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98c4f1bbeb
This version is required by upstream ANGLE. win_bison conveniently uses a different executable name as the existing bison copy, avoiding conflicts. Change-Id: I2897ce97aef6795933d3ab8b5570a8494a55523e Reviewed-by: Lars Knoll <lars.knoll@digia.com>
336 lines
8.4 KiB
C++
336 lines
8.4 KiB
C++
# C++ skeleton for Bison
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# Copyright (C) 2002-2013 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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m4_pushdef([b4_copyright_years],
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[2002-2013])
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# b4_position_define
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# ------------------
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# Define class position.
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m4_define([b4_position_define],
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[[ /// Abstract a position.
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class position
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{
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public:]m4_ifdef([b4_location_constructors], [[
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/// Construct a position.
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explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
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unsigned int l = ]b4_location_initial_line[u,
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unsigned int c = ]b4_location_initial_column[u)
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: filename (f)
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, line (l)
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, column (c)
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{
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}
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]])[
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/// Initialization.
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void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULL,
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unsigned int l = ]b4_location_initial_line[u,
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unsigned int c = ]b4_location_initial_column[u)
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{
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filename = fn;
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line = l;
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column = c;
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}
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/** \name Line and Column related manipulators
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** \{ */
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/// (line related) Advance to the COUNT next lines.
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void lines (int count = 1)
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{
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if (count)
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{
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column = ]b4_location_initial_column[u;
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line = add_ (line, count, ]b4_location_initial_line[);
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}
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}
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/// (column related) Advance to the COUNT next columns.
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void columns (int count = 1)
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{
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column = add_ (column, count, ]b4_location_initial_column[);
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}
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/** \} */
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/// File name to which this position refers.
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]b4_percent_define_get([[filename_type]])[* filename;
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/// Current line number.
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unsigned int line;
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/// Current column number.
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unsigned int column;
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private:
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/// Compute max(min, lhs+rhs) (provided min <= lhs).
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static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min)
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{
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return (0 < rhs || -static_cast<unsigned int>(rhs) < lhs
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? rhs + lhs
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: min);
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}
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};
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/// Add and assign a position.
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inline position&
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operator+= (position& res, int width)
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{
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res.columns (width);
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return res;
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}
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/// Add two position objects.
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inline position
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operator+ (position res, int width)
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{
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return res += width;
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}
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/// Add and assign a position.
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inline position&
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operator-= (position& res, int width)
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{
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return res += -width;
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}
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/// Add two position objects.
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inline position
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operator- (position res, int width)
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{
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return res -= width;
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}
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]b4_percent_define_flag_if([[define_location_comparison]], [[
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/// Compare two position objects.
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inline bool
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operator== (const position& pos1, const position& pos2)
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{
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return (pos1.line == pos2.line
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&& pos1.column == pos2.column
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&& (pos1.filename == pos2.filename
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|| (pos1.filename && pos2.filename
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&& *pos1.filename == *pos2.filename)));
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}
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/// Compare two position objects.
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inline bool
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operator!= (const position& pos1, const position& pos2)
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{
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return !(pos1 == pos2);
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}
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]])[
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/** \brief Intercept output stream redirection.
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** \param ostr the destination output stream
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** \param pos a reference to the position to redirect
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*/
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template <typename YYChar>
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inline std::basic_ostream<YYChar>&
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operator<< (std::basic_ostream<YYChar>& ostr, const position& pos)
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{
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if (pos.filename)
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ostr << *pos.filename << ':';
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return ostr << pos.line << '.' << pos.column;
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}
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]])
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# b4_location_define
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# ------------------
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m4_define([b4_location_define],
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[[ /// Abstract a location.
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class location
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{
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public:
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]m4_ifdef([b4_location_constructors], [
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/// Construct a location from \a b to \a e.
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location (const position& b, const position& e)
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: begin (b)
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, end (e)
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{
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}
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/// Construct a 0-width location in \a p.
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explicit location (const position& p = position ())
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: begin (p)
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, end (p)
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{
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}
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/// Construct a 0-width location in \a f, \a l, \a c.
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explicit location (]b4_percent_define_get([[filename_type]])[* f,
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unsigned int l = ]b4_location_initial_line[u,
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unsigned int c = ]b4_location_initial_column[u)
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: begin (f, l, c)
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, end (f, l, c)
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{
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}
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])[
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/// Initialization.
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void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
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unsigned int l = ]b4_location_initial_line[u,
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unsigned int c = ]b4_location_initial_column[u)
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{
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begin.initialize (f, l, c);
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end = begin;
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}
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/** \name Line and Column related manipulators
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** \{ */
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public:
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/// Reset initial location to final location.
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void step ()
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{
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begin = end;
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}
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/// Extend the current location to the COUNT next columns.
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void columns (int count = 1)
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{
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end += count;
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}
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/// Extend the current location to the COUNT next lines.
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void lines (int count = 1)
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{
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end.lines (count);
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}
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/** \} */
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public:
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/// Beginning of the located region.
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position begin;
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/// End of the located region.
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position end;
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};
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/// Join two location objects to create a location.
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inline location operator+ (location res, const location& end)
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{
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res.end = end.end;
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return res;
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}
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/// Change end position in place.
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inline location& operator+= (location& res, int width)
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{
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res.columns (width);
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return res;
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}
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/// Change end position.
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inline location operator+ (location res, int width)
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{
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return res += width;
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}
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/// Change end position in place.
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inline location& operator-= (location& res, int width)
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{
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return res += -width;
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}
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/// Change end position.
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inline location operator- (const location& begin, int width)
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{
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return begin + -width;
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}
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]b4_percent_define_flag_if([[define_location_comparison]], [[
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/// Compare two location objects.
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inline bool
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operator== (const location& loc1, const location& loc2)
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{
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return loc1.begin == loc2.begin && loc1.end == loc2.end;
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}
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/// Compare two location objects.
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inline bool
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operator!= (const location& loc1, const location& loc2)
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{
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return !(loc1 == loc2);
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}
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]])[
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/** \brief Intercept output stream redirection.
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** \param ostr the destination output stream
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** \param loc a reference to the location to redirect
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**
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** Avoid duplicate information.
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*/
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template <typename YYChar>
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inline std::basic_ostream<YYChar>&
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operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
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{
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unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
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ostr << loc.begin// << "(" << loc.end << ") "
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;
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if (loc.end.filename
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&& (!loc.begin.filename
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|| *loc.begin.filename != *loc.end.filename))
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ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
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else if (loc.begin.line < loc.end.line)
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ostr << '-' << loc.end.line << '.' << end_col;
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else if (loc.begin.column < end_col)
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ostr << '-' << end_col;
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return ostr;
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}
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]])
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b4_defines_if([
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b4_output_begin([b4_dir_prefix[]position.hh])
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b4_copyright([Positions for Bison parsers in C++])[
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/**
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** \file ]b4_dir_prefix[position.hh
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** Define the ]b4_namespace_ref[::position class.
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*/
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]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[
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# include <algorithm> // std::max
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# include <iostream>
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# include <string>
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]b4_null_define[
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]b4_namespace_open[
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]b4_position_define[
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]b4_namespace_close[
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]b4_cpp_guard_close([b4_dir_prefix[]position.hh])
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b4_output_end()
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b4_output_begin([b4_dir_prefix[]location.hh])
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b4_copyright([Locations for Bison parsers in C++])[
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/**
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** \file ]b4_dir_prefix[location.hh
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** Define the ]b4_namespace_ref[::location class.
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*/
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]b4_cpp_guard_open([b4_dir_prefix[]location.hh])[
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# include "position.hh"
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]b4_namespace_open[
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]b4_location_define[
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]b4_namespace_close[
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]b4_cpp_guard_close([b4_dir_prefix[]location.hh])
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b4_output_end()
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])
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m4_popdef([b4_copyright_years])
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