-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) 2002-2011 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
-
+#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
-
+#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
-## ---------------- ##
-## Default values. ##
-## ---------------- ##
+m4_include(b4_pkgdatadir/[c++.m4])
-# Default Parser class name.
-m4_define_default([b4_parser_class_name], [Parser])
+# b4_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT)
+# --------------------------------------------------------------
+# Declare "parser::yy<TABLE-NAME>_" 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<TABLE-NAME>_" which contents is CONTENT.
+m4_define([b4_integral_parser_table_define],
+[ const b4_int_type_for([$2])
+ b4_parser_class_name::yy$1_[[]] =
+ {
+ $2
+ };dnl
+])
-## ----------------- ##
-## Semantic Values. ##
-## ----------------- ##
+
+# b4_symbol_value_template(VAL, [TYPE])
+# -------------------------------------
+# Same as b4_symbol_value, but used in a template method. It makes
+# a difference when using variants.
+m4_copy([b4_symbol_value], [b4_symbol_value_template])
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
m4_define([b4_lhs_value],
-[yyval[]m4_ifval([$1], [.$1])])
+ [b4_symbol_value([yylhs.value], [$1])])
+
+
+# b4_lhs_location()
+# -----------------
+# Expansion of @$.
+m4_define([b4_lhs_location],
+ [yylhs.location])
+
+
+# b4_rhs_data(RULE-LENGTH, NUM)
+# -----------------------------
+# Return the data corresponding to the symbol #NUM, where the current
+# rule has RULE-LENGTH symbols on RHS.
+m4_define([b4_rhs_data],
+ [yystack_@{b4_subtract($@)@}])
+
+
+# b4_rhs_state(RULE-LENGTH, NUM)
+# ------------------------------
+# The state corresponding to the symbol #NUM, where the current
+# rule has RULE-LENGTH symbols on RHS.
+m4_define([b4_rhs_state],
+ [b4_rhs_data([$1], [$2]).state])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
-[semantic_stack_@{m4_eval([$1 - $2])@}m4_ifval([$3], [.$3])])
-
-m4_define_default([b4_location_type], [Location])
-
-# b4_lhs_location()
-# -----------------
-# Expansion of @$.
-m4_define([b4_lhs_location],
-[yyloc])
+ [b4_symbol_value([b4_rhs_data([$1], [$2]).value], [$3])])
# b4_rhs_location(RULE-LENGTH, NUM)
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
-[location_stack_@{m4_eval([$1 - $2])@}])
-
-
-m4_define([b4_inherit],
- [m4_ifdef([b4_root],
- [: public b4_root
-],
- [])])
-
-m4_define([b4_param],
- [m4_ifdef([b4_root],
- [,
- const Param& param],
- [])])
-
-m4_define([b4_constructor],
- [m4_ifdef([b4_root],
- [b4_root (param),
- ],
- [])])
-
-
-# b4_parse_param_decl
-# -------------------
-# Constructor's extra arguments.
-m4_define([b4_parse_param_decl],
- [m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])])
-
-# b4_parse_param_cons
-# -------------------
-# constructor's extra initialisations.
-m4_define([b4_parse_param_cons],
- [m4_ifset([b4_parse_param],
- [,
- b4_cc_constructor_calls(b4_parse_param)])])
-m4_define([b4_cc_constructor_calls],
- [m4_map_sep([b4_cc_constructor_call], [,
- ], [$@])])
-m4_define([b4_cc_constructor_call],
- [$2($2)])
-
-# b4_parse_param_vars
-# -------------------
-# Extra instance variables.
-m4_define([b4_parse_param_vars],
- [m4_ifset([b4_parse_param],
- [
- /* User arguments. */
-b4_cc_var_decls(b4_parse_param)])])
-m4_define([b4_cc_var_decls],
- [m4_map_sep([b4_cc_var_decl], [
-], [$@])])
-m4_define([b4_cc_var_decl],
- [ $1;])
-
-
-# b4_yysymprint_generate(FUNCTION-DECLARATOR)
-# -------------------------------------------
-# Generate the "symprint_" member function.
-m4_define([b4_yysymprint_generate],
-[[/*--------------------------------.
-| 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] << " (";
- switch (yytype)
- {
-]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
-[ default:
+ [b4_rhs_data([$1], [$2]).location])
+
+
+# b4_symbol_action(SYMBOL-NUM, KIND)
+# ----------------------------------
+# Run the action KIND (destructor or printer) for SYMBOL-NUM.
+# Same as in C, but using references instead of pointers.
+m4_define([b4_symbol_action],
+[b4_symbol_if([$1], [has_$2],
+[m4_pushdef([b4_dollar_dollar],
+ [b4_symbol_value_template([yysym.value],
+ b4_symbol_if([$1], [has_type],
+ [b4_symbol([$1], [type])]))])dnl
+m4_pushdef([b4_at_dollar], [yysym.location])dnl
+ b4_symbol_case_([$1])
+b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
+ b4_symbol([$1], [$2])
+b4_syncline([@oline@], [@ofile@])
break;
- }
- cdebug_ << ')';
-}
-]])
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])])
-# b4_cxx_destruct_def(IGNORED-ARGUMENTS)
-# --------------------------------------
-# Declare the destruct_ method.
-m4_define([b4_cxx_destruct_def],
-[void
-yy::b4_parser_class_name::destruct_ (int yytype, SemanticType *yyvaluep, LocationType *yylocationp)[]dnl
-])
+m4_pushdef([b4_copyright_years],
+ [2002-2011])
+
+m4_define([b4_parser_class_name],
+ [b4_percent_define_get([[parser_class_name]])])
+
+# The header is mandatory.
+b4_defines_if([],
+ [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
+
+b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
+ [# Backward compatibility.
+ m4_define([b4_location_constructors])
+ m4_include(b4_pkgdatadir/[location.cc])])])
+m4_include(b4_pkgdatadir/[stack.hh])
+b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
-m4_if(b4_defines_flag, 0, [],
-[@output @output_header_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002, 2003, 2004])[
-/* FIXME: This is wrong, we want computed header guards.
- I don't know why the macros are missing now. :( */
+m4_divert_push(0)dnl
+@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++])
+dnl FIXME: This is wrong, we want computed header guards.
+[
+/* C++ LALR(1) parser skeleton written by Akim Demaille. */
+
#ifndef PARSER_HEADER_H
# define PARSER_HEADER_H
-#include "stack.hh"
-#include "location.hh"
+]b4_percent_code_get([[requires]])[
+]b4_parse_assert_if([#include <cassert>])[
+#include <stdexcept>
#include <string>
#include <iostream>
+#include "stack.hh"
+]b4_locations_if([b4_percent_define_ifdef([[location_type]], [],
+ [[#include "location.hh"]])])[
-/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
-
-]b4_token_defines(b4_tokens)[
-
-/* Copy the first part of user declarations. */
-]b4_pre_prologue[
-
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
+]b4_variant_if([b4_namespace_open
+b4_variant_define
+b4_namespace_close])[
/* Enabling traces. */
#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
+# define YYDEBUG ]b4_parse_trace_if([1], [0])[
#endif
-/* Enabling verbose error message. */
-#ifndef YYERROR_VERBOSE
-# define YYERROR_VERBOSE ]b4_error_verbose[
-#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_if([1], [0])[
#endif
-/* Copy the second part of user declarations. */
-]b4_post_prologue[
-
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N) \
- ((Current).end = Rhs[N].end)
+/* Enabling the token table. */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE ]b4_token_table[
#endif
-namespace yy
-{
- class ]b4_parser_class_name[;
+]b4_namespace_open[
- 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;
- };
-}
-
-namespace yy
-{
- class ]b4_parser_class_name b4_inherit[
+ /// A Bison parser.
+ class ]b4_parser_class_name[
{
public:
+]b4_public_types_declare[
+ /// Build a parser object.
+ ]b4_parser_class_name[ (]b4_parse_param_decl[);
+ virtual ~]b4_parser_class_name[ ();
- typedef Traits< ]b4_parser_class_name[ >::TokenNumberType TokenNumberType;
- typedef Traits< ]b4_parser_class_name[ >::RhsNumberType RhsNumberType;
- typedef Traits< ]b4_parser_class_name[ >::StateType StateType;
- typedef Traits< ]b4_parser_class_name[ >::SemanticType SemanticType;
- typedef Traits< ]b4_parser_class_name[ >::LocationType LocationType;
-
- typedef Stack< StateType > StateStack;
- typedef Stack< SemanticType > SemanticStack;
- typedef Stack< LocationType > LocationStack;
-
-#if YYLSP_NEEDED
- ]b4_parser_class_name[ (bool debug,
- LocationType initlocation][]b4_param[]b4_parse_param_decl[) :
- ]b4_constructor[][debug_ (debug),
- cdebug_ (std::cerr),
- initlocation_ (initlocation)]b4_parse_param_cons[
-#else
- ]b4_parser_class_name[ (bool debug][]b4_param[]b4_parse_param_decl[) :
- ]b4_constructor[][debug_ (debug),
- cdebug_ (std::cerr)]b4_parse_param_cons[
-#endif
- {
- }
-
- virtual ~]b4_parser_class_name[ ()
- {
- }
-
+ /// Parse.
+ /// \returns 0 iff parsing succeeded.
virtual int parse ();
- private:
-
- 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 */
-
-
- /* Stacks. */
- StateStack state_stack_;
- SemanticStack semantic_stack_;
- LocationStack location_stack_;
-
- /* 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_[];
+ /// 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
- /* More tables, for debugging. */
-#if YYDEBUG
- static const RhsNumberType rhs_[];
- static const ]b4_int_type_for([b4_prhs])[ prhs_[];
- static const ]b4_int_type_for([b4_rline])[ rline_[];
- static const ]b4_int_type_for([b4_toknum])[ token_number_[];
- virtual void reduce_print_ (int yyrule);
- virtual void stack_print_ ();
-#endif
-
- /* Even more tables. */
- static inline TokenNumberType translate_ (int token);
- static inline void destruct_ (int yytype, SemanticType *yyvaluep,
- LocationType *yylocationp);
-
- /* 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_;
-
- /* State. */
- int n_;
- int len_;
- int state_;
+ /// Report a syntax error.]b4_locations_if([
+ /// \param loc where the syntax error is found.])[
+ /// \param msg a description of the syntax error.
+ virtual void error (]b4_locations_if([const location_type& loc, ])[const std::string& msg);
- /* Error handling. */
- int nerrs_;
- int errstatus_;
+ private:
+ /// State numbers.
+ typedef int state_type;
- /* Debugging. */
- int debug_;
- std::ostream &cdebug_;
+ /// Generate an error message.
+ /// \param yystate the state where the error occurred.
+ /// \param yytoken the lookahead token.
+ virtual std::string yysyntax_error_ (state_type yystate, int yytoken);
- /* Look-ahead and look-ahead in internal form. */
- int looka_;
- int ilooka_;
+ /// Compute post-reduction state.
+ /// \param yystate the current state
+ /// \param yylhs the nonterminal to push on the stack
+ state_type yy_lr_goto_state_ (state_type yystate, int yylhs);
- /* Message. */
- std::string message;
+ /// Whether the given \c yypact_ value indicates a defaulted state.
+ /// \param yyvalue the value to check
+ static bool yy_pact_value_is_default_ (int yyvalue);
- /* Semantic value and location of look-ahead token. */
- SemanticType value;
- LocationType location;
- /* Beginning of the last erroneous token popped off. */
- Position error_start_;
+ /// Whether the given \c yytable_ value indicates a syntax error.
+ /// \param yyvalue the value to check
+ static bool yy_table_value_is_error_ (int yyvalue);
- /* @@$ and $$. */
- SemanticType yyval;
- LocationType yyloc;
+ /// Internal symbol numbers.
+ typedef ]b4_int_type_for([b4_translate])[ token_number_type;
+ static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
+ static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
- /* Initial location. */
- LocationType initlocation_;
-]b4_parse_param_vars[
- };
-}
+ /* Tables. */
+]b4_parser_tables_declare[
-#endif /* ! defined PARSER_HEADER_H */]
-])dnl
-@output @output_parser_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002, 2003, 2004])
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+ /// For a symbol, its name in clear.
+ static const char* const yytname_[];
+#endif]b4_error_verbose_if([
-m4_if(b4_defines_flag, 0, [], [#include @output_header_name@])[
+ /// Convert the symbol name \a n to a form suitable for a diagnostic.
+ static std::string yytnamerr_ (const char *n);])[
-/* Enable debugging if requested. */
#if YYDEBUG
-# define YYCDEBUG if (debug_) cdebug_
-# define YY_REDUCE_PRINT(Rule) \
-do { \
- if (debug_) \
- reduce_print_ (Rule); \
-} while (0)
-# define YY_STACK_PRINT() \
-do { \
- if (debug_) \
- stack_print_ (); \
-} while (0)
-#else /* !YYDEBUG */
-# define YYCDEBUG if (0) cdebug_
-# define YY_REDUCE_PRINT(Rule)
-# define YY_STACK_PRINT()
-#endif /* !YYDEBUG */
-
-#define YYACCEPT goto yyacceptlab
-#define YYABORT goto yyabortlab
-#define YYERROR goto yyerrorlab
+]b4_integral_parser_table_declare([rline], [b4_rline],
+ [YYRLINE[YYN] -- Source line where rule number YYN was defined.])[
+ /// Report on the debug stream that the rule \a r is going to be reduced.
+ virtual void yy_reduce_print_ (int r);
+ /// Print the state stack on the debug stream.
+ virtual void yystack_print_ ();
-#if YYDEBUG
-]b4_yysymprint_generate([b4_cxx_symprint_def])[
-#endif /* ! YYDEBUG */
-]b4_yydestruct_generate([b4_cxx_destruct_def])[
-
-int
-yy::]b4_parser_class_name[::parse ()
-{
- nerrs_ = 0;
- errstatus_ = 0;
-
- /* 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 (1);
- location_stack_ = LocationStack (1);
-
- /* Start. */
- state_ = 0;
- looka_ = empty_;
-#if YYLSP_NEEDED
- location = initlocation_;
+ /* Debugging. */
+ int yydebug_;
+ std::ostream* yycdebug_;
#endif
- YYCDEBUG << "Starting parse" << std::endl;
-
- /* 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;
+ /// Convert a scanner token number \a t to a symbol number.
+ static inline token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t);
- /* Read a look-ahead token. */
- if (looka_ == empty_)
- {
- YYCDEBUG << "Reading a token: ";
- lex_ ();
- }
-
- /* Convert token to internal form. */
- if (looka_ <= 0)
- {
- looka_ = eof_;
- ilooka_ = 0;
- YYCDEBUG << "Now at end of input." << std::endl;
- }
- else
- {
- ilooka_ = translate_ (looka_);
#if YYDEBUG
- if (debug_)
- {
- cdebug_ << "Next token is ";
- symprint_ (ilooka_, &value, &location);
- cdebug_ << std::endl;
- }
+ /// \brief Display a symbol type, value and location.
+ /// \param yyo The output stream.
+ /// \param yysym The symbol.
+ template <typename Exact>
+ void yy_print_ (std::ostream& yyo,
+ const symbol_base_type<Exact>& yysym) const;
#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;
- /* 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;
+ /// \brief Reclaim the memory associated to a symbol.
+ /// \param yymsg Why this token is reclaimed.
+ /// If null, print nothing.
+ /// \param s The symbol.
+ template <typename Exact>
+ inline void yy_destroy_ (const char* yymsg,
+ symbol_base_type<Exact>& yysym) const;
- /* Shift the look-ahead token. */
-#if YYDEBUG
- YYCDEBUG << "Shifting token " << looka_
- << " (" << name_[ilooka_] << "), ";
-#endif
-
- /* 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];
- }
-
- if (len_)
- {
- Slice< LocationType, LocationStack > slice (location_stack_, len_);
- YYLLOC_DEFAULT (yyloc, slice, len_);
- }
- YY_REDUCE_PRINT (n_);
- switch (n_)
+ private:
+ /// Element of the stack: a state and its attributes.
+ struct stack_symbol_type : symbol_base_type<stack_symbol_type>
{
- ]b4_actions[
- }
+ /// The parent class.
+ typedef symbol_base_type<stack_symbol_type> super_type;
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
+ /// Default constructor.
+ inline stack_symbol_type ();
- state_stack_.pop (len_);
- semantic_stack_.pop (len_);
- location_stack_.pop (len_);
+ /// Constructor.
+ inline stack_symbol_type (]b4_args([state_type s],
+ [const semantic_type& v],
+ b4_locations_if([const location_type& l]))[);
- YY_STACK_PRINT ();
-
- semantic_stack_.push (yyval);
- location_stack_.push (yyloc);
-
- /* 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_ ();
-
- error_start_ = location.begin;
- if (errstatus_ == 3)
- {
- /* If just tried and failed to reuse look-ahead token after an
- error, discard it. */
-
- /* Return failure if at end of input. */
- if (looka_ <= eof_)
- {
- /* If at end of input, pop the error token,
- then the rest of the stack, then return failure. */
- if (looka_ == eof_)
- for (;;)
- {
- error_start_ = location_stack_[0].begin;
- state_stack_.pop ();
- semantic_stack_.pop ();
- location_stack_.pop ();
- if (state_stack_.height () == 1)
- YYABORT;
-#if YYDEBUG
- if (debug_)
- {
- cdebug_ << "Error: popping ";
- symprint_ (stos_[state_stack_[0]],
- &semantic_stack_[0],
- &location_stack_[0]);
- cdebug_ << std::endl;
- }
-#endif // YYDEBUG
- destruct_ (stos_[state_stack_[0]],
- &semantic_stack_[0],
- &location_stack_[0]);
- }
- }
- else
- {
-#if YYDEBUG
- if (debug_)
- {
- cdebug_ << "Error: discarding ";
- symprint_ (ilooka_, &value, &location);
- cdebug_ << std::endl;
- }
-#endif
- destruct_ (ilooka_, &value, &location);
- looka_ = empty_;
- }
- }
+ /// The state.
+ state_type state;
- /* Else will try to reuse look-ahead token after shifting the error
- token. */
- goto yyerrlab1;
+ /// The type (corresponding to \a state).
+ inline int type_get_ () const;
+ };
+ /// Stack type.
+ typedef stack<stack_symbol_type> stack_type;
-/*---------------------------------------------------.
-| yyerrorlab -- error raised explicitly by YYERROR. |
-`---------------------------------------------------*/
-yyerrorlab:
+ /// The stack.
+ stack_type yystack_;
-#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
+ /// 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);
- state_stack_.pop (len_);
- semantic_stack_.pop (len_);
- error_start_ = location_stack_[len_ - 1].begin;
- location_stack_.pop (len_);
- state_ = state_stack_[0];
- goto yyerrlab1;
+ /// 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);
-/*-------------------------------------------------------------.
-| yyerrlab1 -- common code for both syntax error and YYERROR. |
-`-------------------------------------------------------------*/
-yyerrlab1:
- errstatus_ = 3; /* Each real token shifted decrements this. */
+ /// Pop \a n symbols the three stacks.
+ inline void yypop_ (unsigned int n = 1);
- for (;;)
+ /* Constants. */
+ enum
{
- n_ = pact_[state_];
- if (n_ != pact_ninf_)
- {
- n_ += terror_;
- if (0 <= n_ && n_ <= last_ && check_[n_] == terror_)
- {
- n_ = table_[n_];
- if (0 < n_)
- break;
- }
- }
-
- /* Pop the current state because it cannot handle the error token. */
- if (state_stack_.height () == 1)
- YYABORT;
-
-#if YYDEBUG
- if (debug_)
- {
- cdebug_ << "Error: popping ";
- symprint_ (stos_[state_], &semantic_stack_[0], &location_stack_[0]);
- cdebug_ << std::endl;
- }
-#endif
- destruct_ (stos_[state_], &semantic_stack_[0], &location_stack_[0]);
- error_start_ = location_stack_[0].begin;
-
- state_stack_.pop ();
- semantic_stack_.pop ();
- location_stack_.pop ();
- state_ = state_stack_[0];
- YY_STACK_PRINT ();
- }
+ yyeof_ = 0,
+ yylast_ = ]b4_last[, //< Last index in yytable_.
+ yynnts_ = ]b4_nterms_number[, //< Number of nonterminal symbols.
+ yyempty_ = -2,
+ yyfinal_ = ]b4_final_state_number[, //< Termination state number.
+ yyterror_ = 1,
+ yyerrcode_ = 256,
+ yyntokens_ = ]b4_tokens_number[ //< Number of tokens.
+ };
- if (n_ == final_)
- goto yyacceptlab;
-
- YYCDEBUG << "Shifting error token, ";
-
- {
- Location errloc;
- errloc.begin = error_start_;
- errloc.end = location.end;
- semantic_stack_.push (value);
- location_stack_.push (errloc);
- }
-
- state_ = n_;
- goto yynewstate;
+]b4_parse_param_vars[
+ };
- /* Accept. */
- yyacceptlab:
- return 0;
+]b4_lex_symbol_if([b4_yytranslate_define
+b4_public_types_define])[
+]b4_namespace_close[
- /* Abort. */
- yyabortlab:
- return 1;
-}
+]b4_percent_define_flag_if([[global_tokens_and_yystype]],
+[b4_token_defines(b4_tokens)
-void
-yy::]b4_parser_class_name[::lex_ ()
-{
-#if YYLSP_NEEDED
- looka_ = yylex (&value, &location);
-#else
- looka_ = yylex (&value);
+#ifndef YYSTYPE
+ /* Redirection for backward compatibility. */
+# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type
#endif
-}
-
-/** Generate an error message, and invoke yyerror. */
-void
-yy::]b4_parser_class_name[::report_syntax_error_ ()
-{
- /* If not already recovering from an error, report this error. */
- if (!errstatus_)
- {
- ++nerrs_;
-
-#if YYERROR_VERBOSE
- n_ = pact_[state_];
- if (pact_ninf_ < n_ && n_ < last_)
- {
- message = "syntax error, unexpected ";
- message += name_[ilooka_];
- {
- int count = 0;
- for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x)
- if (check_[x + n_] == x && x != terror_)
- ++count;
- if (count < 5)
- {
- count = 0;
- for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x)
- if (check_[x + n_] == x && x != terror_)
- {
- message += (!count++) ? ", expecting " : " or ";
- message += name_[x];
- }
- }
- }
- }
- else
+])
+b4_percent_code_get([[provides]])[]dnl
+
+[#endif /* ! defined PARSER_HEADER_H */]
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++])
+b4_percent_code_get([[top]])[]dnl
+m4_if(b4_prefix, [yy], [],
+[
+// Take the name prefix into account.
+#define yylex b4_prefix[]lex])[
+
+/* First part of user declarations. */
+]b4_user_pre_prologue[
+
+#include "@basename(]b4_spec_defines_file[@)"
+
+/* User implementation prologue. */
+]b4_user_post_prologue
+b4_percent_code_get[]dnl
+
+[#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
+# if ENABLE_NLS
+# include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
+# define YY_(msgid) dgettext ("bison-runtime", msgid)
+# endif
+# endif
+# ifndef YY_
+# define YY_(msgid) msgid
+# endif
#endif
- message = "syntax error";
- error_ ();
- }
-}
-
-
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
- STATE-NUM. */
-const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) yy::b4_parser_class_name::pact_ninf_ = b4_pact_ninf[;
-const ]b4_int_type_for([b4_pact])[
-yy::]b4_parser_class_name[::pact_[] =
-{
- ]b4_pact[
-};
-
-/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
- doesn't specify something else to do. Zero means the default is an
- error. */
-const ]b4_int_type_for([b4_defact])[
-yy::]b4_parser_class_name[::defact_[] =
-{
- ]b4_defact[
-};
-
-/* YYPGOTO[NTERM-NUM]. */
-const ]b4_int_type_for([b4_pgoto])[
-yy::]b4_parser_class_name[::pgoto_[] =
-{
- ]b4_pgoto[
-};
-
-/* YYDEFGOTO[NTERM-NUM]. */
-const ]b4_int_type_for([b4_defgoto])[
-yy::]b4_parser_class_name[::defgoto_[] =
-{
- ]b4_defgoto[
-};
-
-/* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
- positive, shift that token. If negative, reduce the rule which
- number is the opposite. If zero, do what YYDEFACT says. */
-const ]b4_int_type(b4_table_ninf, b4_table_ninf) yy::b4_parser_class_name::table_ninf_ = b4_table_ninf[;
-const ]b4_int_type_for([b4_table])[
-yy::]b4_parser_class_name[::table_[] =
-{
- ]b4_table[
-};
-
-/* YYCHECK. */
-const ]b4_int_type_for([b4_check])[
-yy::]b4_parser_class_name[::check_[] =
-{
- ]b4_check[
-};
-
-/* STOS_[STATE-NUM] -- The (internal number of the) accessing
- symbol of state STATE-NUM. */
-const ]b4_int_type_for([b4_stos])[
-yy::]b4_parser_class_name[::stos_[] =
-{
- ]b4_stos[
-};
-#if YYDEBUG
-/* TOKEN_NUMBER_[YYLEX-NUM] -- Internal token number corresponding
- to YYLEX-NUM. */
-const ]b4_int_type_for([b4_toknum])[
-yy::]b4_parser_class_name[::token_number_[] =
-{
- ]b4_toknum[
-};
-#endif
+]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). */
-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
-const ]b4_int_type_for([b4_r1])[
-yy::]b4_parser_class_name[::r1_[] =
-{
- ]b4_r1[
-};
-
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
-const ]b4_int_type_for([b4_r2])[
-yy::]b4_parser_class_name[::r2_[] =
-{
- ]b4_r2[
-};
-
-#if YYDEBUG || YYERROR_VERBOSE
-/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
- First, the terminals, then, starting at NTOKENS_, nonterminals. */
-const char*
-const yy::]b4_parser_class_name[::name_[] =
-{
- ]b4_tname[
-};
-#endif
+#define YYRHSLOC(Rhs, K) ((Rhs)[K].location)
+#ifndef YYLLOC_DEFAULT
+# define YYLLOC_DEFAULT(Current, Rhs, N) \
+ do \
+ if (N) \
+ { \
+ (Current).begin = YYRHSLOC (Rhs, 1).begin; \
+ (Current).end = YYRHSLOC (Rhs, N).end; \
+ } \
+ else \
+ { \
+ (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end; \
+ } \
+ while (false)
+#endif]])[
+
+/* Suppress unused-variable warnings by "using" E. */
+#define YYUSE(e) ((void) (e))
+/* Enable debugging if requested. */
#if YYDEBUG
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-const yy::]b4_parser_class_name[::RhsNumberType
-yy::]b4_parser_class_name[::rhs_[] =
-{
- ]b4_rhs[
-};
-
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
- YYRHS. */
-const ]b4_int_type_for([b4_prhs])[
-yy::]b4_parser_class_name[::prhs_[] =
-{
- ]b4_prhs[
-};
-
-/* YYRLINE[YYN] -- source line where rule number YYN was defined. */
-const ]b4_int_type_for([b4_rline])[
-yy::]b4_parser_class_name[::rline_[] =
-{
- ]b4_rline[
-};
-
-/** Print the state stack from its BOTTOM up to its TOP (included). */
-
-void
-yy::]b4_parser_class_name[::stack_print_ ()
-{
- cdebug_ << "state stack now";
- for (StateStack::ConstIterator 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 via 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;
-}
-#endif // YYDEBUG
-
-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
-yy::]b4_parser_class_name[::TokenNumberType
-yy::]b4_parser_class_name[::translate_ (int token)
-{
- static
- const TokenNumberType
- translate_table[] =
- {
- ]b4_translate[
- };
- if ((unsigned int) token <= user_token_number_max_)
- return translate_table[token];
- else
- return undef_token_;
-}
-
-const int yy::]b4_parser_class_name[::eof_ = 0;
-const int yy::]b4_parser_class_name[::last_ = ]b4_last[;
-const int yy::]b4_parser_class_name[::nnts_ = ]b4_nterms_number[;
-const int yy::]b4_parser_class_name[::empty_ = -2;
-const int yy::]b4_parser_class_name[::final_ = ]b4_final_state_number[;
-const int yy::]b4_parser_class_name[::terror_ = 1;
-const int yy::]b4_parser_class_name[::errcode_ = 256;
-const int yy::]b4_parser_class_name[::ntokens_ = ]b4_tokens_number[;
-
-const unsigned int yy::]b4_parser_class_name[::user_token_number_max_ = ]b4_user_token_number_max[;
-const yy::]b4_parser_class_name[::TokenNumberType yy::]b4_parser_class_name[::undef_token_ = ]b4_undef_token_number[;
-
-]b4_epilogue
-dnl
-@output stack.hh
-b4_copyright([Stack handling for Bison C++ parsers], [2002, 2003, 2004])[
-
-#ifndef BISON_STACK_HH
-# define BISON_STACK_HH
-
-#include <deque>
-
-namespace yy
-{
- template < class T, class S = std::deque< T > >
- class Stack
- {
- public:
-
- typedef typename S::iterator Iterator;
- typedef typename S::const_iterator ConstIterator;
- Stack () : seq_ ()
- {
- }
-
- Stack (unsigned int n) : seq_ (n)
- {
- }
-
- inline
- T&
- operator [] (unsigned int i)
- {
- return seq_[i];
- }
+/* A pseudo ostream that takes yydebug_ into account. */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)
+
+# define YY_SYMBOL_PRINT(Title, Symbol) \
+ do { \
+ if (yydebug_) \
+ { \
+ *yycdebug_ << Title << ' '; \
+ yy_print_ (*yycdebug_, Symbol); \
+ *yycdebug_ << std::endl; \
+ } \
+ } while (false)
+
+# define YY_REDUCE_PRINT(Rule) \
+ do { \
+ if (yydebug_) \
+ yy_reduce_print_ (Rule); \
+ } while (false)
+
+# define YY_STACK_PRINT() \
+ do { \
+ if (yydebug_) \
+ yystack_print_ (); \
+ } while (false)
- inline
- const T&
- operator [] (unsigned int i) const
- {
- return seq_[i];
- }
-
- inline
- void
- push (const T& t)
- {
- seq_.push_front (t);
- }
+#else /* !YYDEBUG */
- inline
- void
- pop (unsigned int n = 1)
- {
- for (; n; --n)
- seq_.pop_front ();
- }
+# define YYCDEBUG if (false) std::cerr
+# define YY_SYMBOL_PRINT(Title, Symbol) static_cast<void>(0)
+# define YY_REDUCE_PRINT(Rule) static_cast<void>(0)
+# define YY_STACK_PRINT() static_cast<void>(0)
- inline
- unsigned int
- height () const
- {
- return seq_.size ();
- }
+#endif /* !YYDEBUG */
- inline ConstIterator begin () const { return seq_.begin (); }
- inline ConstIterator end () const { return seq_.end (); }
+#define yyerrok (yyerrstatus_ = 0)
+#define yyclearin (yyempty = true)
- private:
+#define YYACCEPT goto yyacceptlab
+#define YYABORT goto yyabortlab
+#define YYERROR goto yyerrorlab
+#define YYRECOVERING() (!!yyerrstatus_)
- S seq_;
- };
+]b4_namespace_open[]b4_error_verbose_if([[
- template < class T, class S = Stack< T > >
- class Slice
+ /* 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)
{
- public:
-
- Slice (const S& stack,
- unsigned int range) : stack_ (stack),
- range_ (range)
- {
- }
+ if (*yystr == '"')
+ {
+ std::string yyr = "";
+ char const *yyp = yystr;
- inline
- const T&
- operator [] (unsigned int i) const
- {
- return stack_[range_ - i];
- }
+ 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: ;
+ }
- private:
+ return yystr;
+ }
+]])[
- const S& stack_;
- unsigned int range_;
- };
-}
+ /// 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[
+ {
+ }
-#endif // not BISON_STACK_HH]
-dnl
-@output position.hh
-b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004])[
+ ]b4_parser_class_name::~b4_parser_class_name[ ()
+ {
+ }
-/**
- ** \file position.hh
- ** Define the Location class.
- */
-#ifndef BISON_POSITION_HH
-# define BISON_POSITION_HH
+ /*---------------.
+ | Symbol types. |
+ `---------------*/
-# include <iostream>
-# include <string>
+]b4_lex_symbol_if([], [b4_public_types_define])[
-namespace yy
-{
- /** \brief Abstract a Position. */
- class Position
+ // stack_symbol_type.
+ ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
+ : super_type ()
+ , state ()
{
- 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)
- {
- }
- /** \} */
+ ]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)
+ {
+ }
+ int
+ ]b4_parser_class_name[::stack_symbol_type::type_get_ () const
+ {
+ return yystos_[state];
+ }
- /** \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;
- }
- /** \} */
+ template <typename Exact>
+ void
+ ]b4_parser_class_name[::yy_destroy_ (const char* yymsg,
+ symbol_base_type<Exact>& yysym) const
+ {
+ int yytype = yysym.type_get ();
+ YYUSE (yymsg);
+ if (yymsg)
+ YY_SYMBOL_PRINT (yymsg, yysym);
+
+ // User destructor.
+ switch (yytype)
+ {
+]b4_symbol_foreach([b4_symbol_destructor])dnl
+[ default:
+ break;
+ }]b4_variant_if([
+
+ // Type destructor.
+ b4_symbol_variant([[yytype]], [[yysym.value]], [[template destroy]])])[
+ }
- 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;
- };
+#if YYDEBUG
+ template <typename Exact>
+ void
+ ]b4_parser_class_name[::yy_print_ (std::ostream& yyo,
+ const symbol_base_type<Exact>& yysym) const
+ {
+ int yytype = yysym.type_get ();
+ yyo << (yytype < yyntokens_ ? "token" : "nterm")
+ << ' ' << yytname_[yytype] << " ("]b4_locations_if([
+ << yysym.location << ": "])[;
+ switch (yytype)
+ {
+]b4_symbol_foreach([b4_symbol_printer])dnl
+[ default:
+ break;
+ }
+ yyo << ')';
+ }
+#endif
- /** \brief Add and assign a Position. */
- inline const Position&
- operator+= (Position& res, const int width)
+ void
+ ]b4_parser_class_name[::yypush_ (const char* m, state_type s,
+ symbol_type& sym)
{
- res.columns (width);
- return res;
+ 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]))[));]])[
}
- /** \brief Add two Position objects. */
- inline const Position
- operator+ (const Position& begin, const int width)
+ void
+ ]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
{
- Position res = begin;
- return res += width;
+ 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);])[
}
- /** \brief Add and assign a Position. */
- inline const Position&
- operator-= (Position& res, const int width)
+ void
+ ]b4_parser_class_name[::yypop_ (unsigned int n)
{
- return res += -width;
+ yystack_.pop (n);
}
- /** \brief Add two Position objects. */
- inline const Position
- operator- (const Position& begin, const int width)
+#if YYDEBUG
+ std::ostream&
+ ]b4_parser_class_name[::debug_stream () const
{
- return begin + -width;
+ return *yycdebug_;
}
- /** \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)
+ void
+ ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
{
- if (!pos.filename.empty ())
- ostr << pos.filename << ':';
- return ostr << pos.line << '.' << pos.column;
+ yycdebug_ = &o;
}
-}
-#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.
- */
+ ]b4_parser_class_name[::debug_level_type
+ ]b4_parser_class_name[::debug_level () const
+ {
+ return yydebug_;
+ }
-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
+ void
+ ]b4_parser_class_name[::set_debug_level (debug_level_type l)
+ {
+ yydebug_ = l;
+ }
+#endif
-# include <iostream>
-# include <string>
-# include "position.hh"
+ inline ]b4_parser_class_name[::state_type
+ ]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yylhs)
+ {
+ int yyr = yypgoto_[yylhs - yyntokens_] + yystate;
+ if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
+ return yytable_[yyr];
+ else
+ return yydefgoto_[yylhs - yyntokens_];
+ }
-namespace yy
-{
+ inline bool
+ ]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
+ {
+ return yyvalue == yypact_ninf_;
+ }
- /** \brief Abstract a Location. */
- class Location
+ inline bool
+ ]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
{
- /** \name Ctor & dtor.
- ** \{ */
- public:
- /** \brief Construct a Location. */
- Location (void) :
- begin (),
- end ()
- {
- }
- /** \} */
+ return yyvalue == yytable_ninf_;
+ }
+ int
+ ]b4_parser_class_name[::parse ()
+ {
+ /// Whether yyla contains a lookahead.
+ bool yyempty = true;
- /** \name Line and Column related manipulators
- ** \{ */
- public:
- /** \brief Reset initial location to final location. */
- inline void step (void)
+ /* State. */
+ int yyn;
+ int yylen = 0;
+
+ /* Error handling. */
+ int yynerrs_ = 0;
+ int yyerrstatus_ = 0;
+
+ /// The lookahead symbol.
+ symbol_type yyla;]b4_locations_if([[
+
+ /// The locations where the error started and ended.
+ stack_symbol_type yyerror_range[3];]])[
+
+ /// $$ 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], [yyla.location])dnl
+m4_pushdef([b4_dollar_dollar], [yyla.value])dnl
+ /* User initialization code. */
+ b4_user_initial_action
+m4_popdef([b4_dollar_dollar])dnl
+m4_popdef([b4_at_dollar])])dnl
+
+ [ /* Initialize the stack. The initial state will be set in
+ yynewstate, since the latter expects the semantical and the
+ location values to have been already stored, initialize these
+ stacks with a primary value. */
+ yystack_ = stack_type (0);
+ yypush_ (0, 0, yyla);
+
+ // A new symbol was pushed on the stack.
+ yynewstate:
+ YYCDEBUG << "Entering state " << yystack_[0].state << std::endl;
+
+ /* Accept? */
+ if (yystack_[0].state == yyfinal_)
+ goto yyacceptlab;
+
+ goto yybackup;
+
+ /* Backup. */
+ yybackup:
+
+ /* Try to take a decision without lookahead. */
+ yyn = yypact_[yystack_[0].state];
+ if (yy_pact_value_is_default_ (yyn))
+ goto yydefault;
+
+ /* Read a lookahead token. */
+ if (yyempty)
+ {
+ YYCDEBUG << "Reading a token: ";
+]b4_lex_symbol_if(
+[ yyla = b4_c_function_call([yylex], [symbol_type],
+ m4_ifdef([b4_lex_param], b4_lex_param));],
+[ yyla.type = yytranslate_ (b4_c_function_call([yylex], [int],
+ [[YYSTYPE*], [&yyla.value]][]dnl
+b4_locations_if([, [[location*], [&yyla.location]]])dnl
+m4_ifdef([b4_lex_param], [, ]b4_lex_param)));])[
+ yyempty = false;
+ }
+ YY_SYMBOL_PRINT ("Next token is", yyla);
+
+ /* If the proper action on seeing token YYLA.TYPE is to reduce or
+ to detect an error, take that action. */
+ yyn += yyla.type;
+ if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type)
+ goto yydefault;
+
+ /* Reduce or error. */
+ yyn = yytable_[yyn];
+ if (yyn <= 0)
+ {
+ if (yy_table_value_is_error_ (yyn))
+ goto yyerrlab;
+ yyn = -yyn;
+ goto yyreduce;
+ }
+
+ /* Discard the token being shifted. */
+ yyempty = true;
+
+ /* Count tokens shifted since error; after three, turn off error
+ status. */
+ if (yyerrstatus_)
+ --yyerrstatus_;
+
+ /* Shift the lookahead token. */
+ yypush_ ("Shifting", yyn, yyla);
+ goto yynewstate;
+
+ /*-----------------------------------------------------------.
+ | yydefault -- do the default action for the current state. |
+ `-----------------------------------------------------------*/
+ yydefault:
+ yyn = yydefact_[yystack_[0].state];
+ if (yyn == 0)
+ goto yyerrlab;
+ goto yyreduce;
+
+ /*-----------------------------.
+ | yyreduce -- Do a reduction. |
+ `-----------------------------*/
+ yyreduce:
+ yylen = yyr2_[yyn];
+ yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
+ /* Variants are always initialized to an empty instance of the
+ correct type. The default $$=$1 action is NOT applied when using
+ variants. */
+ b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])],[
+ /* If YYLEN is nonzero, implement the default value of the action:
+ `$$ = $1'. Otherwise, use the top of the stack.
+
+ Otherwise, the following line sets YYLHS.VALUE to garbage.
+ This behavior is undocumented and Bison
+ users should not rely upon it. */
+ if (yylen)
+ yylhs.value = yystack_@{yylen - 1@}.value;
+ else
+ yylhs.value = yystack_@{0@}.value;])[
+]b4_locations_if([dnl
+[
+ // Compute the default @@$.
{
- begin = end;
- }
+ slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
+ YYLLOC_DEFAULT (yylhs.location, slice, yylen);
+ }]])[
- /** \brief Extend the current location to the COUNT next columns. */
- inline void columns (unsigned int count = 1)
+ // Perform the reduction.
+ YY_REDUCE_PRINT (yyn);
+ try
{
- end += count;
+ switch (yyn)
+ {
+]b4_user_actions[
+ default:
+ break;
+ }
}
-
- /** \brief Extend the current location to the COUNT next lines. */
- inline void lines (unsigned int count = 1)
+ catch (const syntax_error& yyexc)
{
- end.lines (count);
+ error (]b4_args(b4_locations_if([yyexc.location]),
+ [[yyexc.what()]])[);
+ YYERROR;
}
- /** \} */
+ YY_SYMBOL_PRINT ("-> $$ =", yylhs);
+]b4_variant_if([[
+ // Destroy the rhs symbols.
+ for (int i = 0; i < yylen; ++i)
+ // Destroy a variant which value may have been swapped with
+ // yylhs.value (for instance if the action was "std::swap($$,
+ // $1)"). The value of yylhs.value (hence possibly one of these
+ // rhs symbols) depends on the default contruction for this
+ // type. In the case of pointers for instance, no
+ // initialization is done, so the value is junk. Therefore do
+ // not try to report the value of symbols about to be destroyed
+ // in the debug trace, it's possibly junk. Hence yymsg = 0.
+ // Besides, that keeps exactly the same traces as with the other
+ // Bison skeletons.
+ yy_destroy_ (0, yystack_[i]);]])[
+
+ yypop_ (yylen);
+ yylen = 0;
+ YY_STACK_PRINT ();
+
+ /* Shift the result of the reduction. */
+ yypush_ (0, yylhs);
+ goto yynewstate;
+
+ /*--------------------------------------.
+ | yyerrlab -- here on detecting error. |
+ `--------------------------------------*/
+ yyerrlab:
+ /* If not already recovering from an error, report this error. */
+ if (!yyerrstatus_)
+ {
+ ++yynerrs_;
+ error (]b4_args(b4_locations_if([yyla.location]),
+ [[yysyntax_error_ (yystack_[0].state,
+ yyempty ? yyempty_ : yyla.type)]])[);
+ }
+
+]b4_locations_if([[
+ yyerror_range[1].location = yyla.location;]])[
+ if (yyerrstatus_ == 3)
+ {
+ /* If just tried and failed to reuse lookahead token after an
+ error, discard it. */
+
+ /* Return failure if at end of input. */
+ if (yyla.type == yyeof_)
+ YYABORT;
+ else if (!yyempty)
+ {
+ yy_destroy_ ("Error: discarding", yyla);
+ yyempty = true;
+ }
+ }
+
+ /* Else will try to reuse lookahead token after shifting the error
+ token. */
+ goto yyerrlab1;
+
+
+ /*---------------------------------------------------.
+ | yyerrorlab -- error raised explicitly by YYERROR. |
+ `---------------------------------------------------*/
+ yyerrorlab:
+
+ /* Pacify compilers like GCC when the user code never invokes
+ YYERROR and the label yyerrorlab therefore never appears in user
+ code. */
+ if (false)
+ goto yyerrorlab;]b4_locations_if([[
+ yyerror_range[1].location = yystack_[yylen - 1].location;]])b4_variant_if([[
+ /* $$ was initialized before running the user action. */
+ yy_destroy_ ("Error: discarding", yylhs);]])[
+ /* Do not reclaim the symbols of the rule which action triggered
+ this YYERROR. */
+ yypop_ (yylen);
+ yylen = 0;
+ goto yyerrlab1;
+
+ /*-------------------------------------------------------------.
+ | yyerrlab1 -- common code for both syntax error and YYERROR. |
+ `-------------------------------------------------------------*/
+ yyerrlab1:
+ yyerrstatus_ = 3; /* Each real token shifted decrements this. */
+ {
+ stack_symbol_type error_token;
+ for (;;)
+ {
+ yyn = yypact_[yystack_[0].state];
+ if (!yy_pact_value_is_default_ (yyn))
+ {
+ yyn += yyterror_;
+ if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
+ {
+ yyn = yytable_[yyn];
+ if (0 < yyn)
+ break;
+ }
+ }
+ // Pop the current state because it cannot handle the error token.
+ if (yystack_.size () == 1)
+ YYABORT;
+]b4_locations_if([[
+ yyerror_range[1].location = yystack_[0].location;]])[
+ yy_destroy_ ("Error: popping", yystack_[0]);
+ yypop_ ();
+ YY_STACK_PRINT ();
+ }
+]b4_locations_if([[
+ yyerror_range[2].location = yyla.location;
+ YYLLOC_DEFAULT (error_token.location, yyerror_range, 2);]])[
- public:
- /** \brief Beginning of the located region. */
- Position begin;
- /** \brief End of the located region. */
- Position end;
- };
+ /* Shift the error token. */
+ error_token.state = yyn;
+ yypush_ ("Shifting", error_token);
+ }
+ goto yynewstate;
+
+ /* Accept. */
+ yyacceptlab:
+ yyresult = 0;
+ goto yyreturn;
+
+ /* Abort. */
+ yyabortlab:
+ yyresult = 1;
+ goto yyreturn;
+
+ yyreturn:
+ if (!yyempty)
+ yy_destroy_ ("Cleanup: discarding lookahead", yyla);
+
+ /* Do not reclaim the symbols of the rule which action triggered
+ this YYABORT or YYACCEPT. */
+ yypop_ (yylen);
+ while (yystack_.size () != 1)
+ {
+ yy_destroy_ ("Cleanup: popping", yystack_[0]);
+ yypop_ ();
+ }
+
+ return yyresult;
+ }
- /** \brief Join two Location objects to create a Location. */
- inline const Location operator+ (const Location& begin, const Location& end)
- {
- Location res = begin;
- res.end = end.end;
- return res;
+ // Generate an error message.
+ std::string
+ ]b4_parser_class_name[::yysyntax_error_ (]dnl
+b4_error_verbose_if([state_type yystate, int yytoken],
+ [int, int])[)
+ {]b4_error_verbose_if([[
+ std::string yyres;
+ // Number of reported tokens (one for the "unexpected", one per
+ // "expected").
+ size_t yycount = 0;
+ // Its maximum.
+ enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+ // Arguments of yyformat.
+ char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
+
+ /* There are many possibilities here to consider:
+ - If this state is a consistent state with a default action, then
+ the only way this function was invoked is if the default action
+ is an error action. In that case, don't check for expected
+ tokens because there are none.
+ - The only way there can be no lookahead present (in yytoken) is
+ if this state is a consistent state with a default action.
+ Thus, detecting the absence of a lookahead is sufficient to
+ determine that there is no unexpected or expected token to
+ report. In that case, just report a simple "syntax error".
+ - Don't assume there isn't a lookahead just because this state is
+ a consistent state with a default action. There might have
+ been a previous inconsistent state, consistent state with a
+ non-default action, or user semantic action that manipulated
+ yyla. (However, yyla is currently not documented for users.)
+ - Of course, the expected token list depends on states to have
+ correct lookahead information, and it depends on the parser not
+ to perform extra reductions after fetching a lookahead from the
+ scanner and before detecting a syntax error. Thus, state
+ merging (from LALR or IELR) and default reductions corrupt the
+ expected token list. However, the list is correct for
+ canonical LR with one exception: it will still contain any
+ token that will not be accepted due to an error action in a
+ later state.
+ */
+ if (yytoken != yyempty_)
+ {
+ yyarg[yycount++] = yytname_[yytoken];
+ int yyn = yypact_[yystate];
+ if (!yy_pact_value_is_default_ (yyn))
+ {
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. In other words, skip the first -YYN actions for
+ this state because they are default actions. */
+ int yyxbegin = yyn < 0 ? -yyn : 0;
+ /* Stay within bounds of both yycheck and yytname. */
+ int yychecklim = yylast_ - yyn + 1;
+ int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+ for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
+ if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
+ && !yy_table_value_is_error_ (yytable_[yyx + yyn]))
+ {
+ if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
+ {
+ yycount = 1;
+ break;
+ }
+ else
+ yyarg[yycount++] = yytname_[yyx];
+ }
+ }
+ }
+
+ char const* yyformat = 0;
+ switch (yycount)
+ {
+#define YYCASE_(N, S) \
+ case N: \
+ yyformat = S; \
+ break
+ YYCASE_(0, YY_("syntax error"));
+ YYCASE_(1, YY_("syntax error, unexpected %s"));
+ YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+ YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+ YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+ YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+ }
+
+ // Argument number.
+ size_t yyi = 0;
+ for (char const* yyp = yyformat; *yyp; ++yyp)
+ if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)
+ {
+ yyres += yytnamerr_ (yyarg[yyi++]);
+ ++yyp;
+ }
+ else
+ yyres += *yyp;
+ return yyres;]], [[
+ return YY_("syntax error");]])[
}
- /** \brief Add two Location objects */
- inline const Location operator+ (const Location& begin, unsigned int width)
+
+ const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[;
+
+ const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
+
+]b4_parser_tables_define[
+
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+ /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+ First, the terminals, then, starting at \a yyntokens_, nonterminals. */
+ const char*
+ const ]b4_parser_class_name[::yytname_[] =
{
- Location res = begin;
- res.columns (width);
- return res;
- }
+ ]b4_tname[
+ };
+#endif
- /** \brief Add and assign a Location */
- inline Location &operator+= (Location& res, unsigned int width)
+#if YYDEBUG
+]b4_integral_parser_table_define([rline], [b4_rline])[
+
+ // Print the state stack on the debug stream.
+ void
+ ]b4_parser_class_name[::yystack_print_ ()
{
- res.columns (width);
- return res;
+ *yycdebug_ << "Stack now";
+ for (stack_type::const_iterator
+ i = yystack_.begin (),
+ i_end = yystack_.end ();
+ i != i_end; ++i)
+ *yycdebug_ << ' ' << i->state;
+ *yycdebug_ << std::endl;
}
- /** \brief Intercept output stream redirection.
- ** \param ostr the destination output stream
- ** \param loc a reference to the Location to redirect
- **
- ** Avoid duplicate information.
- */
- inline std::ostream& operator<< (std::ostream& ostr, const Location& loc)
+ // Report on the debug stream that the rule \a yyrule is going to be reduced.
+ void
+ ]b4_parser_class_name[::yy_reduce_print_ (int yyrule)
{
- Position last = loc.end - 1;
- ostr << loc.begin;
- if (loc.begin.filename != last.filename)
- ostr << '-' << last;
- else if (loc.begin.line != last.line)
- ostr << '-' << last.line << '.' << last.column;
- else if (loc.begin.column != last.column)
- ostr << '-' << last.column;
- return ostr;
+ unsigned int yylno = yyrline_[yyrule];
+ int yynrhs = yyr2_[yyrule];
+ /* Print the symbols being reduced, and their result. */
+ *yycdebug_ << "Reducing stack by rule " << yyrule - 1
+ << " (line " << yylno << "):" << std::endl;
+ /* The symbols being reduced. */
+ for (int yyi = 0; yyi < yynrhs; yyi++)
+ YY_SYMBOL_PRINT (" $" << yyi + 1 << " =",
+ ]b4_rhs_data(yynrhs, yyi + 1)[);
}
+#endif // YYDEBUG
-}
-
-#endif // not BISON_LOCATION_HH]
+]b4_lex_symbol_if([], [b4_yytranslate_define])[
+]b4_namespace_close[
+]b4_epilogue[]dnl
+m4_divert_pop(0)
+m4_popdef([b4_copyright_years])dnl
projects / bison.git / blobdiff