-m4_divert(-1)
# C++ skeleton for Bison
-# Copyright (C) 2002 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+# Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
-
+#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
-
+#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
-
-m4_include([c.m4])
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+m4_include(b4_pkgdatadir/[c++.m4])
+
+
+# b4_args(ARG1, ...)
+# _b4_args(ARG1, ...)
+# -------------------
+# Join with comma, skipping empty arguments.
+# b4_args calls itself recursively until it sees the first non-empty
+# argument, then calls _b4_args which prepends each non-empty argument
+# with a comma.
+m4_define([b4_args],
+[m4_if([$#$1],
+ [1], [],
+ [m4_ifval([$1],
+ [$1[]_$0(m4_shift($@))],
+ [$0(m4_shift($@))])])])
+
+# _b4_args(ARGS1, ...)
+# --------------------
+m4_define([_b4_args],
+[m4_if([$#$1],
+ [1], [],
+ [m4_ifval([$1], [, $1])[]$0(m4_shift($@))])])
+
+
+# b4_table_define(TABLE-NAME, CONTENT)
+# ------------------------------------
+# Define "parser::yy<TABLE-NAME>_" which contents is CONTENT.
+m4_define([b4_table_define],
+[const b4_int_type_for([$2])
+ b4_parser_class_name::yy$1_[[]] =
+ {
+ $2
+ }dnl
+])
+
+# b4_symbol_value_template(VAL, [TYPE])
+# -------------------------------------
+# Same as b4_symbol_value, but used in a template method.
+m4_copy([b4_symbol_value], [b4_symbol_value_template])
+
+# How the semantic value is extracted when using variants.
+b4_variant_if([
+ # b4_symbol_value(VAL, [TYPE])
+ # ----------------------------
+ m4_define([b4_symbol_value],
+ [m4_ifval([$2],
+ [$1.as<$2>()],
+ [$1])])
+
+ # b4_symbol_value_template(VAL, [TYPE])
+ # -------------------------------------
+ # Same as b4_symbol_value, but used in a template method.
+ m4_define([b4_symbol_value_template],
+ [m4_ifval([$2],
+ [$1.template as<$2>()],
+ [$1])])
+]) # b4_variant_if
+
+
+# b4_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])])
-## ---------------- ##
-## Default values. ##
-## ---------------- ##
-# Stack parameters.
-m4_define_default([b4_stack_depth_init], [200])
+# b4_lhs_value([TYPE])
+# --------------------
+# Expansion of $<TYPE>$.
+m4_define([b4_lhs_value],
+[b4_symbol_value([yylhs.value], [$1])])
-# Default Parser class name.
-m4_define_default([b4_parser_class_name], [Parser])
+# b4_lhs_location()
+# -----------------
+# Expansion of @$.
+m4_define([b4_lhs_location],
+[yylhs.location])
-## ----------------- ##
-## Semantic Values. ##
-## ----------------- ##
+# b4_rhs_data(RULE-LENGTH, NUM)
+# -----------------------------
+# Return the data corresponding to the symbol #NUM, where the current
+# rule has RULE-LENGTH symbols on RHS.
+m4_define([b4_rhs_data],
+ [yystack_@{($1) - ($2)@}])
-# b4_lhs_value([TYPE])
-# --------------------
-# Expansion of $<TYPE>$.
-m4_define([b4_lhs_value],
-[yyval[]m4_ifval([$1], [.$1])])
+# 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])@}])
+ [b4_rhs_data([$1], [$2]).location])
+
+
+# b4_symbol(NUM, FIELD)
+# ---------------------
+# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
+# undefined.
+m4_define([b4_symbol],
+[m4_indir([b4_symbol($1, $2)])])
+
+
+# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE)
+# -------------------------------------------
+# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE.
+# Otherwise an error.
+m4_define([b4_symbol_if],
+[m4_case(b4_symbol([$1], [$2]),
+ [1], [$3],
+ [0], [$4],
+ [m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])])
+
+
+# b4_symbol_actions(FILENAME, LINENO,
+# SYMBOL-TAG, SYMBOL-NUM,
+# SYMBOL-ACTION, SYMBOL-TYPENAME)
+# -------------------------------------------------
+# Same as in C, but using references instead of pointers.
+m4_define([b4_symbol_actions],
+[m4_pushdef([b4_dollar_dollar],
+ [b4_symbol_value_template([yysym.value], [$6])])dnl
+m4_pushdef([b4_at_dollar], [yysym.location])dnl
+ case $4: // $3
+b4_syncline([$2], [$1])
+ $5;
+b4_syncline([@oline@], [@ofile@])
+ break;
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# b4_symbol_case_(SYMBOL-NUM)
+# ---------------------------
+# Issue a "case NUM" for SYMBOL-NUM.
+m4_define([b4_symbol_case_],
+[ case b4_symbol([$1], [number]): // b4_symbol([$1], [tag])
+])
+
+
+# b4_type_action_(NUMS)
+# ---------------------
+# Run actions for the symbol NUMS that all have the same type-name.
+# Skip NUMS that have no type-name.
+m4_define([b4_type_action_],
+[b4_symbol_if([$1], [has_type],
+[m4_map([b4_symbol_case_], [$@])[]dnl
+ b4_dollar_dollar([b4_symbol([$1], [number])],
+ [b4_symbol([$1], [tag])],
+ [b4_symbol([$1], [type])]);
+ break;
+
+])])
+
+
+# b4_symbol_constructor_declaration_(SYMBOL-NUMBERS)
+# ----------------------------------------------------
+# Declare the overloaded version of make_symbol for the (common) type of
+# these SYMBOL-NUMBERS. Use at class-level.
+m4_define([b4_symbol_constructor_declaration_],
+[ template <token_type>
+ static inline symbol_type
+ make_symbol (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 the overloaded versions of make_symbol for all the value types.
+# Use at class-level.
+m4_define([b4_symbol_constructor_declarations],
+[b4_variant_if([
+ // Declaration of make_symbol for each value type.
+m4_map([b4_symbol_constructor_declaration_], m4_defn([b4_type_names]))])])
+
+
+
+# b4_symbol_constructor_specialization_(SYMBOL-NUMBER)
+# ----------------------------------------------------
+# Declare the specialization of make_symbol for this each SYMBOL-NUMBER.
+# Specializations cannot be declared at class-level, this must be done
+# at namespace-level.
+m4_define([b4_symbol_constructor_specialization_],
+[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
+[ template <>
+ inline
+ b4_parser_class_name::symbol_type
+ b4_parser_class_name::make_symbol <b4_parser_class_name::token::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_specializations
+# -------------------------------------
+# Declare specializations of make_symbol.
+m4_define([b4_symbol_constructor_specializations],
+[b4_variant_if([
+ // Specializations of make_symbol for each symbol type.
+m4_map([b4_symbol_constructor_specialization_],
+ m4_defn([b4_symbol_numbers]))])dnl
+])
+
+
+
+# b4_symbol_constructor_definition_(SYMBOL-NUMBER)
+# ------------------------------------------------
+# Define make_symbol for this SYMBOL-NUMBER.
+m4_define([b4_symbol_constructor_definition_],
+[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
+[ template <>
+ b4_parser_class_name::symbol_type
+ b4_parser_class_name::make_symbol <b4_parser_class_name::token::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_declarations
+# ----------------------------------
+# Define the overloaded versions of make_symbol for all the value types.
+m4_define([b4_symbol_constructor_definitions],
+[b4_variant_if(
+[ // Implementation of make_symbol for each symbol type.
+m4_map([b4_symbol_constructor_definition_], m4_defn([b4_symbol_numbers]))])])
+
+
+# b4_symbol_variant(YYTYPE, YYVAL, ACTION, [ARGS])
+# ------------------------------------------------
+# Run some ACTION ("build", or "destroy") on YYVAL of symbol type
+# YYTYPE.
+m4_define([b4_symbol_variant],
+[m4_pushdef([b4_dollar_dollar],
+ [$2.$3<$][3>(m4_shift3($@))])dnl
+ switch ($1)
+ {
+m4_map([b4_type_action_], m4_defn([b4_type_names]))[]dnl
+ default:
+ break;
+ }
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# _b4_char_sizeof_counter
+# -----------------------
+# A counter used by _b4_char_sizeof_dummy to create fresh symbols.
+m4_define([_b4_char_sizeof_counter],
+[0])
+
+# _b4_char_sizeof_dummy
+# ---------------------
+# At each call return a new C++ identifier.
+m4_define([_b4_char_sizeof_dummy],
+[m4_define([_b4_char_sizeof_counter], m4_incr(_b4_char_sizeof_counter))dnl
+dummy[]_b4_char_sizeof_counter])
+
+
+# b4_char_sizeof_(SYMBOL-NUM)
+# ---------------------------
+# 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],
+[[ // YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.
+ ]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<int>(t) <= yyeof_)
+ return yyeof_;
+ else if (static_cast<unsigned int> (t) <= user_token_number_max_)
+ return translate_table[t];
+ else
+ return undef_token_;
+ }
+]])
-m4_define([b4_inherit],
- [m4_ifdef([b4_root],
- [: public b4_root
-],
- [])])
-m4_define([b4_param],
- [m4_ifdef([b4_root],
- [,
- const Param& param],
- [])])
+m4_pushdef([b4_copyright_years],
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008])
-m4_define([b4_constructor],
- [m4_ifdef([b4_root],
- [b4_root (param),
- ],
- [])])
+m4_define([b4_parser_class_name],
+ [b4_percent_define_get([[parser_class_name]])])
+# The header is mandatory.
+b4_defines_if([],
+ [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
+
+b4_locations_if(
+[# Backward compatibility.
+m4_define([b4_location_constructors])
+m4_include(b4_pkgdatadir/[location.cc])])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
-@output @output_header_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002])
-#ifndef YYLSP_NEEDED
-# define YYLSP_NEEDED
+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. */
-#include "stack.hh"
-#include "location.hh"
+#ifndef PARSER_HEADER_H
+# define PARSER_HEADER_H
+]b4_percent_code_get([[requires]])[
+
+]b4_assert_if([#include <cassert>])[
#include <string>
#include <iostream>
+#include "stack.hh"
-/* Using locations. */
-#define YYLSP_NEEDED b4_locations_flag
+]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 <size_t S>
+ 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 <typename T>
+ inline T&
+ build()
+ {]b4_assert_if([
+ assert(!built);
+ built = true;])[
+ return *new (buffer) T;
+ }
-b4_token_defines(b4_tokens)
+ /// Instantiate a \a T in here from \a t.
+ template <typename T>
+ inline T&
+ build(const T& t)
+ {]b4_assert_if([
+ assert(!built);
+ built = true;])[
+ return *new (buffer) T(t);
+ }
-/* Copy the first part of user declarations. */
-b4_pre_prologue
+ /// Construct and fill.
+ template <typename T>
+ inline
+ variant (const T& t)]b4_assert_if([
+ : built(true)])[
+ {
+ new (buffer) T(t);
+ }
-/* Line __line__ of __file__. */
-b4_syncline([@oline@], [@ofile@])
+ /// Accessor to a built \a T.
+ template <typename T>
+ inline T&
+ as()
+ {]b4_assert_if([
+ assert(built);])[
+ return reinterpret_cast<T&>(buffer);
+ }
+
+ /// Const accessor to a built \a T (for %printer).
+ template <typename T>
+ inline const T&
+ as() const
+ {]b4_assert_if([
+ assert(built);])[
+ return reinterpret_cast<const T&>(buffer);
+ }
+
+ /// Swap the content with \a other.
+ template <typename T>
+ inline void
+ swap(variant<S>& other)
+ {
+ std::swap(as<T>(), other.as<T>());
+ }
+
+ /// Assign the content of \a other to this.
+ /// Destroys \a other.
+ template <typename T>
+ inline void
+ build(variant<S>& other)
+ {
+ build<T>();
+ swap<T>(other);
+ other.destroy<T>();
+ }
+
+ /// Destroy the stored \a T.
+ template <typename T>
+ inline void
+ destroy()
+ {
+ as<T>().~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
-# define YYDEBUG b4_debug
+# define YYDEBUG ]b4_debug_flag[
#endif
-/* Enabling verbose error message. */
-#ifndef YYERROR_VERBOSE
-# define YYERROR_VERBOSE b4_error_verbose
+/* Enabling verbose error messages. */
+#ifdef YYERROR_VERBOSE
+# undef YYERROR_VERBOSE
+# define YYERROR_VERBOSE 1
+#else
+# define YYERROR_VERBOSE ]b4_error_verbose_flag[
#endif
-#ifndef YYSTYPE
-m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_filename])
-typedef union b4_stype yystype;
-/* Line __line__ of __file__. */
-b4_syncline([@oline@], [@ofile@])],
-[typedef int yystype;])
-# define YYSTYPE yystype
+/* Enabling the token table. */
+#ifndef YYTOKEN_TABLE
+# define YYTOKEN_TABLE ]b4_token_table[
#endif
-/* Copy the second part of user declarations. */
-b4_post_prologue
+]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). */
-/* Line __line__ of __file__. */
-b4_syncline([@oline@], [@ofile@])
#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N) \
- Current.last_line = Rhs[[N]].last_line; \
- Current.last_column = Rhs[[N]].last_column;
-#endif
-
-namespace yy
-{
- class b4_parser_class_name;
-
- template < typename P >
- struct Traits
- {
- };
-
- template < >
- struct Traits< b4_parser_class_name >
- {
- typedef b4_int_type_for([b4_translate]) TokenNumberType;
- typedef b4_int_type_for([b4_rhs]) RhsNumberType;
- typedef int StateType;
- typedef yystype SemanticType;
- typedef b4_location_type LocationType;
- };
-}
-
-namespace yy
-{
- class b4_parser_class_name b4_inherit
+# define YYLLOC_DEFAULT(Current, Rhs, N) \
+do { \
+ if (N) \
+ { \
+ (Current).begin = (Rhs)[1].location.begin; \
+ (Current).end = (Rhs)[N].location.end; \
+ } \
+ else \
+ { \
+ (Current).begin = (Current).end = (Rhs)[0].location.end; \
+ } \
+} while (false)
+#endif]])[
+
+]b4_namespace_open[
+
+ /// A Bison parser.
+ class ]b4_parser_class_name[
{
public:
-
- 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_constructor[]debug_ (debug),
- cdebug_ (std::cerr),
- initlocation_ (initlocation)
+#ifndef YYSTYPE
+]b4_variant_if(
+[ /// An auxiliary type to compute the largest semantic type.
+ union union_type
+ {]m4_map([b4_char_sizeof], m4_defn([b4_type_names]))[};
+
+ /// Symbol semantic values.
+ typedef variant<sizeof(union_type)> semantic_type;],
+[ /// Symbol semantic values.
+m4_ifdef([b4_stype],
+[ union semantic_type
+ {b4_user_stype
+ };],
+[m4_if(b4_tag_seen_flag, 0,
+[[ typedef int semantic_type;]],
+[[ typedef YYSTYPE semantic_type;]])])])[
#else
- b4_parser_class_name (bool debug[]b4_param) :
- b4_constructor[]debug_ (debug),
- cdebug_ (std::cerr)
-#endif
+ typedef YYSTYPE semantic_type;
+#endif]b4_locations_if([
+ /// Symbol locations.
+ typedef b4_percent_define_get([[location_type]]) location_type;])[
+ /// Tokens.
+ struct token
{
- }
+ ]b4_token_enums(b4_tokens)[
+ };
+ /// Token type.
+ typedef token::yytokentype token_type;
- virtual ~b4_parser_class_name ()
- {
- }
+ /// Build a parser object.
+ ]b4_parser_class_name[ (]b4_parse_param_decl[);
+ virtual ~]b4_parser_class_name[ ();
+ /// Parse.
+ /// \returns 0 iff parsing succeeded.
virtual int parse ();
+#if YYDEBUG
+ /// The current debugging stream.
+ std::ostream& debug_stream () const;
+ /// Set the current debugging stream.
+ void set_debug_stream (std::ostream &);
+
+ /// Type for debugging levels.
+ typedef int debug_level_type;
+ /// The current debugging level.
+ debug_level_type debug_level () const;
+ /// Set the current debugging level.
+ void set_debug_level (debug_level_type l);
+#endif
+
private:
+ /// Report a syntax error.]b4_locations_if([
+ /// \param loc where the syntax error is found.])[
+ /// \param msg a description of the syntax error.
+ virtual void error (]b4_locations_if([const location_type& loc, ])[const std::string& msg);
- virtual void lex_ ();
- virtual void error_ ();
- virtual void print_ ();
+ /// Generate an error message.
+ /// \param state the state where the error occurred.
+ /// \param tok the lookahead token.
+ virtual std::string yysyntax_error_ (int yystate, int tok);
- /* Stacks. */
- StateStack state_stack_;
- SemanticStack semantic_stack_;
- LocationStack location_stack_;
+ /// State numbers.
+ typedef int state_type;
+ /// Internal symbol numbers.
+ typedef ]b4_int_type_for([b4_translate])[ token_number_type;
/* Tables. */
- static const b4_int_type_for([b4_pact]) pact_[[]];
- static const b4_int_type_for([b4_pact]) 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_for([b4_table]) table_ninf_;
- static const b4_int_type_for([b4_check]) check_[[]];
- static const b4_int_type_for([b4_r1]) r1_[[]];
- static const b4_int_type_for([b4_r2]) r2_[[]];
-
-#if YYDEBUG || YYERROR_VERBOSE
- static const char* const name_[[]];
+ /// For a state, the index in \a yytable_ of its portion.
+ static const ]b4_int_type_for([b4_pact])[ yypact_[];
+ static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
+
+ /// For a state, default rule to reduce.
+ /// Unless\a yytable_ specifies something else to do.
+ /// Zero means the default is an error.
+ static const ]b4_int_type_for([b4_defact])[ yydefact_[];
+
+ static const ]b4_int_type_for([b4_pgoto])[ yypgoto_[];
+ static const ]b4_int_type_for([b4_defgoto])[ yydefgoto_[];
+
+ /// What to do in a state.
+ /// \a yytable_[yypact_[s]]: what to do in state \a s.
+ /// - if positive, shift that token.
+ /// - if negative, reduce the rule which number is the opposite.
+ /// - if zero, do what YYDEFACT says.
+ static const ]b4_int_type_for([b4_table])[ yytable_[];
+ static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
+
+ static const ]b4_int_type_for([b4_check])[ yycheck_[];
+
+ /// For a state, its accessing symbol.
+ static const ]b4_int_type_for([b4_stos])[ yystos_[];
+
+ /// For a rule, its LHS.
+ static const ]b4_int_type_for([b4_r1])[ yyr1_[];
+ /// For a rule, its RHS length.
+ static const ]b4_int_type_for([b4_r2])[ yyr2_[];
+
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+ /// For a symbol, its name in clear.
+ static const char* const yytname_[];
+#endif]b4_error_verbose_if([
+
+ /// Convert the symbol name \a n to a form suitable for a diagnostic.
+ static std::string yytnamerr_ (const char *n);])[
+
+#if YYDEBUG
+ /// For each rule, its source line number.
+ static const ]b4_int_type_for([b4_rline])[ yyrline_[];
+ /// For each scanner token number, its symbol number.
+ static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[];
+ /// Report on the debug stream that the rule \a r is going to be reduced.
+ virtual void yy_reduce_print_ (int r);
+ /// Print the state stack on the debug stream.
+ virtual void yystack_print_ ();
+
+ /* Debugging. */
+ int yydebug_;
+ std::ostream* yycdebug_;
#endif
- /* More tables, for debugging. */
+ /// Convert a scanner token number \a t to a symbol number.
+ static token_number_type yytranslate_ (]b4_lex_symbol_if([token_type], [int])[ t);
+
+ /// A complete symbol, with its type.
+ template <typename Exact>
+ 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
- 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_stos]) stos_[[]];
- static const b4_int_type_for([b4_toknum]) token_number_[[]];
+ /// \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
- /* Even more tables. */
- static inline TokenNumberType translate_ (int token);
+ /// \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;
- /* 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 int initdepth_;
- static const unsigned user_token_number_max_;
- static const TokenNumberType undef_token_;
+ public:
+ /// Element of the stack: a state and its attributes.
+ struct symbol_type : symbol_base_type<symbol_type>
+ {
+ /// The parent class.
+ typedef symbol_base_type<symbol_type> super_type;
- /* State. */
- int n_;
- int len_;
- int state_;
+ /// Default constructor.
+ inline symbol_type ();
- /* Debugging. */
- int debug_;
- std::ostream &cdebug_;
+ /// 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;
+ };
+
+]b4_symbol_constructor_declarations[
+
+ private:
+ /// Element of the stack: a state and its attributes.
+ struct stack_symbol_type : symbol_base_type<stack_symbol_type>
+ {
+ /// The parent class.
+ typedef symbol_base_type<stack_symbol_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;
- /* Lookahead and lookahead in internal form. */
- int looka_;
- int ilooka_;
+ /// Return the type corresponding to this state.
+ inline int type_get_ () const;
+ };
- /* Message. */
- std::string message;
+ /// Stack type.
+ typedef stack<stack_symbol_type> stack_type;
- /* Semantic value and location of lookahead token. */
- SemanticType value;
- LocationType location;
+ /// The stack.
+ stack_type yystack_;
- /* @@$ and $$. */
- SemanticType yyval;
- LocationType yyloc;
+ /// Push a new state on the stack.
+ /// \param m a debug message to display
+ /// if null, no trace is output.
+ /// \param s the symbol
+ /// \warning the contents of \a s.value is stolen.
+ inline void yypush_ (const char* m, stack_symbol_type& s);
- /* Initial location. */
- LocationType initlocation_;
+ /// Push a new look ahead token on the state on the stack.
+ /// \param m a debug message to display
+ /// if null, no trace is output.
+ /// \param s the state
+ /// \param sym the symbol (for its value and location).
+ /// \warning the contents of \a s.value is stolen.
+ inline void yypush_ (const char* m, state_type s, symbol_type& sym);
+
+ /// Pop \a n symbols the three stacks.
+ inline void yypop_ (unsigned int n = 1);
+
+ /* Constants. */
+ enum
+ {
+ yyeof_ = 0,
+ yylast_ = ]b4_last[, //< Last index in yytable_.
+ yynnts_ = ]b4_nterms_number[, //< Number of nonterminal symbols.
+ yyempty_ = -2,
+ yyfinal_ = ]b4_final_state_number[, //< Termination state number.
+ yyterror_ = 1,
+ yyerrcode_ = 256,
+ yyntokens_ = ]b4_tokens_number[, //< Number of tokens.
+ };
+
+]b4_parse_param_vars[
};
-}
+]b4_symbol_constructor_specializations[
+]b4_namespace_close[
+
+]b4_percent_define_flag_if([[global_tokens_and_yystype]],
+[b4_token_defines(b4_tokens)
-#endif /* ! defined YYLSP_NEEDED */
-dnl
-@output @output_parser_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002])
+#ifndef YYSTYPE
+ /* Redirection for backward compatibility. */
+# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type
+#endif
+])
+b4_percent_code_get([[provides]])[]dnl
+
+[#endif /* ! defined PARSER_HEADER_H */]
+@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 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
-#include @output_header_name@
+/* Suppress unused-variable warnings by "using" E. */
+#define YYUSE(e) ((void) (e))
/* Enable debugging if requested. */
#if YYDEBUG
-# define YYCDEBUG if (debug_) cdebug_
+
+/* A pseudo ostream that takes yydebug_ into account. */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)
+
+# define YY_SYMBOL_PRINT(Title, 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)
+
#else /* !YYDEBUG */
-# define YYCDEBUG if (0) cdebug_
-#endif /* !YYDEBUG */
-int
-yy::b4_parser_class_name::parse ()
-{
- int nerrs = 0;
- int errstatus = 0;
-
- /* Initialize stack. */
- state_stack_ = StateStack (0);
- semantic_stack_ = SemanticStack (1);
- location_stack_ = LocationStack (1);
-
- /* Start. */
- state_ = 0;
- looka_ = empty_;
-#if YYLSP_NEEDED
- location = initlocation_;
-#endif
- YYCDEBUG << "Starting parse" << std::endl;
+# 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)
- /* New state. */
- yynewstate:
- state_stack_.push (state_);
- YYCDEBUG << "Entering state " << state_ << std::endl;
- goto yybackup;
+#endif /* !YYDEBUG */
- /* Backup. */
- yybackup:
+#define yyerrok (yyerrstatus_ = 0)
+#define yyclearin (yyempty = true)
- /* Try to take a decision without lookahead. */
- n_ = pact_[[state_]];
- if (n_ == pact_ninf_)
- goto yydefault;
+#define YYACCEPT goto yyacceptlab
+#define YYABORT goto yyabortlab
+#define YYERROR goto yyerrorlab
+#define YYRECOVERING() (!!yyerrstatus_)
- /* Read a lookahead token. */
- if (looka_ == empty_)
- {
- YYCDEBUG << "Reading a token: ";
- lex_ ();
- }
+]b4_namespace_open[]b4_error_verbose_if([[
- /* Convert token to internal form. */
- if (looka_ <= 0)
- {
- looka_ = eof_;
- ilooka_ = 0;
- YYCDEBUG << "Now at end of input." << std::endl;
- }
- else
- {
- ilooka_ = translate_ (looka_);
+ /* Return YYSTR after stripping away unnecessary quotes and
+ backslashes, so that it's suitable for yyerror. The heuristic is
+ that double-quoting is unnecessary unless the string contains an
+ apostrophe, a comma, or backslash (other than backslash-backslash).
+ YYSTR is taken from yytname. */
+ std::string
+ ]b4_parser_class_name[::yytnamerr_ (const char *yystr)
+ {
+ if (*yystr == '"')
+ {
+ std::string yyr = "";
+ char const *yyp = yystr;
+
+ for (;;)
+ switch (*++yyp)
+ {
+ case '\'':
+ case ',':
+ goto do_not_strip_quotes;
+
+ case '\\':
+ if (*++yyp != '\\')
+ goto do_not_strip_quotes;
+ /* Fall through. */
+ default:
+ yyr += *yyp;
+ break;
+
+ case '"':
+ return yyr;
+ }
+ do_not_strip_quotes: ;
+ }
+
+ return yystr;
+ }
+]])[
+
+ /// Build a parser object.
+ ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
+ :])[
#if YYDEBUG
- if (debug_)
- {
- YYCDEBUG << "Next token is " << looka_
- << " (" << name_[[ilooka_]];
- print_ ();
- YYCDEBUG << ')' << std::endl;
- }
-#endif
- }
+ ]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false),
+ yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
+#endif]b4_parse_param_cons[
+ {
+ }
- n_ += ilooka_;
- if (n_ < 0 || last_ < n_ || check_[[n_]] != ilooka_)
- goto yydefault;
+ ]b4_parser_class_name::~b4_parser_class_name[ ()
+ {
+ }
- /* Reduce or error. */
- n_ = table_[[n_]];
- if (n_ < 0)
- {
- if (n_ == table_ninf_)
- goto yyerrlab;
- else
- {
- n_ = -n_;
- goto yyreduce;
- }
- }
- else if (n_ == 0)
- goto yyerrlab;
-
- /* Accept? */
- if (n_ == final_)
- goto yyacceptlab;
-
- /* Shift the lookahead token. */
- YYCDEBUG << "Shifting token " << looka_
- << " (" << name_[[ilooka_]] << "), ";
-
- /* 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;
-
- /* Default action. */
- yydefault:
- n_ = defact_[[state_]];
- if (n_ == 0)
- goto yyerrlab;
- goto yyreduce;
-
- /* Reduce. */
- yyreduce:
- len_ = r2_[[n_]];
- if (len_)
- {
- yyval = semantic_stack_[[len_ - 1]];
- yyloc = location_stack_[[len_ - 1]];
- }
- else
- {
- yyval = semantic_stack_[[0]];
- yyloc = location_stack_[[0]];
- }
-#if YYDEBUG
- if (debug_)
- {
- YYCDEBUG << "Reducing via rule " << n_ - 1
- << " (line " << rline_[[n_]] << "), ";
- for (b4_int_type_for([b4_prhs]) i = prhs_[[n_]];
- 0 <= rhs_[[i]]; ++i)
- YYCDEBUG << name_[[rhs_[i]]] << ' ';
- YYCDEBUG << "-> " << name_[[r1_[n_]]] << std::endl;
- }
-#endif
+ /*---------------.
+ | Symbol types. |
+ `---------------*/
- if (len_)
- {
- Slice< LocationType, LocationStack > slice (location_stack_, len_);
- YYLLOC_DEFAULT (yyloc, slice, len_);
- }
+ // symbol_base_type.
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type ()
+ : value()]b4_locations_if([
+ , location()])[
+ {
+ }]b4_locations_if([[
- switch (n_)
- {
- b4_actions
- }
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (const location_type& l)
+ : value()
+ , location(l)
+ {
+ }]])[
+
+ template <typename Exact>
+ ]b4_parser_class_name[::symbol_base_type<Exact>::symbol_base_type (]b4_args(
+ [const semantic_type& v],
+ b4_locations_if([const location_type& l]))[)
+ : value(v)]b4_locations_if([
+ , location(l)])[
+ {
+ }
-/* Line __line__ of __file__. */
-b4_syncline([@oline@], [@ofile@])
+ template <typename Exact>
+ const Exact&
+ ]b4_parser_class_name[::symbol_base_type<Exact>::self () const
+ {
+ return static_cast<const Exact&>(*this);
+ }
- state_stack_.pop (len_);
- semantic_stack_.pop (len_);
- location_stack_.pop (len_);
+ template <typename Exact>
+ Exact&
+ ]b4_parser_class_name[::symbol_base_type<Exact>::self ()
+ {
+ return static_cast<Exact&>(*this);
+ }
-#if YYDEBUG
- if (debug_)
- {
- YYCDEBUG << "state stack now";
- for (StateStack::ConstIterator i = state_stack_.begin ();
- i != state_stack_.end (); ++i)
- YYCDEBUG << ' ' << *i;
- YYCDEBUG << std::endl;
- }
-#endif
+ template <typename Exact>
+ int
+ ]b4_parser_class_name[::symbol_base_type<Exact>::type_get () const
+ {
+ return self ().type_get_ ();
+ }
- 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;
-
- /* Report and recover from errors. This is very incomplete. */
- yyerrlab:
- /* 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 = "parse 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
-#endif
- message = "parse error";
- error_ ();
- }
- goto yyerrlab1;
+ // symbol_type.
+ ]b4_parser_class_name[::symbol_type::symbol_type ()
+ : super_type ()
+ , type ()
+ {
+ }
- /* Error raised explicitly by an action. */
- yyerrlab1:
- if (errstatus == 3)
- {
- /* If just tried and failed to reuse lookahead token after an
- error, discard it. */
-
- /* Return failure if at end of input. */
- if (looka_ == eof_)
- goto yyabortlab;
- YYCDEBUG << "Discarding token " << looka_
- << " (" << name_[[ilooka_]] << ")." << std::endl;
- looka_ = empty_;
- }
+ ]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)
+ {
+ }
- /* Else will try to reuse lookahead token after shifting the error
- token. */
+ int
+ ]b4_parser_class_name[::symbol_type::type_get_ () const
+ {
+ return type;
+ }
- errstatus = 3;
+]b4_symbol_constructor_definitions[
- for (;;)
- {
- n_ = pact_[[state_]];
- if (n_ != pact_ninf_)
- {
- n_ += terror_;
- if (0 <= n_ && n_ <= last_ && check_[[n_]] == terror_)
- {
- n_ = table_[[n_]];
- if (0 < n_)
- break;
- }
- }
-
- /* Pop the current state because it cannot handle the error token. */
- if (!state_stack_.height ())
- goto yyabortlab;
+ // stack_symbol_type.
+ ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
+ : super_type ()
+ , state ()
+ {
+ }
+
+ ]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (]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)
+ {
+ }
-#if YYDEBUG
- if (debug_)
- {
- if (stos_[[state_]] < ntokens_)
- {
- YYCDEBUG << "Error: popping token "
- << token_number_[[stos_[state_]]]
- << " (" << name_[[stos_[state_]]];
-# ifdef YYPRINT
- YYPRINT (stderr, token_number_[[stos_[state_]]],
- semantic_stack_.top ());
-# endif
- YYCDEBUG << ')' << std::endl;
- }
- else
- {
- YYCDEBUG << "Error: popping nonterminal ("
- << name_[[stos_[state_]]] << ')' << std::endl;
- }
- }
-#endif
+ int
+ ]b4_parser_class_name[::stack_symbol_type::type_get_ () const
+ {
+ return yystos_[state];
+ }
- state_ = (state_stack_.pop (), state_stack_[[0]]);
- semantic_stack_.pop ();
- location_stack_.pop ();;
+
+ 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)
+ {
+]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
- if (debug_)
- {
- YYCDEBUG << "Error: state stack now";
- for (StateStack::ConstIterator i = state_stack_.begin ();
- i != state_stack_.end (); ++i)
- YYCDEBUG << ' ' << *i;
- YYCDEBUG << std::endl;
- }
+ 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)
+ {
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))[
+ default:
+ break;
+ }
+ yyo << ')';
+ }
#endif
- }
-
- if (n_ == final_)
- goto yyacceptlab;
- YYCDEBUG << "Shifting error token, ";
+ 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)
+ {
+ yystack_.pop (n);
+ }
- semantic_stack_.push (value);
- location_stack_.push (location);
+#if YYDEBUG
+ std::ostream&
+ ]b4_parser_class_name[::debug_stream () const
+ {
+ return *yycdebug_;
+ }
- state_ = n_;
- goto yynewstate;
+ void
+ ]b4_parser_class_name[::set_debug_stream (std::ostream& o)
+ {
+ yycdebug_ = &o;
+ }
- /* Accept. */
- yyacceptlab:
- return 0;
- /* Abort. */
- yyabortlab:
- return 1;
-}
+ ]b4_parser_class_name[::debug_level_type
+ ]b4_parser_class_name[::debug_level () const
+ {
+ return yydebug_;
+ }
-void
-yy::b4_parser_class_name::lex_ ()
-{
-#if YYLSP_NEEDED
- looka_ = yylex (&value, &location);
-#else
- looka_ = yylex (&value);
+ void
+ ]b4_parser_class_name[::set_debug_level (debug_level_type l)
+ {
+ yydebug_ = l;
+ }
#endif
-}
-
-/* YYPACT[[STATE-NUM]] -- Index in YYTABLE of the portion describing
- STATE-NUM. */
-const b4_int_type_for([b4_pact]) 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_for([b4_table]) 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
-};
+
+ int
+ ]b4_parser_class_name[::parse ()
+ {
+ /// Whether yyla contains a lookahead.
+ bool yyempty = true;
+
+ /* State. */
+ int yyn;
+ int yylen = 0;
+ int yystate = 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[2];]])[
+
+ /// $$ 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 state was pushed on the stack.
+ // Invariant: yystate == yystack_[0].state, i.e.,
+ // yystate was just pushed onto the state stack.
+ yynewstate:
+ YYCDEBUG << "Entering state " << yystate << std::endl;
+
+ /* Accept? */
+ if (yystate == yyfinal_)
+ goto yyacceptlab;
+
+ goto yybackup;
+
+ /* Backup. */
+ yybackup:
+
+ /* Try to take a decision without lookahead. */
+ yyn = yypact_[yystate];
+ if (yyn == yypact_ninf_)
+ goto yydefault;
+
+ /* Read a lookahead token. */
+ if (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 (yyn == 0 || yyn == yytable_ninf_)
+ 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. */
+ yystate = yyn;
+ yypush_ ("Shifting", yystate, yyla);
+ goto yynewstate;
+
+ /*-----------------------------------------------------------.
+ | yydefault -- do the default action for the current state. |
+ `-----------------------------------------------------------*/
+ yydefault:
+ yyn = yydefact_[yystate];
+ if (yyn == 0)
+ goto yyerrlab;
+ goto yyreduce;
+
+ /*-----------------------------.
+ | yyreduce -- Do a reduction. |
+ `-----------------------------*/
+ yyreduce:
+ yylen = yyr2_[yyn];]b4_variant_if([
+ /* Variants are always initialized to an empty instance of the
+ correct type. The default $$=$1 rule is NOT applied when using
+ variants */
+ ]b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])[],[
+ /* If YYLEN is nonzero, implement the default value of the action:
+ `$$ = $1'. Otherwise, use the top of the stack.
+
+ Otherwise, the following line sets YYLHS.VALUE to garbage.
+ This behavior is undocumented and Bison
+ users should not rely upon it. */
+ if (yylen)
+ yylhs.value = yystack_@{yylen - 1@}.value;
+ else
+ yylhs.value = yystack_@{0@}.value;])[
+]b4_locations_if([dnl
+[
+ // Compute the default @@$.
+ {
+ slice<stack_symbol_type, stack_type> slice (yystack_, yylen);
+ YYLLOC_DEFAULT (yylhs.location, slice, yylen);
+ }]])[
+
+ // Perform the reduction.
+ YY_REDUCE_PRINT (yyn);
+ switch (yyn)
+ {
+]b4_user_actions[
+ default:
+ break;
+ }
+ // Compute post-reduction state.
+ yyn = yyr1_[yyn];
+ yystate = yypgoto_[yyn - yyntokens_] + yystack_[yylen].state;
+ if (0 <= yystate && yystate <= yylast_
+ && yycheck_[yystate] == yystack_[yylen].state)
+ yystate = yytable_[yystate];
+ else
+ yystate = yydefgoto_[yyn - yyntokens_];
+ yylhs.state = yystate;
+ YY_SYMBOL_PRINT ("-> $$ =", yylhs);
+]b4_variant_if([[
+ // Destroy the lhs symbols.
+ for (int i = 0; i < yylen; ++i)
+ // Destroy a variant which value may have be swapped with
+ // yylhs.value. The value of yylhs.value (hence maybe one of
+ // these lhs symbols) depends on what does the default
+ // contruction for this type. In the case of pointers for
+ // instance, nothing is done, so the value is junk. Therefore
+ // do not try to report the content in the debug trace, it's
+ // junk. Hence yymsg = 0. Besides, that keeps exactly the same
+ // traces as with the other Bison skeletons.
+ yy_destroy_ (0, yystack_[i]);]])[
+
+ yypop_ (yylen);
+ yylen = 0;
+ YY_STACK_PRINT ();
+
+ /* Shift the result of the reduction. */
+ yypush_ (0, yylhs);
+ goto yynewstate;
+
+ /*------------------------------------.
+ | yyerrlab -- here on detecting error |
+ `------------------------------------*/
+ yyerrlab:
+ /* If not already recovering from an error, report this error. */
+ if (!yyerrstatus_)
+ {
+ ++yynerrs_;
+ error (]b4_args(b4_locations_if([yyla.location]),
+ [yysyntax_error_ (yystate, yyla.type)])[);
+ }
+
+]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. */
+
+ /* Return failure if at end of input. */
+ if (yyla.type == yyeof_)
+ YYABORT;
+ else
+ {
+ 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[0].location = yystack_[yylen - 1].location;]])[
+ /* Do not reclaim the symbols of the rule which action triggered
+ this YYERROR. */
+ yypop_ (yylen);
+ yylen = 0;
+ yystate = yystack_[0].state;
+ goto yyerrlab1;
+
+ /*-------------------------------------------------------------.
+ | yyerrlab1 -- common code for both syntax error and YYERROR. |
+ `-------------------------------------------------------------*/
+ yyerrlab1:
+ yyerrstatus_ = 3; /* Each real token shifted decrements this. */
+ {
+ 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;
+ }
+ }
+
+ // 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. */
+ 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;
+ }
+
+ // Generate an error message.
+ std::string
+ ]b4_parser_class_name[::yysyntax_error_ (]dnl
+b4_error_verbose_if([int yystate, int yytoken],
+ [int, int])[)
+ {
+ std::string yyres;]b4_error_verbose_if([[
+ int yyn = yypact_[yystate];
+ if (yypact_ninf_ < yyn && yyn <= yylast_)
+ {
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. */
+ int yyxbegin = yyn < 0 ? -yyn : 0;
+
+ /* Stay within bounds of both yycheck and yytname. */
+ int yychecklim = yylast_ - yyn + 1;
+ int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+
+ // Number of "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
+ ]])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[;
+ ]b4_table_define([pact], [b4_pact])[;
+
+ /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE
+ doesn't specify something else to do. Zero means the default is an
+ error. */
+ ]b4_table_define([defact], [b4_defact])[;
+
+ /* YYPGOTO[NTERM-NUM]. */
+ ]b4_table_define([pgoto], [b4_pgoto])[;
+
+ /* YYDEFGOTO[NTERM-NUM]. */
+ ]b4_table_define([defgoto], [b4_defgoto])[;
+
+ /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If
+ positive, shift that token. If negative, reduce the rule which
+ number is the opposite. If zero, do what YYDEFACT says. */
+ const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
+ ]b4_table_define([table], [b4_table])[;
+
+ /* YYCHECK. */
+ ]b4_table_define([check], [b4_check])[;
+
+ /* STOS_[STATE-NUM] -- The (internal number of the) accessing
+ symbol of state STATE-NUM. */
+ ]b4_table_define([stos], [b4_stos])[;
#if YYDEBUG
-/* 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
-};
-
-/* TOKEN_NUMBER_[[YYLEX-NUM]] -- Internal token number corresponding
- to YYLEX-NUM. */
-const b4_int_type_for([b4_toknum])
-yy::b4_parser_class_name::token_number_[[]] =
-{
- b4_toknum
-};
+ /* TOKEN_NUMBER_[YYLEX-NUM] -- Internal symbol number corresponding
+ to YYLEX-NUM. */
+ ]b4_table_define([token_number], [b4_toknum])[;
#endif
-/* YYR1[[YYN]] -- Symbol number of symbol that rule YYN derives. */
-const b4_int_type_for([b4_r1])
-yy::b4_parser_class_name::r1_[[]] =
-{
- b4_r1
-};
-
-/* YYR2[[YYN]] -- Number of symbols composing right hand side of rule YYN. */
-const b4_int_type_for([b4_r2])
-yy::b4_parser_class_name::r2_[[]] =
-{
- b4_r2
-};
-
-#if YYDEBUG || YYERROR_VERBOSE
-/* YYTNAME[[SYMBOL-NUM]] -- String name of the symbol SYMBOL-NUM.
- First, the terminals, then, starting at YYNTOKENS, nonterminals. */
-const char*
-const yy::b4_parser_class_name::name_[[]] =
-{
- b4_tname
-};
+ /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */
+ ]b4_table_define([r1], [b4_r1])[;
+
+ /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */
+ ]b4_table_define([r2], [b4_r2])[;
+
+#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE
+ /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+ First, the terminals, then, starting at \a yyntokens_, nonterminals. */
+ const char*
+ const ]b4_parser_class_name[::yytname_[] =
+ {
+ ]b4_tname[
+ };
#endif
#if YYDEBUG
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-const yy::b4_parser_class_name::RhsNumberType
-yy::b4_parser_class_name::rhs_[[]] =
-{
- b4_rhs
-};
-
-/* YYPRHS[[YYN]] -- Index of the first RHS symbol of rule number YYN in
- YYRHS. */
-const b4_int_type_for([b4_prhs])
-yy::b4_parser_class_name::prhs_[[]] =
-{
- b4_prhs
-};
-
-/* YYRLINE[[YYN]] -- source line where rule number YYN was defined. */
-const b4_int_type_for([b4_rline])
-yy::b4_parser_class_name::rline_[[]] =
-{
- b4_rline
-};
-#endif
+ /* YYRLINE[YYN] -- Source line where rule number YYN was defined. */
+ ]b4_table_define([rline], [b4_rline])[;
-/* 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_[[]] =
+ // Print the state stack on the debug stream.
+ void
+ ]b4_parser_class_name[::yystack_print_ ()
{
- b4_translate
- };
- if ((unsigned) token <= user_token_number_max_)
- return translate_[[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 int yy::b4_parser_class_name::initdepth_ = b4_stack_depth_init;
-
-const unsigned 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([2002])
+ *yycdebug_ << "Stack now";
+ for (stack_type::const_iterator
+ i = yystack_.begin (),
+ i_end = yystack_.end ();
+ i != i_end; ++i)
+ *yycdebug_ << ' ' << i->state;
+ *yycdebug_ << std::endl;
+ }
+
+ // Report on the debug stream that the rule \a yyrule is going to be reduced.
+ void
+ ]b4_parser_class_name[::yy_reduce_print_ (int yyrule)
+ {
+ unsigned int yylno = yyrline_[yyrule];
+ int yynrhs = yyr2_[yyrule];
+ /* Print the symbols being reduced, and their result. */
+ *yycdebug_ << "Reducing stack by rule " << yyrule - 1
+ << " (line " << yylno << "):" << std::endl;
+ /* The symbols being reduced. */
+ for (int yyi = 0; yyi < yynrhs; yyi++)
+ YY_SYMBOL_PRINT (" $" << yyi + 1 << " =",
+ ]b4_rhs_data(yynrhs, yyi + 1)[);
+ }
+#endif // YYDEBUG
+
+]b4_yytranslate_definition[
+]b4_namespace_close[
+
+]b4_epilogue[]dnl
+@output(b4_dir_prefix[]stack.hh@)@
+b4_copyright([Stack handling for Bison parsers in C++])[
#ifndef BISON_STACK_HH
# define BISON_STACK_HH
#include <deque>
-namespace yy
-{
- template < class T, class S = std::deque< T > >
- class Stack
+]b4_namespace_open[
+ template <class T, class S = std::deque<T> >
+ class stack
{
public:
- typedef typename S::iterator Iterator;
- typedef typename S::const_iterator ConstIterator;
+ // Hide our reversed order.
+ typedef typename S::reverse_iterator iterator;
+ typedef typename S::const_reverse_iterator const_iterator;
- Stack () : seq_ ()
+ stack () : seq_ ()
{
}
- Stack (unsigned n) : seq_ (n)
+ stack (unsigned int n) : seq_ (n)
{
}
inline
T&
- operator [[]] (unsigned index)
+ operator [] (unsigned int i)
{
- return seq_[[index]];
+ return seq_[i];
}
inline
const T&
- operator [[]] (unsigned index) const
+ operator [] (unsigned int i) const
{
- return seq_[[index]];
+ return seq_[i];
}
inline
inline
void
- pop (unsigned n = 1)
+ pop (unsigned int n = 1)
{
for (; n; --n)
seq_.pop_front ();
}
inline
- unsigned
- height () const
+ typename S::size_type
+ size () const
{
return seq_.size ();
}
- inline ConstIterator begin () const { return seq_.begin (); }
- inline ConstIterator end () const { return seq_.end (); }
+ inline const_iterator begin () const { return seq_.rbegin (); }
+ inline const_iterator end () const { return seq_.rend (); }
private:
-
+ /// The wrapped container.
S seq_;
};
- template < class T, class S = Stack< T > >
- class Slice
+ /// Present a slice of the top of a stack.
+ template <class T, class S = stack<T> >
+ class slice
{
public:
- Slice (const S& stack,
- unsigned range) : stack_ (stack),
- range_ (range)
+ slice (const S& stack,
+ unsigned int range) : stack_ (stack),
+ range_ (range)
{
}
inline
const T&
- operator [[]] (unsigned index) const
+ operator [] (unsigned int i) const
{
- return stack_[[range_ - index]];
+ return stack_[range_ - i];
}
private:
const S& stack_;
- unsigned range_;
- };
-}
-
-#endif // not BISON_STACK_HH
-dnl
-@output location.hh
-b4_copyright([2002])
-
-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
-
-namespace yy
-{
- struct Position
- {
- int line;
- int column;
- };
-
- struct Location
- {
- Position first;
- Position last;
+ unsigned int range_;
};
-}
+]b4_namespace_close[
-#endif // not BISON_LOCATION_HH
+#endif // not BISON_STACK_HH[]dnl
+]
+m4_divert_pop(0)
+m4_popdef([b4_copyright_years])dnl
projects / bison.git / blobdiff