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Commit 325cb400 authored by Ronald Charles Moore's avatar Ronald Charles Moore
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// A Bison parser, made by GNU Bison 3.5.4.
// Locations for Bison parsers in C++
// Copyright (C) 2002-2015, 2018-2020 Free Software Foundation, Inc.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// As a special exception, you may create a larger work that contains
// part or all of the Bison parser skeleton and distribute that work
// under terms of your choice, so long as that work isn't itself a
// parser generator using the skeleton or a modified version thereof
// as a parser skeleton. Alternatively, if you modify or redistribute
// the parser skeleton itself, you may (at your option) remove this
// special exception, which will cause the skeleton and the resulting
// Bison output files to be licensed under the GNU General Public
// License without this special exception.
// This special exception was added by the Free Software Foundation in
// version 2.2 of Bison.
/**
** \file location.hh
** Define the yy::location class.
*/
#ifndef YY_YY_LOCATION_HH_INCLUDED
# define YY_YY_LOCATION_HH_INCLUDED
# include <iostream>
# include <string>
# ifndef YY_NULLPTR
# if defined __cplusplus
# if 201103L <= __cplusplus
# define YY_NULLPTR nullptr
# else
# define YY_NULLPTR 0
# endif
# else
# define YY_NULLPTR ((void*)0)
# endif
# endif
namespace yy {
#line 58 "location.hh"
/// A point in a source file.
class position
{
public:
/// Type for line and column numbers.
typedef int counter_type;
/// Construct a position.
explicit position (std::string* f = YY_NULLPTR,
counter_type l = 1,
counter_type c = 1)
: filename (f)
, line (l)
, column (c)
{}
/// Initialization.
void initialize (std::string* fn = YY_NULLPTR,
counter_type l = 1,
counter_type c = 1)
{
filename = fn;
line = l;
column = c;
}
/** \name Line and Column related manipulators
** \{ */
/// (line related) Advance to the COUNT next lines.
void lines (counter_type count = 1)
{
if (count)
{
column = 1;
line = add_ (line, count, 1);
}
}
/// (column related) Advance to the COUNT next columns.
void columns (counter_type count = 1)
{
column = add_ (column, count, 1);
}
/** \} */
/// File name to which this position refers.
std::string* filename;
/// Current line number.
counter_type line;
/// Current column number.
counter_type column;
private:
/// Compute max (min, lhs+rhs).
static counter_type add_ (counter_type lhs, counter_type rhs, counter_type min)
{
return lhs + rhs < min ? min : lhs + rhs;
}
};
/// Add \a width columns, in place.
inline position&
operator+= (position& res, position::counter_type width)
{
res.columns (width);
return res;
}
/// Add \a width columns.
inline position
operator+ (position res, position::counter_type width)
{
return res += width;
}
/// Subtract \a width columns, in place.
inline position&
operator-= (position& res, position::counter_type width)
{
return res += -width;
}
/// Subtract \a width columns.
inline position
operator- (position res, position::counter_type width)
{
return res -= width;
}
/// Compare two position objects.
inline bool
operator== (const position& pos1, const position& pos2)
{
return (pos1.line == pos2.line
&& pos1.column == pos2.column
&& (pos1.filename == pos2.filename
|| (pos1.filename && pos2.filename
&& *pos1.filename == *pos2.filename)));
}
/// Compare two position objects.
inline bool
operator!= (const position& pos1, const position& pos2)
{
return !(pos1 == pos2);
}
/** \brief Intercept output stream redirection.
** \param ostr the destination output stream
** \param pos a reference to the position to redirect
*/
template <typename YYChar>
std::basic_ostream<YYChar>&
operator<< (std::basic_ostream<YYChar>& ostr, const position& pos)
{
if (pos.filename)
ostr << *pos.filename << ':';
return ostr << pos.line << '.' << pos.column;
}
/// Two points in a source file.
class location
{
public:
/// Type for line and column numbers.
typedef position::counter_type counter_type;
/// Construct a location from \a b to \a e.
location (const position& b, const position& e)
: begin (b)
, end (e)
{}
/// Construct a 0-width location in \a p.
explicit location (const position& p = position ())
: begin (p)
, end (p)
{}
/// Construct a 0-width location in \a f, \a l, \a c.
explicit location (std::string* f,
counter_type l = 1,
counter_type c = 1)
: begin (f, l, c)
, end (f, l, c)
{}
/// Initialization.
void initialize (std::string* f = YY_NULLPTR,
counter_type l = 1,
counter_type c = 1)
{
begin.initialize (f, l, c);
end = begin;
}
/** \name Line and Column related manipulators
** \{ */
public:
/// Reset initial location to final location.
void step ()
{
begin = end;
}
/// Extend the current location to the COUNT next columns.
void columns (counter_type count = 1)
{
end += count;
}
/// Extend the current location to the COUNT next lines.
void lines (counter_type count = 1)
{
end.lines (count);
}
/** \} */
public:
/// Beginning of the located region.
position begin;
/// End of the located region.
position end;
};
/// Join two locations, in place.
inline location&
operator+= (location& res, const location& end)
{
res.end = end.end;
return res;
}
/// Join two locations.
inline location
operator+ (location res, const location& end)
{
return res += end;
}
/// Add \a width columns to the end position, in place.
inline location&
operator+= (location& res, location::counter_type width)
{
res.columns (width);
return res;
}
/// Add \a width columns to the end position.
inline location
operator+ (location res, location::counter_type width)
{
return res += width;
}
/// Subtract \a width columns to the end position, in place.
inline location&
operator-= (location& res, location::counter_type width)
{
return res += -width;
}
/// Subtract \a width columns to the end position.
inline location
operator- (location res, location::counter_type width)
{
return res -= width;
}
/// Compare two location objects.
inline bool
operator== (const location& loc1, const location& loc2)
{
return loc1.begin == loc2.begin && loc1.end == loc2.end;
}
/// Compare two location objects.
inline bool
operator!= (const location& loc1, const location& loc2)
{
return !(loc1 == loc2);
}
/** \brief Intercept output stream redirection.
** \param ostr the destination output stream
** \param loc a reference to the location to redirect
**
** Avoid duplicate information.
*/
template <typename YYChar>
std::basic_ostream<YYChar>&
operator<< (std::basic_ostream<YYChar>& ostr, const location& loc)
{
location::counter_type end_col
= 0 < loc.end.column ? loc.end.column - 1 : 0;
ostr << loc.begin;
if (loc.end.filename
&& (!loc.begin.filename
|| *loc.begin.filename != *loc.end.filename))
ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
else if (loc.begin.line < loc.end.line)
ostr << '-' << loc.end.line << '.' << end_col;
else if (loc.begin.column < end_col)
ostr << '-' << end_col;
return ostr;
}
} // yy
#line 331 "location.hh"
#endif // !YY_YY_LOCATION_HH_INCLUDED
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Grammar
0 $accept: unit "end of file"
1 unit: assignments exp
2 assignments: %empty
3 | assignments assignment
4 assignment: "identifier" ":=" exp
5 exp: "number"
6 | "identifier"
7 | exp "+" exp
8 | exp "-" exp
9 | exp "*" exp
10 | exp "/" exp
11 | "(" exp ")"
Terminals, with rules where they appear
"end of file" (0) 0
error (256)
":=" (258) 4
"-" (259) 8
"+" (260) 7
"*" (261) 9
"/" (262) 10
"(" (263) 11
")" (264) 11
"identifier" <std::string> (265) 4 6
"number" <int> (266) 5
Nonterminals, with rules where they appear
$accept (12)
on left: 0
exp <int> (13)
on left: 5 6 7 8 9 10 11
on right: 1 4 7 8 9 10 11
unit (14)
on left: 1
on right: 0
assignments (15)
on left: 2 3
on right: 1 3
assignment (16)
on left: 4
on right: 3
State 0
0 $accept: . unit "end of file"
$default reduce using rule 2 (assignments)
unit go to state 1
assignments go to state 2
State 1
0 $accept: unit . "end of file"
"end of file" shift, and go to state 3
State 2
1 unit: assignments . exp
3 assignments: assignments . assignment
"(" shift, and go to state 4
"identifier" shift, and go to state 5
"number" shift, and go to state 6
exp go to state 7
assignment go to state 8
State 3
0 $accept: unit "end of file" .
$default accept
State 4
11 exp: "(" . exp ")"
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 10
State 5
4 assignment: "identifier" . ":=" exp
6 exp: "identifier" .
":=" shift, and go to state 11
$default reduce using rule 6 (exp)
State 6
5 exp: "number" .
$default reduce using rule 5 (exp)
State 7
1 unit: assignments exp .
7 exp: exp . "+" exp
8 | exp . "-" exp
9 | exp . "*" exp
10 | exp . "/" exp
"-" shift, and go to state 12
"+" shift, and go to state 13
"*" shift, and go to state 14
"/" shift, and go to state 15
$default reduce using rule 1 (unit)
State 8
3 assignments: assignments assignment .
$default reduce using rule 3 (assignments)
State 9
6 exp: "identifier" .
$default reduce using rule 6 (exp)
State 10
7 exp: exp . "+" exp
8 | exp . "-" exp
9 | exp . "*" exp
10 | exp . "/" exp
11 | "(" exp . ")"
"-" shift, and go to state 12
"+" shift, and go to state 13
"*" shift, and go to state 14
"/" shift, and go to state 15
")" shift, and go to state 16
State 11
4 assignment: "identifier" ":=" . exp
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 17
State 12
8 exp: exp "-" . exp
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 18
State 13
7 exp: exp "+" . exp
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 19
State 14
9 exp: exp "*" . exp
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 20
State 15
10 exp: exp "/" . exp
"(" shift, and go to state 4
"identifier" shift, and go to state 9
"number" shift, and go to state 6
exp go to state 21
State 16
11 exp: "(" exp ")" .
$default reduce using rule 11 (exp)
State 17
4 assignment: "identifier" ":=" exp .
7 exp: exp . "+" exp
8 | exp . "-" exp
9 | exp . "*" exp
10 | exp . "/" exp
"-" shift, and go to state 12
"+" shift, and go to state 13
"*" shift, and go to state 14
"/" shift, and go to state 15
$default reduce using rule 4 (assignment)
State 18
7 exp: exp . "+" exp
8 | exp . "-" exp
8 | exp "-" exp .
9 | exp . "*" exp
10 | exp . "/" exp
"*" shift, and go to state 14
"/" shift, and go to state 15
$default reduce using rule 8 (exp)
State 19
7 exp: exp . "+" exp
7 | exp "+" exp .
8 | exp . "-" exp
9 | exp . "*" exp
10 | exp . "/" exp
"*" shift, and go to state 14
"/" shift, and go to state 15
$default reduce using rule 7 (exp)
State 20
7 exp: exp . "+" exp
8 | exp . "-" exp
9 | exp . "*" exp
9 | exp "*" exp .
10 | exp . "/" exp
$default reduce using rule 9 (exp)
State 21
7 exp: exp . "+" exp
8 | exp . "-" exp
9 | exp . "*" exp
10 | exp . "/" exp
10 | exp "/" exp .
$default reduce using rule 10 (exp)
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