# 02110-1301 USA
m4_include(b4_pkgdatadir/[c++.m4])
+m4_include(b4_pkgdatadir/[location.cc])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
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])[
-/* FIXME: This is wrong, we want computed header guards.
- I don't know why the macros are missing now. :( */
+ [2002, 2003, 2004, 2005])
+dnl FIXME: This is wrong, we want computed header guards.
+dnl FIXME: I don\'t know why the macros are missing now. :(
+[
#ifndef PARSER_HEADER_H
# define PARSER_HEADER_H
#include <string>
#include <iostream>
-
-/* Using locations. */
-#define YYLSP_NEEDED ]b4_locations_flag[
+#include "stack.hh"
namespace yy
{
class location;
}
-]b4_token_enums(b4_tokens)[
-
-/* Copy the first part of user declarations. */
+/* First part of user declarations. */
]b4_pre_prologue[
]/* Line __line__ of lalr1.cc. */
b4_syncline([@oline@], [@ofile@])[
-#include "stack.hh"
-#include "location.hh"
+]dnl Include location.hh here: it might depend on headers included above.
+[#include "location.hh"
/* Enabling traces. */
#ifndef YYDEBUG
# define YYERROR_VERBOSE ]b4_error_verbose[
#endif
-#if YYERROR_VERBOSE
-# define YYERROR_VERBOSE_IF(x) x
-#else
-# define YYERROR_VERBOSE_IF(x) /* empty */
-#endif
-
/* Enabling the token table. */
#ifndef YYTOKEN_TABLE
# define YYTOKEN_TABLE ]b4_token_table[
#endif
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-]m4_ifdef([b4_stype],
-[b4_syncline([b4_stype_line], [b4_file_name])
-union YYSTYPE b4_stype;
-/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])],
-[typedef int YYSTYPE;])[
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
-
-/* Copy the second part of user declarations. */
-]b4_post_prologue[
-
-]/* Line __line__ of lalr1.cc. */
-b4_syncline([@oline@], [@ofile@])[
/* 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). */
/// A Bison parser.
class ]b4_parser_class_name[
{
+ public:
/// 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;])[
+#else
typedef YYSTYPE semantic_type;
+#endif
/// Symbol locations.
typedef ]b4_location_type[ location_type;
+ /// Tokens.
+ struct token
+ {
+ ]b4_token_enums(b4_tokens)[
+ };
- public:
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[) :
yydebug_ (false),
virtual void error (const location_type& loc, const std::string& msg);
/// Generate an error message.
- /// \param tok the look-ahead token.
- virtual std::string yysyntax_error_ (YYERROR_VERBOSE_IF (int tok));
+ /// \param state the state where the error occurred.
+ /// \param tok the look-ahead token.
+ virtual std::string yysyntax_error_ (int yystate]dnl
+b4_error_verbose_if([, int tok])[);
#if YYDEBUG
/// \brief Report a symbol on the debug stream.
static const unsigned int yyuser_token_number_max_;
static const token_number_type yyundef_token_;
- /* State. */
- int yyn_;
- int yylen_;
- int yystate_;
-
- /* Error handling. */
- int yynerrs_;
- int yyerrstatus_;
-
/* Debugging. */
int yydebug_;
std::ostream* yycdebug_;
};
}
+]m4_ifset([b4_global_tokens_and_yystype],
+[b4_token_defines(b4_tokens)
+
+#ifndef YYSTYPE
+ /* Redirection for backward compatibility. */
+# define YYSTYPE yy::b4_parser_class_name::semantic_type
+#endif
+])[
#endif /* ! defined PARSER_HEADER_H */]
])dnl
@output @output_parser_name@
[
#include @output_header_name@])[
+/* User implementation prologue. */
+]b4_post_prologue[
+
+]/* Line __line__ of lalr1.cc. */
+b4_syncline([@oline@], [@ofile@])[
+
#ifndef YY_
# if YYENABLE_NLS
# if ENABLE_NLS
yy::]b4_parser_class_name[::parse ()
{
/// Look-ahead and look-ahead in internal form.
- int yychar;
- int yytoken;
+ int yychar = yyempty_;
+ int yytoken = 0;
+
+ /* State. */
+ int yyn;
+ int yylen;
+ int yystate = 0;
+
+ /* Error handling. */
+ int yynerrs_ = 0;
+ int yyerrstatus_ = 0;
/// Semantic value of the look-ahead.
semantic_type yylval;
/// @@$.
location_type yyloc;
- int yyresult_;
+ int yyresult;
YYCDEBUG << "Starting parse" << std::endl;
- yynerrs_ = 0;
- yyerrstatus_ = 0;
-
- /* Start. */
- yystate_ = 0;
- yychar = yyempty_;
-
]m4_ifdef([b4_initial_action], [
m4_pushdef([b4_at_dollar], [yylloc])dnl
m4_pushdef([b4_dollar_dollar], [yylval])dnl
/* New state. */
yynewstate:
- yystate_stack_.push (yystate_);
- YYCDEBUG << "Entering state " << yystate_ << std::endl;
+ yystate_stack_.push (yystate);
+ YYCDEBUG << "Entering state " << yystate << std::endl;
goto yybackup;
/* Backup. */
yybackup:
/* Try to take a decision without look-ahead. */
- yyn_ = yypact_[yystate_];
- if (yyn_ == yypact_ninf_)
+ yyn = yypact_[yystate];
+ if (yyn == yypact_ninf_)
goto yydefault;
/* Read a look-ahead token. */
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
- /* If the proper action on seeing token ILOOKA_ is to reduce or to
+ /* If the proper action on seeing token YYTOKEN is to reduce or to
detect an error, take that action. */
- yyn_ += yytoken;
- if (yyn_ < 0 || yylast_ < yyn_ || yycheck_[yyn_] != yytoken)
+ yyn += yytoken;
+ if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
goto yydefault;
/* Reduce or error. */
- yyn_ = yytable_[yyn_];
- if (yyn_ < 0)
+ yyn = yytable_[yyn];
+ if (yyn <= 0)
{
- if (yyn_ == yytable_ninf_)
+ if (yyn == 0 || yyn == yytable_ninf_)
goto yyerrlab;
- else
- {
- yyn_ = -yyn_;
- goto yyreduce;
- }
+ yyn = -yyn;
+ goto yyreduce;
}
- else if (yyn_ == 0)
- goto yyerrlab;
/* Accept? */
- if (yyn_ == yyfinal_)
+ if (yyn == yyfinal_)
goto yyacceptlab;
/* Shift the look-ahead token. */
if (yyerrstatus_)
--yyerrstatus_;
- yystate_ = yyn_;
+ yystate = yyn;
goto yynewstate;
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
yydefault:
- yyn_ = yydefact_[yystate_];
- if (yyn_ == 0)
+ yyn = yydefact_[yystate];
+ if (yyn == 0)
goto yyerrlab;
goto yyreduce;
| yyreduce -- Do a reduction. |
`-----------------------------*/
yyreduce:
- yylen_ = yyr2_[yyn_];
+ yylen = yyr2_[yyn];
/* If LEN_ is nonzero, implement the default value of the action:
`$$ = $1'. Otherwise, use the top of the stack.
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
users should not rely upon it. */
- if (yylen_)
- yyval = yysemantic_stack_[yylen_ - 1];
+ if (yylen)
+ yyval = yysemantic_stack_[yylen - 1];
else
yyval = yysemantic_stack_[0];
{
- slice<location_type, location_stack_type> slice (yylocation_stack_, yylen_);
- YYLLOC_DEFAULT (yyloc, slice, yylen_);
+ slice<location_type, location_stack_type> slice (yylocation_stack_, yylen);
+ YYLLOC_DEFAULT (yyloc, slice, yylen);
}
- YY_REDUCE_PRINT (yyn_);
- switch (yyn_)
+ YY_REDUCE_PRINT (yyn);
+ switch (yyn)
{
]b4_actions[
default: break;
]/* Line __line__ of lalr1.cc. */
b4_syncline([@oline@], [@ofile@])[
- yypop_ (yylen_);
+ yypop_ (yylen);
YY_STACK_PRINT ();
yylocation_stack_.push (yyloc);
/* Shift the result of the reduction. */
- yyn_ = yyr1_[yyn_];
- yystate_ = yypgoto_[yyn_ - yyntokens_] + yystate_stack_[0];
- if (0 <= yystate_ && yystate_ <= yylast_
- && yycheck_[yystate_] == yystate_stack_[0])
- yystate_ = yytable_[yystate_];
+ yyn = yyr1_[yyn];
+ yystate = yypgoto_[yyn - yyntokens_] + yystate_stack_[0];
+ if (0 <= yystate && yystate <= yylast_
+ && yycheck_[yystate] == yystate_stack_[0])
+ yystate = yytable_[yystate];
else
- yystate_ = yydefgoto_[yyn_ - yyntokens_];
+ yystate = yydefgoto_[yyn - yyntokens_];
goto yynewstate;
/*------------------------------------.
if (!yyerrstatus_)
{
++yynerrs_;
- error (yylloc, yysyntax_error_ (YYERROR_VERBOSE_IF (yytoken)));
+ error (yylloc, yysyntax_error_ (yystate]dnl
+b4_error_verbose_if([, yytoken])[));
}
yyerror_range[0] = yylloc;
if (false)
goto yyerrorlab;
- yyerror_range[0] = yylocation_stack_[yylen_ - 1];
- yypop_ (yylen_);
- yystate_ = yystate_stack_[0];
+ yyerror_range[0] = yylocation_stack_[yylen - 1];
+ yypop_ (yylen);
+ yystate = yystate_stack_[0];
goto yyerrlab1;
/*-------------------------------------------------------------.
for (;;)
{
- yyn_ = yypact_[yystate_];
- if (yyn_ != yypact_ninf_)
+ yyn = yypact_[yystate];
+ if (yyn != yypact_ninf_)
{
- yyn_ += yyterror_;
- if (0 <= yyn_ && yyn_ <= yylast_ && yycheck_[yyn_] == yyterror_)
+ yyn += yyterror_;
+ if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
{
- yyn_ = yytable_[yyn_];
- if (0 < yyn_)
+ yyn = yytable_[yyn];
+ if (0 < yyn)
break;
}
}
yyerror_range[0] = yylocation_stack_[0];
yydestruct_ ("Error: popping",
- yystos_[yystate_],
+ yystos_[yystate],
&yysemantic_stack_[0], &yylocation_stack_[0]);
yypop_ ();
- yystate_ = yystate_stack_[0];
+ yystate = yystate_stack_[0];
YY_STACK_PRINT ();
}
- if (yyn_ == yyfinal_)
+ if (yyn == yyfinal_)
goto yyacceptlab;
yyerror_range[1] = yylloc;
yylocation_stack_.push (yyloc);
/* Shift the error token. */
- YY_SYMBOL_PRINT ("Shifting", yystos_[yyn_],
+ YY_SYMBOL_PRINT ("Shifting", yystos_[yyn],
&yysemantic_stack_[0], &yylocation_stack_[0]);
- yystate_ = yyn_;
+ yystate = yyn;
goto yynewstate;
/* Accept. */
yyacceptlab:
- yyresult_ = 0;
+ yyresult = 0;
goto yyreturn;
/* Abort. */
yyabortlab:
- yyresult_ = 1;
+ yyresult = 1;
goto yyreturn;
yyreturn:
yypop_ ();
}
- return yyresult_;
+ return yyresult;
}
// Generate an error message.
std::string
-yy::]b4_parser_class_name[::yysyntax_error_ (YYERROR_VERBOSE_IF (int tok))
+yy::]b4_parser_class_name[::yysyntax_error_ (int yystate]dnl
+b4_error_verbose_if([, int tok])[)
{
std::string res;
#if YYERROR_VERBOSE
- yyn_ = yypact_[yystate_];
- if (yypact_ninf_ < yyn_ && yyn_ < yylast_)
+ 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;
+ int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
- int yychecklim = yylast_ - yyn_;
+ 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_)
+ if (yycheck_[x + yyn] == x && x != yyterror_)
++count;
// FIXME: This method of building the message is not compatible
{
count = 0;
for (int x = yyxbegin; x < yyxend; ++x)
- if (yycheck_[x + yyn_] == x && x != yyterror_)
+ if (yycheck_[x + yyn] == x && x != yyterror_)
{
res += (!count++) ? ", expecting " : " or ";
res += yytnamerr_ (yytname_[x]);
{
unsigned int yylno = yyrline_[yyrule];
/* Print the symbols being reduced, and their result. */
- *yycdebug_ << "Reducing stack by rule " << yyn_ - 1
+ *yycdebug_ << "Reducing stack by rule " << yyrule - 1
<< " (line " << yylno << "), ";
- for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyn_];
+ for (]b4_int_type_for([b4_prhs])[ i = yyprhs_[yyrule];
0 <= yyrhs_[i]; ++i)
*yycdebug_ << yytname_[yyrhs_[i]] << ' ';
- *yycdebug_ << "-> " << yytname_[yyr1_[yyn_]] << std::endl;
+ *yycdebug_ << "-> " << yytname_[yyr1_[yyrule]] << std::endl;
}
#endif // YYDEBUG
]b4_epilogue
dnl
-@output stack.hh
+@output b4_dir_prefix[]stack.hh
b4_copyright([stack handling for Bison C++ parsers], [2002, 2003, 2004, 2005])[
#ifndef BISON_STACK_HH
}
#endif // not BISON_STACK_HH]
-dnl
-@output position.hh
-b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
-
-/**
- ** \file position.hh
- ** Define the position class.
- */
-
-#ifndef BISON_POSITION_HH
-# define BISON_POSITION_HH
-
-# include <iostream>
-# include <string>
-
-namespace yy
-{
- /// Abstract a position.
- class position
- {
- public:
- /// Initial column number.
- static const unsigned int initial_column = 0;
- /// Initial line number.
- static const unsigned int initial_line = 1;
-
- /** \name Ctor & dtor.
- ** \{ */
- public:
- /// Construct a position.
- position () :
- filename (0),
- line (initial_line),
- column (initial_column)
- {
- }
- /** \} */
-
-
- /** \name Line and Column related manipulators
- ** \{ */
- public:
- /// (line related) Advance to the COUNT next lines.
- inline void lines (int count = 1)
- {
- column = initial_column;
- line += count;
- }
-
- /// (column related) Advance to the COUNT next columns.
- inline void columns (int count = 1)
- {
- int leftmost = initial_column;
- int current = column;
- if (leftmost <= current + count)
- column += count;
- else
- column = initial_column;
- }
- /** \} */
-
- public:
- /// File name to which this position refers.
- ]b4_filename_type[* filename;
- /// Current line number.
- unsigned int line;
- /// Current column number.
- unsigned int column;
- };
-
- /// Add and assign a position.
- inline const position&
- operator+= (position& res, const int width)
- {
- res.columns (width);
- return res;
- }
-
- /// Add two position objects.
- inline const position
- operator+ (const position& begin, const int width)
- {
- position res = begin;
- return res += width;
- }
-
- /// Add and assign a position.
- inline const position&
- operator-= (position& res, const int width)
- {
- return res += -width;
- }
-
- /// Add two position objects.
- inline const position
- operator- (const position& begin, const int width)
- {
- return begin + -width;
- }
-
- /** \brief Intercept output stream redirection.
- ** \param ostr the destination output stream
- ** \param pos a reference to the position to redirect
- */
- inline std::ostream&
- operator<< (std::ostream& ostr, const position& pos)
- {
- if (pos.filename)
- ostr << *pos.filename << ':';
- return ostr << pos.line << '.' << pos.column;
- }
-
-}
-#endif // not BISON_POSITION_HH]
-@output location.hh
-b4_copyright([Location class for Bison C++ parsers], [2002, 2003, 2004, 2005])[
-
-/**
- ** \file location.hh
- ** Define the location class.
- */
-
-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
-
-# include <iostream>
-# include <string>
-# include "position.hh"
-
-namespace yy
-{
-
- /// Abstract a location.
- class location
- {
- /** \name Ctor & dtor.
- ** \{ */
- public:
- /// Construct a location.
- location () :
- begin (),
- end ()
- {
- }
- /** \} */
-
-
- /** \name Line and Column related manipulators
- ** \{ */
- public:
- /// Reset initial location to final location.
- inline void step ()
- {
- begin = end;
- }
-
- /// Extend the current location to the COUNT next columns.
- inline void columns (unsigned int count = 1)
- {
- end += count;
- }
-
- /// Extend the current location to the COUNT next lines.
- inline void lines (unsigned int count = 1)
- {
- end.lines (count);
- }
- /** \} */
-
-
- public:
- /// Beginning of the located region.
- position begin;
- /// End of the located region.
- position end;
- };
-
- /// Join two location objects to create a location.
- inline const location operator+ (const location& begin, const location& end)
- {
- location res = begin;
- res.end = end.end;
- return res;
- }
-
- /// Add two location objects.
- inline const location operator+ (const location& begin, unsigned int width)
- {
- location res = begin;
- res.columns (width);
- return res;
- }
-
- /// Add and assign a location.
- inline location& operator+= (location& res, unsigned int width)
- {
- res.columns (width);
- return res;
- }
-
- /** \brief Intercept output stream redirection.
- ** \param ostr the destination output stream
- ** \param loc a reference to the location to redirect
- **
- ** Avoid duplicate information.
- */
- inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
- {
- position last = loc.end - 1;
- ostr << loc.begin;
- if (last.filename
- && (!loc.begin.filename
- || *loc.begin.filename != *last.filename))
- ostr << '-' << last;
- else if (loc.begin.line != last.line)
- ostr << '-' << last.line << '.' << last.column;
- else if (loc.begin.column != last.column)
- ostr << '-' << last.column;
- return ostr;
- }
-
-}
-
-#endif // not BISON_LOCATION_HH]
+m4_divert(-1)
projects / bison.git / blobdiff