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author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Mon, 09 May 2011 03:11:59 +0900
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1 /* A Bison parser, made by GNU Bison 2.3. */
2
3 /* Positions for Bison parsers in C++
4
5 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22 /* As a special exception, you may create a larger work that contains
23 part or all of the Bison parser skeleton and distribute that work
24 under terms of your choice, so long as that work isn't itself a
25 parser generator using the skeleton or a modified version thereof
26 as a parser skeleton. Alternatively, if you modify or redistribute
27 the parser skeleton itself, you may (at your option) remove this
28 special exception, which will cause the skeleton and the resulting
29 Bison output files to be licensed under the GNU General Public
30 License without this special exception.
31
32 This special exception was added by the Free Software Foundation in
33 version 2.2 of Bison. */
34
35 /**
36 ** \file position.hh
37 ** Define the yy::position class.
38 */
39
40 #ifndef BISON_POSITION_HH
41 # define BISON_POSITION_HH
42
43 # include <iostream>
44 # include <string>
45
46 namespace yy
47 {
48 /// Abstract a position.
49 class position
50 {
51 public:
52
53 /// Construct a position.
54 position ()
55 : filename (0), line (1), column (0)
56 {
57 }
58
59
60 /// Initialization.
61 inline void initialize (std::string* fn)
62 {
63 filename = fn;
64 line = 1;
65 column = 0;
66 }
67
68 /** \name Line and Column related manipulators
69 ** \{ */
70 public:
71 /// (line related) Advance to the COUNT next lines.
72 inline void lines (int count = 1)
73 {
74 column = 0;
75 line += count;
76 }
77
78 /// (column related) Advance to the COUNT next columns.
79 inline void columns (int count = 1)
80 {
81 int leftmost = 0;
82 int current = column;
83 if (leftmost <= current + count)
84 column += count;
85 else
86 column = 0;
87 }
88 /** \} */
89
90 public:
91 /// File name to which this position refers.
92 std::string* filename;
93 /// Current line number.
94 unsigned int line;
95 /// Current column number.
96 unsigned int column;
97 };
98
99 /// Add and assign a position.
100 inline const position&
101 operator+= (position& res, const int width)
102 {
103 res.columns (width);
104 return res;
105 }
106
107 /// Add two position objects.
108 inline const position
109 operator+ (const position& begin, const int width)
110 {
111 position res = begin;
112 return res += width;
113 }
114
115 /// Add and assign a position.
116 inline const position&
117 operator-= (position& res, const int width)
118 {
119 return res += -width;
120 }
121
122 /// Add two position objects.
123 inline const position
124 operator- (const position& begin, const int width)
125 {
126 return begin + -width;
127 }
128
129 /** \brief Intercept output stream redirection.
130 ** \param ostr the destination output stream
131 ** \param pos a reference to the position to redirect
132 */
133 inline std::ostream&
134 operator<< (std::ostream& ostr, const position& pos)
135 {
136 if (pos.filename)
137 ostr << *pos.filename << ':';
138 return ostr << pos.line << '.' << pos.column;
139 }
140
141 }
142 #endif // not BISON_POSITION_HH