## Default values. ##
## ---------------- ##
-# Stack parameters.
-m4_define_default([b4_stack_depth_init], [200])
-
# Default Parser class name.
m4_define_default([b4_parser_class_name], [Parser])
b4_syncline([@oline@], [@ofile@])[
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
- Current.last = Rhs[N].last;
+ Current.end = Rhs[N].end;
#endif
namespace yy
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_;
# define YYCDEBUG if (0) cdebug_
#endif /* !YYDEBUG */
+#define YYACCEPT goto yyacceptlab
+#define YYABORT goto yyabortlab
+#define YYERROR goto yyerrlab1
+
+
int
yy::]b4_parser_class_name[::parse ()
{
#if YYDEBUG
if (debug_)
{
+ // Short files will use "unsigned char" for line numbers,
+ // in which case they will be output as character litterals
+ // by "<<".
+ unsigned yylno = rline_[n_];
YYCDEBUG << "Reducing via rule " << n_ - 1
- << " (line " << rline_[n_] << "), ";
+ << " (line " << yylno << "), ";
for (]b4_int_type_for([b4_prhs])[ i = prhs_[n_];
0 <= rhs_[i]; ++i)
YYCDEBUG << name_[rhs_[i]] << ' ';
message += name_[ilooka_];
{
int count = 0;
- for (int x = (n_ < 0 ? -n_ : 0); x < ntokens_ + nnts_; ++x)
+ /* Start YYX at -YYN if negative to avoid negative indexes in
+ YYCHECK. */
+ int xbegin = n_ < 0 ? -n_ : 0;
+ /* Stay within bounds of both yycheck and yytname. */
+ int checklim = last_ - n_;
+ int xend = checklim < ntokens_ ? checklim : ntokens_;
+ for (int x = xbegin; x < xend; ++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)
+ for (int x = xbegin; x < xend; ++x)
if (check_[x + n_] == x && x != terror_)
{
message += (!count++) ? ", expecting " : " or ";
}
goto yyerrlab1;
- /* Error raised explicitly by an action. */
+
+ /*----------------------------------------------------.
+ | yyerrlab1 -- error raised explicitly by an action. |
+ `----------------------------------------------------*/
yyerrlab1:
if (errstatus == 3)
{
/* Return failure if at end of input. */
if (looka_ == eof_)
goto yyabortlab;
+#if YYDEBUG
YYCDEBUG << "Discarding token " << looka_
- << " (" << name_[ilooka_] << ")." << std::endl;
+ << " (" << name_[ilooka_] << ")." << std::endl;
+#endif
looka_ = empty_;
}
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, 2003])[
+b4_copyright([Stack handling for Bison C++ parsers], [2002, 2003])[
#ifndef BISON_STACK_HH
# define BISON_STACK_HH
#endif // not BISON_STACK_HH]
dnl
+@output position.hh
+b4_copyright([Position class for Bison C++ parsers], [2002, 2003])[
+
+/**
+ ** \file position.hh
+ ** Define the Location class.
+ */
+
+#ifndef BISON_POSITION_HH
+# define BISON_POSITION_HH
+
+# include <iostream>
+# include <string>
+
+namespace yy
+{
+ /** \brief Abstract a Position. */
+ class Position
+ {
+ public:
+ /** \brief Initial column number. */
+ static const unsigned int initial_column = 0;
+ /** \brief Initial line number. */
+ static const unsigned int initial_line = 1;
+
+ /** \name Ctor & dtor.
+ ** \{ */
+ public:
+ /** \brief Construct a Position. */
+ Position () :
+ filename (),
+ line (initial_line),
+ column (initial_column)
+ {
+ }
+ /** \} */
+
+
+ /** \name Line and Column related manipulators
+ ** \{ */
+ public:
+ /** \brief (line related) Advance to the LINES next lines. */
+ inline void lines (int lines = 1)
+ {
+ column = initial_column;
+ line += lines;
+ }
+
+ /** \brief (column related) Advance to the COLUMNS next columns. */
+ inline void columns (int columns = 1)
+ {
+ int leftmost = initial_column;
+ int current = column;
+ if (leftmost <= current + columns)
+ column += columns;
+ else
+ column = initial_column;
+ }
+ /** \} */
+
+ public:
+ /** \brief File name to which this position refers. */
+ std::string filename;
+ /** \brief Current line number. */
+ unsigned int line;
+ /** \brief Current column number. */
+ unsigned int column;
+ };
+
+ /** \brief Add and assign a Position. */
+ inline const Position&
+ operator+= (Position& res, const int width)
+ {
+ res.columns (width);
+ return res;
+ }
+
+ /** \brief Add two Position objects. */
+ inline const Position
+ operator+ (const Position& begin, const int width)
+ {
+ Position res = begin;
+ return res += width;
+ }
+
+ /** \brief Add and assign a Position. */
+ inline const Position&
+ operator-= (Position& res, const int width)
+ {
+ return res += -width;
+ }
+
+ /** \brief 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([2002, 2003])[
+b4_copyright([Location class for Bison C++ parsers], [2002, 2003])[
+
+/**
+ ** \file location.hh
+ ** Define the Location class.
+ */
#ifndef BISON_LOCATION_HH
# define BISON_LOCATION_HH
+# include <iostream>
+# include <string>
+# include "position.hh"
+
namespace yy
{
- struct Position
+
+ /** \brief Abstract a Location. */
+ class Location
{
- int line;
- int column;
+ /** \name Ctor & dtor.
+ ** \{ */
+ public:
+ /** \brief Construct a Location. */
+ Location (void) :
+ begin (),
+ end ()
+ {
+ }
+ /** \} */
+
+
+ /** \name Line and Column related manipulators
+ ** \{ */
+ public:
+ /** \brief Reset initial location to final location. */
+ inline void step (void)
+ {
+ begin = end;
+ }
+
+ /** \brief Extend the current location to the COLUMNS next columns. */
+ inline void columns (unsigned columns = 1)
+ {
+ end += columns;
+ }
+
+ /** \brief Extend the current location to the LINES next lines. */
+ inline void lines (unsigned lines = 1)
+ {
+ end.lines (lines);
+ }
+ /** \} */
+
+
+ public:
+ /** \brief Beginning of the located region. */
+ Position begin;
+ /** \brief End of the located region. */
+ Position end;
};
- struct Location
+ /** \brief Join two Location objects to create a Location. */
+ inline const Location operator+ (const Location& begin, const Location& end)
{
- Position first;
- Position last;
- };
+ Location res = begin;
+ res.end = end.end;
+ return res;
+ }
+
+ /** \brief Add two Location objects */
+ inline const Location operator+ (const Location& begin, unsigned width)
+ {
+ Location res = begin;
+ res.columns (width);
+ return res;
+ }
+
+ /** \brief Add and assign a Location */
+ inline Location &operator+= (Location& res, unsigned 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 (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]
projects / bison.git / blobdiff