-dnl
-@output position.hh
-b4_copyright([Position class for Bison C++ parsers], [2002, 2003, 2004])[
-
-/**
- ** \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 (),
- 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.
- std::string 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.empty ())
- 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])[
-
-/**
- ** \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 (void) :
- begin (),
- end ()
- {
- }
- /** \} */
-
-
- /** \name Line and Column related manipulators
- ** \{ */
- public:
- /// Reset initial location to final location.
- inline void step (void)
- {
- 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 (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