// 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 " << static_cast <unsigned> (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 ";
#endif // not BISON_STACK_HH]
dnl
-@output location.hh
-b4_copyright([Location class for Bison C++ parsers], [2002, 2003])[
+@output position.hh
+b4_copyright([Position class for Bison C++ parsers], [2002, 2003])[
-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
+/**
+ ** \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:
- Position ()
- : filename (), line (1), column (0)
- {}
+ /** \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;
- int line;
- int column;
+ /** \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 << ':';
- ostr << pos.line << '.' << pos.column;
- return ostr;
+ return ostr << pos.line << '.' << pos.column;
}
- inline Position
- operator- (const Position& pos, int col)
- {
- Position res (pos);
- res.column -= col;
- return res;
- }
+}
+#endif // not BISON_POSITION_HH]
+@output location.hh
+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
+{
+ /** \brief Abstract a Location. */
class Location
{
+ /** \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;
};
- /* Don't issue twice the line number when the location is on a single
- line. */
+ /** \brief Join two Location objects to create a Location. */
+ inline const Location operator+ (const Location& begin, const Location& end)
+ {
+ Location res = begin;
+ res.end = end.end;
+ return res;
+ }
- inline std::ostream&
- operator<< (std::ostream& ostr, const Location& pos)
+ /** \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)
{
- ostr << pos.begin;
- if (pos.begin.filename != pos.end.filename)
- ostr << '-' << pos.end - 1;
- else if (pos.begin.line != pos.end.line)
- ostr << '-' << pos.end.line << '.' << pos.end.column - 1;
- else if (pos.begin.column != pos.end.column - 1)
- ostr << '-' << pos.end.column - 1;
+ 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;
}
projects / bison.git / blobdiff