains a lookahead. + bool yyempty = true; /* State. */ int yyn; @@ -533,43 +1138,39 @@ namespace ]b4_namespace[ int yynerrs_ = 0; int yyerrstatus_ = 0; - /// Semantic value of the lookahead. - semantic_type yylval; - /// Location of the lookahead. - location_type yylloc; + /// The lookahead symbol. + symbol_type yyla;]b4_locations_if([[ + /// The locations where the error started and ended. - location yyerror_range[2]; + stack_symbol_type yyerror_range[2];]])[ - /// $$. - semantic_type yyval; - /// @@$. - location_type yyloc; + /// $$ and @@$. + stack_symbol_type yylhs; + /// The return value of parse(). int yyresult; YYCDEBUG << "Starting parse" << std::endl; ]m4_ifdef([b4_initial_action], [ -m4_pushdef([b4_at_dollar], [yylloc])dnl -m4_pushdef([b4_dollar_dollar], [yylval])dnl +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 stacks. The initial state will be pushed in + [ /* 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. */ - 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); + yystack_ = stack_type (0); + yypush_ (0, 0, yyla); - /* New state. */ + // A new state was pushed on the stack. + // Invariant: yystate == yystack_[0].state, i.e., + // yystate was just pushed onto the state stack. yynewstate: - yystate_stack_.push (yystate); YYCDEBUG << "Entering state " << yystate << std::endl; /* Accept? */ @@ -587,32 +1188,24 @@ m4_popdef([b4_at_dollar])])dnl 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 + if (yyempty) { - yytoken = yytranslate_ (yychar); - YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); + YYCDEBUG << "Reading a token: "; +]b4_lex_symbol_if( +[ yyla = b4_c_function_call([yylex], [symbol_type], + m4_ifdef([b4_lex_param], b4_lex_param));], +[ yyla.type = yytranslate_ (b4_c_function_call([yylex], [int], + [[YYSTYPE*], [&yyla.value]][]dnl +b4_locations_if([, [[location*], [&yyla.location]]])dnl +m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[ + yyempty = false; } + YY_SYMBOL_PRINT ("Next token is", yyla); - /* If the proper action on seeing token YYTOKEN is to reduce or to - detect an error, take that action. */ - yyn += yytoken; - if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken) + /* 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. */ @@ -620,26 +1213,22 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; if (yyn <= 0) { if (yyn == 0 || yyn == yytable_ninf_) - goto yyerrlab; + goto yyerrlab; yyn = -yyn; goto yyreduce; } - /* Shift the lookahead token. */ - YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); - /* Discard the token being shifted. */ - yychar = yyempty_; - - yysemantic_stack_.push (yylval); - yylocation_stack_.push (yylloc); + yyempty = true; /* 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; /*-----------------------------------------------------------. @@ -655,45 +1244,66 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; | yyreduce -- Do a reduction. | `-----------------------------*/ yyreduce: - yylen = yyr2_[yyn]; + 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: `$$ = $1'. Otherwise, use the top of the stack. - Otherwise, the following line sets YYVAL to garbage. + Otherwise, the following line sets YYLHS.VALUE to garbage. This behavior is undocumented and Bison users should not rely upon it. */ if (yylen) - yyval = yysemantic_stack_[yylen - 1]; + yylhs.value = yystack_@{yylen - 1@}.value; else - yyval = yysemantic_stack_[0]; - + yylhs.value = yystack_@{0@}.value;])[ +]b4_locations_if([dnl +[ + // Compute the default @@$. { - slice slice (yylocation_stack_, yylen); - YYLLOC_DEFAULT (yyloc, slice, yylen); - } + slice slice (yystack_, yylen); + YYLLOC_DEFAULT (yylhs.location, slice, yylen); + }]])[ + + // Perform the reduction. YY_REDUCE_PRINT (yyn); switch (yyn) { - ]b4_user_actions[ - default: break; +]b4_user_actions[ + default: + break; } - YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], &yyval, &yyloc); + // 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 (); - yysemantic_stack_.push (yyval); - yylocation_stack_.push (yyloc); - /* Shift the result of the reduction. */ - yyn = yyr1_[yyn]; - yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0]; - if (0 <= yystate && yystate <= yylast_ - && yycheck_[yystate] == yystate_stack_[0]) - yystate = yytable_[yystate]; - else - yystate = yydefgoto_[yyn - yyntokens_]; + yypush_ (0, yylhs); goto yynewstate; /*------------------------------------. @@ -704,26 +1314,24 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[; if (!yyerrstatus_) { ++yynerrs_; - error (yylloc, yysyntax_error_ (yystate]dnl -b4_error_verbose_if([, yytoken])[)); + error (]b4_args(b4_locations_if([yyla.location]), + [yysyntax_error_ (yystate, yyla.type)])[); } - yyerror_range[0] = yylloc; +]b4_locations_if([[ + yyerror_range[0].location = yyla.location;]])[ if (yyerrstatus_ == 3) { /* If just tried and failed to reuse lookahead token after an - error, discard it. */ - - if (yychar <= yyeof_) - { - /* Return failure if at end of input. */ - if (yychar == yyeof_) - YYABORT; - } - else - { - yydestruct_ ("Error: discarding", yytoken, &yylval, &yylloc); - yychar = yyempty_; + error, discard it. */ + + /* Return failure if at end of input. */ + if (yyla.type == yyeof_) + YYABORT; + else + { + yy_destroy_ ("Error: discarding", yyla); + yyempty = true; } } @@ -743,12 +1351,13 @@ b4_error_verbose_if([, yytoken])[)); if (false) goto yyerrorlab; - yyerror_range[0] = yylocation_stack_[yylen - 1]; +]b4_locations_if([[ + 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 = yystate_stack_[0]; + yystate = yystack_[0].state; goto yyerrlab1; /*-------------------------------------------------------------. @@ -756,46 +1365,40 @@ b4_error_verbose_if([, yytoken])[)); `-------------------------------------------------------------*/ yyerrlab1: yyerrstatus_ = 3; /* Each real token shifted decrements this. */ + { + stack_symbol_type error_token; + 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; + } + } - 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 (); - } - - yyerror_range[1] = yylloc; - // Using YYLLOC is tempting, but would change the location of - // the lookahead. YYLOC is available though. - YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2); - yysemantic_stack_.push (yylval); - yylocation_stack_.push (yyloc); - - /* Shift the error token. */ - YY_SYMBOL_PRINT ("Shifting", yystos_[yyn], - &yysemantic_stack_[0], &yylocation_stack_[0]); - - yystate = yyn; + // Pop the current state because it cannot handle the error token. + if (yystack_.size () == 1) + YYABORT; +]b4_locations_if([[ + yyerror_range[0].location = yystack_[0].location;]])[ + yy_destroy_ ("Error: popping", yystack_[0]); + yypop_ (); + yystate = yystack_[0].state; + YY_STACK_PRINT (); + } +]b4_locations_if([[ + 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); + } goto yynewstate; /* Accept. */ @@ -809,18 +1412,15 @@ b4_error_verbose_if([, yytoken])[)); goto yyreturn; yyreturn: - if (yychar != yyempty_) - yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc); + if (!yyempty) + yy_destroy_ ("Cleanup: discarding lookahead", yyla); /* Do not reclaim the symbols of the rule which action triggered this YYABORT or YYACCEPT. */ yypop_ (yylen); - while (yystate_stack_.height () != 1) + while (yystack_.size () != 1) { - yydestruct_ ("Cleanup: popping", - yystos_[yystate_stack_[0]], - &yysemantic_stack_[0], - &yylocation_stack_[0]); + yy_destroy_ ("Cleanup: popping", yystack_[0]); yypop_ (); } @@ -829,12 +1429,11 @@ b4_error_verbose_if([, yytoken])[)); // Generate an error message. std::string - ]b4_parser_class_name[::yysyntax_error_ (int yystate]dnl -b4_error_verbose_if([, int tok])[) + ]b4_parser_class_name[::yysyntax_error_ (]dnl +b4_error_verbose_if([int yystate, int yytoken], + [int, int])[) { - std::string res; - YYUSE (yystate); -#if YYERROR_VERBOSE + std::string yyres;]b4_error_verbose_if([[ int yyn = yypact_[yystate]; if (yypact_ninf_ < yyn && yyn <= yylast_) { @@ -845,119 +1444,63 @@ b4_error_verbose_if([, int tok])[) /* 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]); - } - } + + // Number of "expected" tokens. + size_t yycount = 0; + // Its maximum. + enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + // Arguments of yyformat. + char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; + yyarg[yycount++] = yytname_[yytoken]; + for (int yyx = yyxbegin; yyx < yyxend; ++yyx) + if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_) + { + if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) + { + yycount = 1; + break; + } + else + yyarg[yycount++] = yytname_[yyx]; + } + + char const* yyformat = 0; + switch (yycount) + { +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +#undef YYCASE_ + } + // Argument number. + size_t yyi = 0; + for (char const* yyp = yyformat; *yyp; ++yyp) + if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount) + { + yyres += yytnamerr_ (yyarg[yyi++]); + ++yyp; + } + else + yyres += *yyp; } else -#endif - res = YY_("syntax error"); - return res; + ]])dnl +[ yyres = YY_("syntax error"); + return yyres; } - /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing - STATE-NUM. */ const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[; - const ]b4_int_type_for([b4_pact])[ - ]b4_parser_class_name[::yypact_[] = - { - ]b4_pact[ - }; - /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE - doesn't specify something else to do. Zero means the default is an - error. */ - const ]b4_int_type_for([b4_defact])[ - ]b4_parser_class_name[::yydefact_[] = - { - ]b4_defact[ - }; - - /* YYPGOTO[NTERM-NUM]. */ - const ]b4_int_type_for([b4_pgoto])[ - ]b4_parser_class_name[::yypgoto_[] = - { - ]b4_pgoto[ - }; - - /* YYDEFGOTO[NTERM-NUM]. */ - const ]b4_int_type_for([b4_defgoto])[ - ]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) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[; - const ]b4_int_type_for([b4_table])[ - ]b4_parser_class_name[::yytable_[] = - { - ]b4_table[ - }; - /* YYCHECK. */ - const ]b4_int_type_for([b4_check])[ - ]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])[ - ]b4_parser_class_name[::yystos_[] = - { - ]b4_stos[ - }; - -#if YYDEBUG - /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding - to YYLEX-NUM. */ - const ]b4_int_type_for([b4_toknum])[ - ]b4_parser_class_name[::yytoken_number_[] = - { - ]b4_toknum[ - }; -#endif - - /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ - const ]b4_int_type_for([b4_r1])[ - ]b4_parser_class_name[::yyr1_[] = - { - ]b4_r1[ - }; - - /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ - const ]b4_int_type_for([b4_r2])[ - ]b4_parser_class_name[::yyr2_[] = - { - ]b4_r2[ - }; +]b4_parser_tables_define[ #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. @@ -965,41 +1508,23 @@ b4_error_verbose_if([, int tok])[) const char* const ]b4_parser_class_name[::yytname_[] = { - ]b4_tname[ + ]b4_tname[ }; #endif #if YYDEBUG - /* YYRHS -- A `-1'-separated list of the rules' RHS. */ - const ]b4_parser_class_name[::rhs_number_type - ]b4_parser_class_name[::yyrhs_[] = - { - ]b4_rhs[ - }; - - /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in - YYRHS. */ - const ]b4_int_type_for([b4_prhs])[ - ]b4_parser_class_name[::yyprhs_[] = - { - ]b4_prhs[ - }; - - /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */ - const ]b4_int_type_for([b4_rline])[ - ]b4_parser_class_name[::yyrline_[] = - { - ]b4_rline[ - }; +]b4_integral_parser_table_define([rline], [b4_rline])[ // Print the state stack on the debug stream. void ]b4_parser_class_name[::yystack_print_ () { *yycdebug_ << "Stack now"; - for (state_stack_type::const_iterator i = yystate_stack_.begin (); - i != yystate_stack_.end (); ++i) - *yycdebug_ << ' ' << *i; + for (stack_type::const_iterator + i = yystack_.begin (), + i_end = yystack_.end (); + i != i_end; ++i) + *yycdebug_ << ' ' << i->state; *yycdebug_ << std::endl; } @@ -1011,59 +1536,27 @@ b4_error_verbose_if([, int tok])[) int yynrhs = yyr2_[yyrule]; /* Print the symbols being reduced, and their result. */ *yycdebug_ << "Reducing stack by rule " << yyrule - 1 - << " (line " << yylno << "), "; + << " (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)[); + ]b4_rhs_data(yynrhs, yyi + 1)[); } #endif // YYDEBUG - /* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ - ]b4_parser_class_name[::token_number_type - ]b4_parser_class_name[::yytranslate_ (int t) - { - 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_; - } +]b4_lex_symbol_if([], [b4_yytranslate_definition])[ +]b4_namespace_close[ - const int ]b4_parser_class_name[::yyeof_ = 0; - const int ]b4_parser_class_name[::yylast_ = ]b4_last[; - const int ]b4_parser_class_name[::yynnts_ = ]b4_nterms_number[; - const int ]b4_parser_class_name[::yyempty_ = -2; - const int ]b4_parser_class_name[::yyfinal_ = ]b4_final_state_number[; - const int ]b4_parser_class_name[::yyterror_ = 1; - const int ]b4_parser_class_name[::yyerrcode_ = 256; - const int ]b4_parser_class_name[::yyntokens_ = ]b4_tokens_number[; - - const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[; - const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[; - -} // namespace ]b4_namespace[ - -]b4_epilogue -dnl -@output(b4_dir_prefix[]stack.hh@) -b4_copyright([Stack handling for Bison parsers in C++], - [2002, 2003, 2004, 2005, 2006])[ +]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 ]b4_namespace[ -{ +]b4_namespace_open[ template > class stack { @@ -1111,17 +1604,17 @@ namespace ]b4_namespace[ } 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_; }; @@ -1149,7 +1642,9 @@ namespace ]b4_namespace[ const S& stack_; unsigned int range_; }; -} +]b4_namespace_close[ -#endif // not BISON_STACK_HH] +#endif // not BISON_STACK_HH[]dnl +] m4_divert_pop(0) +m4_popdef([b4_copyright_years])dnl