-m4_divert(-1)
-
# C++ skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+# Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
+# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
-
+#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
-
+#
# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301 USA
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
m4_include(b4_pkgdatadir/[c++.m4])
+
+# How the semantic value is extracted when using variants.
+b4_variant_if([
+ # b4_symbol_value(VAL, [TYPE])
+ # ----------------------------
+ m4_define([b4_symbol_value],
+ [m4_ifval([$2],
+ [$1.as<$2>()],
+ [$1])])
+]) # b4_variant_if
+
+
+# b4_symbol_actions(FILENAME, LINENO,
+# SYMBOL-TAG, SYMBOL-NUM,
+# SYMBOL-ACTION, SYMBOL-TYPENAME)
+# -------------------------------------------------
+# Same as in C, but using references instead of pointers.
+m4_define([b4_symbol_actions],
+[m4_pushdef([b4_dollar_dollar],
+ [b4_symbol_value([yyvalue], [$6])])dnl
+m4_pushdef([b4_at_dollar], [yylocation])dnl
+ case $4: // $3
+b4_syncline([$2], [$1])
+ $5;
+b4_syncline([@oline@], [@ofile@])
+ break;
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# b4_symbol_action_(SYMBOL-TAG, SYMBOL-NUM, SYMBOL-TYPENAME)
+# ----------------------------------------------------------
+# Invoke b4_dollar_dollar(SYMBOL_TYPENAME) for each symbol.
+m4_define([b4_symbol_action_],
+[m4_ifval($3,
+[ case $2: // $1
+ b4_dollar_dollar($@);
+ break;
+])])
+
+
+# b4_symbol_variant(YYTYPE, YYVAL, ACTION)
+# ----------------------------------------
+# 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>()])dnl
+ switch ($1)
+ {
+m4_map([b4_symbol_action_], m4_defn([b4_type_names]))
+ default:
+ break;
+ }
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# _b4_char_sizeof_counter
+# -----------------------
+# A counter used by _b4_char_sizeof_dummy to create fresh symbols.
+m4_define([_b4_char_sizeof_counter],
+[0])
+
+# _b4_char_sizeof_dummy
+# ---------------------
+# At each call return a new C++ identifier.
+m4_define([_b4_char_sizeof_dummy],
+[m4_define([_b4_char_sizeof_counter], m4_incr(_b4_char_sizeof_counter))dnl
+dummy[]_b4_char_sizeof_counter])
+
+
+# b4_char_sizeof(SYMBOL-TAG, SYMBOL-NUM, SYMBOL-TYPENAME)
+# -------------------------------------------------------
+# To be mapped on the list of type names to produce:
+#
+# char dummy1[sizeof(type_name_1)];
+# char dummy2[sizeof(type_name_2)];
+#
+# for defined type names.
+# $3 is doubly-quoted, do not quote it again.
+m4_define([b4_char_sizeof],
+[m4_ifval($3,
+[
+ char _b4_char_sizeof_dummy@{sizeof($3)@}; // $1])dnl
+])
+
+
+m4_define([b4_parser_class_name],
+ [b4_percent_define_get([[parser_class_name]])])
+
+# The header is mandatory.
+b4_defines_if([],
+ [b4_fatal([b4_skeleton[: using %%defines is mandatory]])])
+
+# Backward compatibility.
+m4_define([b4_location_constructors])
m4_include(b4_pkgdatadir/[location.cc])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
-m4_divert(0)dnl
-m4_if(b4_defines_flag, 0, [],
-[@output @output_header_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002, 2003, 2004, 2005])
+m4_divert_push(0)dnl
+b4_defines_if(
+[@output(b4_spec_defines_file@)
+b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008])
dnl FIXME: This is wrong, we want computed header guards.
[
+/* C++ LALR(1) parser skeleton written by Akim Demaille. */
+
#ifndef PARSER_HEADER_H
# define PARSER_HEADER_H
+]b4_percent_code_get([[requires]])[
+
#include <string>
#include <iostream>
#include "stack.hh"
-namespace yy
-{
+]b4_namespace_open[
class position;
class location;
-}
+]b4_variant_if([[
+ /// A char[S] buffer to store and retrieve objects.
+ ///
+ /// Sort of a variant, but does not keep track of the nature
+ /// of the stored data, since that knowledge is available
+ /// via the current state.
+ template <size_t S>
+ struct variant
+ {
+ /// Instantiate a \a T in here.
+ template <typename T>
+ inline void
+ build()
+ {
+ new (buffer) T;
+ }
-/* First part of user declarations. */
-]b4_pre_prologue[
+ /// Destroy the stored \a T.
+ template <typename T>
+ inline void
+ destroy()
+ {
+ reinterpret_cast<T&>(buffer).~T();
+ }
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
+ /// Accessor to a built \a T.
+ template <typename T>
+ inline T&
+ as()
+ {
+ return reinterpret_cast<T&>(buffer);
+ }
-]dnl Include location.hh here: it might depend on headers included above.
-[#include "location.hh"
+ /// Const accessor to a built \a T (for %printer).
+ template <typename T>
+ inline const T&
+ as() const
+ {
+ return reinterpret_cast<const T&>(buffer);
+ }
+
+ /// A buffer large enough to store any of the semantic values.
+ char buffer[S];
+ };
+]])[
+]b4_namespace_close[
+
+#include "location.hh"
/* Enabling traces. */
#ifndef YYDEBUG
-# define YYDEBUG ]b4_debug[
+# define YYDEBUG ]b4_debug_flag[
#endif
/* Enabling verbose error messages. */
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
-# define YYERROR_VERBOSE ]b4_error_verbose[
+# define YYERROR_VERBOSE ]b4_error_verbose_flag[
#endif
/* Enabling the token table. */
} while (false)
#endif
-namespace yy
-{
+]b4_namespace_open[
/// A Bison parser.
class ]b4_parser_class_name[
{
public:
+#ifndef YYSTYPE
+]b4_variant_if(
+[ /// An auxiliary type to compute the largest semantic type.
+ union union_type
+ {]m4_map([b4_char_sizeof], m4_defn([b4_type_names]))[
+ };
+
/// Symbol semantic values.
-#if ! defined (YYSTYPE)
-]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
- union semantic_type b4_stype;
-/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])],
-[ typedef int semantic_type;])[
+ 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
typedef YYSTYPE semantic_type;
#endif
/// Symbol locations.
- typedef ]b4_location_type[ location_type;
+ typedef ]b4_percent_define_get([[location_type]])[ location_type;
/// Tokens.
struct token
{
]b4_token_enums(b4_tokens)[
};
+ /// Token type.
+ typedef token::yytokentype token_type;
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[);
/// \returns 0 iff parsing succeeded.
virtual int parse ();
+#if YYDEBUG
/// The current debugging stream.
std::ostream& debug_stream () const;
/// Set the current debugging stream.
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.
/// Generate an error message.
/// \param state the state where the error occurred.
- /// \param tok the look-ahead token.
+ /// \param tok the lookahead token.
virtual std::string yysyntax_error_ (int yystate]dnl
b4_error_verbose_if([, int tok])[);
#if YYDEBUG
+ /// \brief Report a symbol value on the debug stream.
+ /// \param yytype The token type.
+ /// \param yyvalue Its semantic value.
+ /// \param yylocation Its location.
+ virtual void yy_symbol_value_print_ (int yytype,
+ const semantic_type& yyvalue,
+ const location_type& yylocation);
/// \brief Report a symbol on the debug stream.
/// \param yytype The token type.
- /// \param yyvaluep Its semantic value.
- /// \param yylocationp Its location.
- virtual void yysymprint_ (int yytype,
- const semantic_type* yyvaluep,
- const location_type* yylocationp);
-#endif /* ! YYDEBUG */
+ /// \param yyvalue Its semantic value.
+ /// \param yylocation Its location.
+ virtual void yy_symbol_print_ (int yytype,
+ const semantic_type& yyvalue,
+ const location_type& yylocation);
+#endif
/// State numbers.
/// For each scanner token number, its symbol number.
static const ]b4_int_type_for([b4_toknum])[ yytoken_number_[];
/// Report on the debug stream that the rule \a r is going to be reduced.
- virtual void yyreduce_print_ (int r);
+ virtual void yy_reduce_print_ (int r);
/// Print the state stack on the debug stream.
virtual void yystack_print_ ();
+
+ /* Debugging. */
+ int yydebug_;
+ std::ostream* yycdebug_;
#endif
- /// Convert a scanner token number to a symbol number.
- inline token_number_type yytranslate_ (int token);
+ /// Convert a scanner token number \a t to a symbol number.
+ token_number_type yytranslate_ (int t);
/// \brief Reclaim the memory associated to a symbol.
/// \param yymsg Why this token is reclaimed.
/// \param yytype The symbol type.
- /// \param yyvaluep Its semantic value.
- /// \param yylocationp Its location.
+ /// \param yyvalue Its semantic value.
+ /// \param yylocation Its location.
inline void yydestruct_ (const char* yymsg,
- int yytype,
- semantic_type* yyvaluep,
- location_type* yylocationp);
+ int yytype,
+ semantic_type& yyvalue,
+ location_type& yylocation);
+
+ /// Push a new state on the stack.
+ /// \warning the contents of \a v is stolen.
+ inline void yypush_ (state_type s,
+ semantic_type& v, const location_type& l);
/// Pop \a n symbols the three stacks.
inline void yypop_ (unsigned int n = 1);
static const int yyntokens_;
static const unsigned int yyuser_token_number_max_;
static const token_number_type yyundef_token_;
-
- /* Debugging. */
- int yydebug_;
- std::ostream* yycdebug_;
-
]b4_parse_param_vars[
};
-}
+]b4_namespace_close[
-]m4_ifset([b4_global_tokens_and_yystype],
+]b4_percent_define_flag_if([[global_tokens_and_yystype]],
[b4_token_defines(b4_tokens)
#ifndef YYSTYPE
- /* Redirection for backward compatibility. */
-# define YYSTYPE yy::b4_parser_class_name::semantic_type
+ /* Redirection for backward compatibility. */
+# define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type
#endif
-])[
-#endif /* ! defined PARSER_HEADER_H */]
+])
+b4_percent_code_get([[provides]])[]dnl
+
+[#endif /* ! defined PARSER_HEADER_H */]
])dnl
-@output @output_parser_name@
-b4_copyright([C++ Skeleton parser for LALR(1) parsing with Bison],
- [2002, 2003, 2004, 2005])
-m4_if(b4_prefix[], [yy], [],
+@output(b4_parser_file_name@)
+b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+b4_percent_code_get([[top]])[]dnl
+m4_if(b4_prefix, [yy], [],
[
// Take the name prefix into account.
-#define yylex b4_prefix[]lex])
-m4_if(b4_defines_flag, 0, [],
-[
-#include @output_header_name@])[
+#define yylex b4_prefix[]lex])[
-/* User implementation prologue. */
-]b4_post_prologue[
+/* First part of user declarations. */
+]b4_user_pre_prologue
+
+b4_defines_if([[
+#include "@basename(]b4_spec_defines_file[@)"]])[
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
+/* User implementation prologue. */
+]b4_user_post_prologue
+b4_percent_code_get[]dnl
-#ifndef YY_
+[#ifndef YY_
# if YYENABLE_NLS
# if ENABLE_NLS
# include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
#endif
/* Suppress unused-variable warnings by "using" E. */
-#define YYUSE(e) do {;} while (false && (e))
-
-/* A pseudo ostream that takes yydebug_ into account. */
-# define YYCDEBUG \
- for (bool yydebugcond_ = yydebug_; yydebugcond_; yydebugcond_ = false) \
- (*yycdebug_)
+#define YYUSE(e) ((void) (e))
/* Enable debugging if requested. */
#if YYDEBUG
+/* A pseudo ostream that takes yydebug_ into account. */
+# define YYCDEBUG if (yydebug_) (*yycdebug_)
+
# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
do { \
if (yydebug_) \
{ \
- *yycdebug_ << (Title) << ' '; \
- yysymprint_ ((Type), (Value), (Location)); \
+ *yycdebug_ << Title << ' '; \
+ yy_symbol_print_ ((Type), (Value), (Location)); \
*yycdebug_ << std::endl; \
} \
} while (false)
# define YY_REDUCE_PRINT(Rule) \
do { \
if (yydebug_) \
- yyreduce_print_ (Rule); \
+ yy_reduce_print_ (Rule); \
} while (false)
# define YY_STACK_PRINT() \
#else /* !YYDEBUG */
+# define YYCDEBUG if (false) std::cerr
# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
# define YY_REDUCE_PRINT(Rule)
# define YY_STACK_PRINT()
#endif /* !YYDEBUG */
+#define yyerrok (yyerrstatus_ = 0)
+#define yyclearin (yychar = yyempty_)
+
#define YYACCEPT goto yyacceptlab
#define YYABORT goto yyabortlab
#define YYERROR goto yyerrorlab
+#define YYRECOVERING() (!!yyerrstatus_)
+]b4_namespace_open[
#if YYERROR_VERBOSE
-/* Return YYSTR after stripping away unnecessary quotes and
- backslashes, so that it's suitable for yyerror. The heuristic is
- that double-quoting is unnecessary unless the string contains an
- apostrophe, a comma, or backslash (other than backslash-backslash).
- YYSTR is taken from yytname. */
-std::string
-yy::]b4_parser_class_name[::yytnamerr_ (const char *yystr)
-{
- if (*yystr == '"')
- {
- std::string yyr = "";
- char const *yyp = yystr;
-
- for (;;)
- switch (*++yyp)
- {
- case '\'':
- case ',':
- goto do_not_strip_quotes;
-
- case '\\':
- if (*++yyp != '\\')
- goto do_not_strip_quotes;
- /* Fall through. */
- default:
- yyr += *yyp;
- break;
-
- case '"':
- return yyr;
- }
- do_not_strip_quotes: ;
- }
+ /* Return YYSTR 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;
-}
+ return yystr;
+ }
#endif
-namespace yy
-{
/// Build a parser object.
- ]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)
- : yydebug_ (false),
- yycdebug_ (&std::cerr)]b4_parse_param_cons[
+ ]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[
{
}
| Print this symbol on YYOUTPUT. |
`--------------------------------*/
- void
- ]b4_parser_class_name[::yysymprint_ (int yytype,
- const semantic_type* yyvaluep, const location_type* yylocationp)
+ inline void
+ ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
+ const semantic_type& yyvalue, const location_type& yylocation)
{
- /* Backward compatibility, but should be removed eventually. */
- std::ostream& cdebug_ = *yycdebug_;
-
- YYUSE (!&cdebug_);
- YYUSE (yylocationp);
- YYUSE (yyvaluep);
-
- *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
- << ' ' << yytname_[yytype] << " ("
- << *yylocationp << ": ";
+ YYUSE (yylocation);
+ YYUSE (yyvalue);
switch (yytype)
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
[ default:
- break;
+ break;
}
+ }
+
+
+ void
+ ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
+ const semantic_type& yyvalue, const location_type& yylocation)
+ {
+ *yycdebug_ << (yytype < yyntokens_ ? "token" : "nterm")
+ << ' ' << yytname_[yytype] << " ("
+ << yylocation << ": ";
+ yy_symbol_value_print_ (yytype, yyvalue, yylocation);
*yycdebug_ << ')';
}
-#endif /* ! YYDEBUG */
+#endif
void
]b4_parser_class_name[::yydestruct_ (const char* yymsg,
- int yytype, semantic_type* yyvaluep, location_type* yylocationp)
+ int yytype, semantic_type& yyvalue, location_type& yylocation)
{
- YYUSE (yylocationp);
YYUSE (yymsg);
- YYUSE (yyvaluep);
+ YYUSE (yyvalue);
+ YYUSE (yylocation);
- YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
+ YY_SYMBOL_PRINT (yymsg, yytype, yyvalue, yylocation);
switch (yytype)
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
- default:
- break;
+ default:
+ break;
}
}
+ void
+ ]b4_parser_class_name[::yypush_ (state_type s,
+ semantic_type& v, const location_type& l)
+ {
+ yystate_stack_.push (s);
+ yysemantic_stack_.push (v);
+ yylocation_stack_.push (l);
+ }
+
void
]b4_parser_class_name[::yypop_ (unsigned int n)
{
yylocation_stack_.pop (n);
}
+#if YYDEBUG
std::ostream&
]b4_parser_class_name[::debug_stream () const
{
{
yydebug_ = l;
}
-
+#endif
int
]b4_parser_class_name[::parse ()
{
- /// Look-ahead and look-ahead in internal form.
+ /// Lookahead and lookahead in internal form.
int yychar = yyempty_;
int yytoken = 0;
/* State. */
int yyn;
- int yylen;
+ int yylen = 0;
int yystate = 0;
- /* Error handling. */
+ /* Error handling. */
int yynerrs_ = 0;
int yyerrstatus_ = 0;
- /// Semantic value of the look-ahead.
+ /// Semantic value of the lookahead.
semantic_type yylval;
- /// Location of the look-ahead.
+ /// Location of the lookahead.
location_type yylloc;
/// The locations where the error started and ended.
- location yyerror_range[2];
+ location_type yyerror_range[2];
/// $$.
semantic_type yyval;
]m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar], [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
- /* User initialization code. */
- b4_initial_action
+ /* User initialization code. */
+ b4_user_initial_action
m4_popdef([b4_dollar_dollar])dnl
-m4_popdef([b4_at_dollar])dnl
- /* Line __line__ of yacc.c. */
-b4_syncline([@oline@], [@ofile@])])dnl
+m4_popdef([b4_at_dollar])])dnl
[ /* Initialize the stacks. The initial state will be pushed in
yynewstate, since the latter expects the semantical and the
yystate_stack_ = state_stack_type (0);
yysemantic_stack_ = semantic_stack_type (0);
yylocation_stack_ = location_stack_type (0);
- yysemantic_stack_.push (yylval);
- yylocation_stack_.push (yylloc);
+ yypush_ (yystate, yylval, yylloc);
- /* New state. */
+ // A new state was pushed on the stack.
+ // Invariant: yystate == yystack_[0].state, i.e.,
+ // yystate was just pushed onto the state stack.
yynewstate:
- yystate_stack_.push (yystate);
YYCDEBUG << "Entering state " << yystate << std::endl;
+
+ /* Accept? */
+ if (yystate == yyfinal_)
+ goto yyacceptlab;
+
goto yybackup;
/* Backup. */
yybackup:
- /* Try to take a decision without look-ahead. */
+ /* Try to take a decision without lookahead. */
yyn = yypact_[yystate];
if (yyn == yypact_ninf_)
goto yydefault;
- /* Read a look-ahead token. */
+ /* Read a lookahead token. */
if (yychar == yyempty_)
{
- YYCDEBUG << "Reading a token: ";
- yychar = ]b4_c_function_call([yylex], [int],
- [[YYSTYPE*], [&yylval]][]dnl
-b4_location_if([, [[location*], [&yylloc]]])dnl
+ YYCDEBUG << "Reading a token: ";
+ yychar = ]b4_c_function_call([yylex], [int],
+ [[YYSTYPE*], [&yylval]][]dnl
+b4_locations_if([, [[location*], [&yylloc]]])dnl
m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
}
/* Convert token to internal form. */
if (yychar <= yyeof_)
{
- yychar = yytoken = yyeof_;
- YYCDEBUG << "Now at end of input." << std::endl;
+ yychar = yytoken = yyeof_;
+ YYCDEBUG << "Now at end of input." << std::endl;
}
else
{
- yytoken = yytranslate_ (yychar);
- YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+ yytoken = yytranslate_ (yychar);
+ YY_SYMBOL_PRINT ("Next token is", yytoken, yylval, yylloc);
}
/* If the proper action on seeing token YYTOKEN is to reduce or to
yyn = yytable_[yyn];
if (yyn <= 0)
{
- if (yyn == 0 || yyn == yytable_ninf_)
- goto yyerrlab;
- yyn = -yyn;
- goto yyreduce;
+ if (yyn == 0 || yyn == yytable_ninf_)
+ goto yyerrlab;
+ yyn = -yyn;
+ goto yyreduce;
}
- /* Accept? */
- if (yyn == yyfinal_)
- goto yyacceptlab;
-
- /* Shift the look-ahead token. */
- YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+ /* Shift the lookahead token. */
+ YY_SYMBOL_PRINT ("Shifting", yytoken, yylval, yylloc);
- /* Discard the token being shifted unless it is eof. */
- if (yychar != yyeof_)
- yychar = yyempty_;
-
- yysemantic_stack_.push (yylval);
- yylocation_stack_.push (yylloc);
+ /* Discard the token being shifted. */
+ yychar = yyempty_;
/* Count tokens shifted since error; after three, turn off error
status. */
--yyerrstatus_;
yystate = yyn;
+ yypush_ (yystate, yylval, yylloc);
goto yynewstate;
/*-----------------------------------------------------------.
| yyreduce -- Do a reduction. |
`-----------------------------*/
yyreduce:
- yylen = yyr2_[yyn];
- /* If LEN_ is nonzero, implement the default value of the action:
+ yylen = yyr2_[yyn];]b4_variant_if([
+ /* Variants are always initialized to an empty instance of the
+ correct type. The default $$=$1 rule is NOT applied when using
+ variants */
+ ]b4_symbol_variant([[yyr1_@{yyn@}]], [yyval], [build])[],[
+ /* If YYLEN is nonzero, implement the default value of the action:
`$$ = $1'. Otherwise, use the top of the stack.
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
users should not rely upon it. */
if (yylen)
- yyval = yysemantic_stack_[yylen - 1];
+ yyval = yysemantic_stack_@{yylen - 1@};
else
- yyval = yysemantic_stack_[0];
+ yyval = yysemantic_stack_@{0@};])[
{
slice<location_type, location_stack_type> slice (yylocation_stack_, yylen);
YY_REDUCE_PRINT (yyn);
switch (yyn)
{
- ]b4_actions[
- default: break;
+ ]b4_user_actions[
+ default:
+ break;
}
-
- ]/* Line __line__ of lalr1.cc. */
- b4_syncline([@oline@], [@ofile@])[
+ YY_SYMBOL_PRINT ("-> $$ =", yyr1_[yyn], yyval, yyloc);
yypop_ (yylen);
-
+ yylen = 0;
YY_STACK_PRINT ();
- yysemantic_stack_.push (yyval);
- yylocation_stack_.push (yyloc);
-
/* Shift the result of the reduction. */
yyn = yyr1_[yyn];
yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0];
if (0 <= yystate && yystate <= yylast_
- && yycheck_[yystate] == yystate_stack_[0])
+ && yycheck_[yystate] == yystate_stack_[0])
yystate = yytable_[yystate];
else
yystate = yydefgoto_[yyn - yyntokens_];
+ yypush_ (yystate, yyval, yyloc);
goto yynewstate;
/*------------------------------------.
/* If not already recovering from an error, report this error. */
if (!yyerrstatus_)
{
- ++yynerrs_;
- error (yylloc, yysyntax_error_ (yystate]dnl
+ ++yynerrs_;
+ error (yylloc, yysyntax_error_ (yystate]dnl
b4_error_verbose_if([, yytoken])[));
}
yyerror_range[0] = yylloc;
if (yyerrstatus_ == 3)
{
- /* If just tried and failed to reuse look-ahead token after an
- error, discard it. */
-
- if (yychar <= yyeof_)
- {
- /* Return failure if at end of input. */
- if (yychar == yyeof_)
- YYABORT;
- }
- else
- {
- yydestruct_ ("Error: discarding", yytoken, &yylval, &yylloc);
- yychar = yyempty_;
- }
+ /* If just tried and failed to reuse lookahead token after an
+ error, discard it. */
+
+ if (yychar <= yyeof_)
+ {
+ /* Return failure if at end of input. */
+ if (yychar == yyeof_)
+ YYABORT;
+ }
+ else
+ {
+ yydestruct_ ("Error: discarding", yytoken, yylval, yylloc);
+ yychar = yyempty_;
+ }
}
- /* Else will try to reuse look-ahead token after shifting the error
+ /* Else will try to reuse lookahead token after shifting the error
token. */
goto yyerrlab1;
goto yyerrorlab;
yyerror_range[0] = yylocation_stack_[yylen - 1];
+ /* Do not reclaim the symbols of the rule which action triggered
+ this YYERROR. */
yypop_ (yylen);
+ yylen = 0;
yystate = yystate_stack_[0];
goto yyerrlab1;
for (;;)
{
- yyn = yypact_[yystate];
- if (yyn != yypact_ninf_)
- {
- yyn += yyterror_;
- if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
- {
- yyn = yytable_[yyn];
- if (0 < yyn)
- break;
- }
- }
-
- /* Pop the current state because it cannot handle the error token. */
- if (yystate_stack_.height () == 1)
- YYABORT;
-
- yyerror_range[0] = yylocation_stack_[0];
- yydestruct_ ("Error: popping",
- yystos_[yystate],
- &yysemantic_stack_[0], &yylocation_stack_[0]);
- yypop_ ();
- yystate = yystate_stack_[0];
- YY_STACK_PRINT ();
+ yyn = yypact_[yystate];
+ if (yyn != yypact_ninf_)
+ {
+ yyn += yyterror_;
+ if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
+ {
+ yyn = yytable_[yyn];
+ if (0 < yyn)
+ break;
+ }
+ }
+
+ /* Pop the current state because it cannot handle the error token. */
+ if (yystate_stack_.size () == 1)
+ YYABORT;
+
+ yyerror_range[0] = yylocation_stack_[0];
+ yydestruct_ ("Error: popping",
+ yystos_[yystate],
+ yysemantic_stack_[0], yylocation_stack_[0]);
+ yypop_ ();
+ yystate = yystate_stack_[0];
+ YY_STACK_PRINT ();
}
- if (yyn == yyfinal_)
- goto yyacceptlab;
-
yyerror_range[1] = yylloc;
// Using YYLLOC is tempting, but would change the location of
- // the look-ahead. YYLOC is available though.
- YYLLOC_DEFAULT (yyloc, yyerror_range - 1, 2);
- yysemantic_stack_.push (yylval);
- yylocation_stack_.push (yyloc);
+ // the lookahead. YYLOC is available though.
+ YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
- /* Shift the error token. */
+ /* Shift the error token. */
YY_SYMBOL_PRINT ("Shifting", yystos_[yyn],
- &yysemantic_stack_[0], &yylocation_stack_[0]);
+ yysemantic_stack_[0], yylocation_stack_[0]);
yystate = yyn;
+ yypush_ (yystate, yylval, yyloc);
goto yynewstate;
/* Accept. */
goto yyreturn;
yyreturn:
- if (yychar != yyeof_ && yychar != yyempty_)
- yydestruct_ ("Cleanup: discarding lookahead", yytoken, &yylval, &yylloc);
+ if (yychar != yyempty_)
+ yydestruct_ ("Cleanup: discarding lookahead", yytoken, yylval, yylloc);
- while (yystate_stack_.height () != 1)
+ /* Do not reclaim the symbols of the rule which action triggered
+ this YYABORT or YYACCEPT. */
+ yypop_ (yylen);
+ while (yystate_stack_.size () != 1)
{
- yydestruct_ ("Cleanup: popping",
- yystos_[yystate_stack_[0]],
- &yysemantic_stack_[0],
- &yylocation_stack_[0]);
- yypop_ ();
+ yydestruct_ ("Cleanup: popping",
+ yystos_[yystate_stack_[0]],
+ yysemantic_stack_[0],
+ yylocation_stack_[0]);
+ yypop_ ();
}
return yyresult;
b4_error_verbose_if([, int tok])[)
{
std::string res;
+ YYUSE (yystate);
#if YYERROR_VERBOSE
int yyn = yypact_[yystate];
- if (yypact_ninf_ < yyn && yyn < yylast_)
+ 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;
- int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
- int count = 0;
- for (int x = yyxbegin; x < yyxend; ++x)
- if (yycheck_[x + yyn] == x && x != yyterror_)
- ++count;
-
- // FIXME: This method of building the message is not compatible
- // with internationalization. It should work like yacc.c does it.
- // That is, first build a string that looks like this:
- // "syntax error, unexpected %s or %s or %s"
- // Then, invoke YY_ on this string.
- // Finally, use the string as a format to output
- // yytname_[tok], etc.
- // Until this gets fixed, this message appears in English only.
- res = "syntax error, unexpected ";
- res += yytnamerr_ (yytname_[tok]);
- if (count < 5)
- {
- count = 0;
- for (int x = yyxbegin; x < yyxend; ++x)
- if (yycheck_[x + yyn] == x && x != yyterror_)
- {
- res += (!count++) ? ", expecting " : " or ";
- res += yytnamerr_ (yytname_[x]);
- }
- }
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. */
+ int yyxbegin = yyn < 0 ? -yyn : 0;
+
+ /* Stay within bounds of both yycheck and yytname. */
+ int yychecklim = yylast_ - yyn + 1;
+ int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
+ int count = 0;
+ for (int x = yyxbegin; x < yyxend; ++x)
+ if (yycheck_[x + yyn] == x && x != yyterror_)
+ ++count;
+
+ // FIXME: This method of building the message is not compatible
+ // with internationalization. It should work like yacc.c does it.
+ // That is, first build a string that looks like this:
+ // "syntax error, unexpected %s or %s or %s"
+ // Then, invoke YY_ on this string.
+ // Finally, use the string as a format to output
+ // yytname_[tok], etc.
+ // Until this gets fixed, this message appears in English only.
+ res = "syntax error, unexpected ";
+ res += yytnamerr_ (yytname_[tok]);
+ if (count < 5)
+ {
+ count = 0;
+ for (int x = yyxbegin; x < yyxend; ++x)
+ if (yycheck_[x + yyn] == x && x != yyterror_)
+ {
+ res += (!count++) ? ", expecting " : " or ";
+ res += yytnamerr_ (yytname_[x]);
+ }
+ }
}
else
#endif
#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. */
+ First, the terminals, then, starting at \a yyntokens_, nonterminals. */
const char*
const ]b4_parser_class_name[::yytname_[] =
{
#endif
#if YYDEBUG
- /* YYRHS -- A `-1'-separated list of the rules' RHS. */
+ /* YYRHS -- A `-1'-separated list of the rules' RHS. */
const ]b4_parser_class_name[::rhs_number_type
]b4_parser_class_name[::yyrhs_[] =
{
{
*yycdebug_ << "Stack now";
for (state_stack_type::const_iterator i = yystate_stack_.begin ();
- i != yystate_stack_.end (); ++i)
+ i != yystate_stack_.end (); ++i)
*yycdebug_ << ' ' << *i;
*yycdebug_ << std::endl;
}
// Report on the debug stream that the rule \a yyrule is going to be reduced.
void
- ]b4_parser_class_name[::yyreduce_print_ (int yyrule)
+ ]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 << "), ";
- for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyrule];
- 0 <= yyrhs_[i]; ++i)
- *yycdebug_ << yytname_[yyrhs_[i]] << ' ';
- *yycdebug_ << "-> " << yytname_[yyr1_[yyrule]] << std::endl;
+ << " (line " << yylno << "):" << std::endl;
+ /* The symbols being reduced. */
+ for (int yyi = 0; yyi < yynrhs; yyi++)
+ YY_SYMBOL_PRINT (" $" << yyi + 1 << " =",
+ yyrhs_[yyprhs_[yyrule] + yyi],
+ ]b4_rhs_value(yynrhs, yyi + 1)[,
+ ]b4_rhs_location(yynrhs, yyi + 1)[);
}
#endif // YYDEBUG
/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
]b4_parser_class_name[::token_number_type
- ]b4_parser_class_name[::yytranslate_ (int token)
+ ]b4_parser_class_name[::yytranslate_ (int t)
{
static
const token_number_type
{
]b4_translate[
};
- if ((unsigned int) token <= yyuser_token_number_max_)
- return translate_table[token];
+ if ((unsigned int) t <= yyuser_token_number_max_)
+ return translate_table[t];
else
return yyundef_token_;
}
const unsigned int ]b4_parser_class_name[::yyuser_token_number_max_ = ]b4_user_token_number_max[;
const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;
-} // namespace yy
+]b4_namespace_close[
]b4_epilogue
dnl
-@output b4_dir_prefix[]stack.hh
-b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[
+@output(b4_dir_prefix[]stack.hh@)
+b4_copyright([Stack handling for Bison parsers in C++],
+ [2002, 2003, 2004, 2005, 2006, 2007, 2008])[
#ifndef BISON_STACK_HH
# define BISON_STACK_HH
#include <deque>
-namespace yy
-{
+]b4_namespace_open[
template <class T, class S = std::deque<T> >
class stack
{
}
inline
- unsigned int
- height () const
+ typename S::size_type
+ size () const
{
return seq_.size ();
}
inline const_iterator begin () const { return seq_.rbegin (); }
- inline const_iterator end () const { return seq_.rend (); }
+ inline const_iterator end () const { return seq_.rend (); }
private:
-
+ /// The wrapped container.
S seq_;
};
const S& stack_;
unsigned int range_;
};
-}
+]b4_namespace_close[
-#endif // not BISON_STACK_HH]
-m4_divert(-1)
+#endif // not BISON_STACK_HH[]dnl
+]
+m4_divert_pop(0)
projects / bison.git / blobdiff