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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 /* Locations 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 location.hh
37 ** Define the yy::location class.
38 */
39
40 #ifndef BISON_LOCATION_HH
41 # define BISON_LOCATION_HH
42
43 # include <iostream>
44 # include <string>
45 # include "position.hh"
46
47 namespace yy
48 {
49
50 /// Abstract a location.
51 class location
52 {
53 public:
54
55 /// Construct a location.
56 location ()
57 : begin (), end ()
58 {
59 }
60
61
62 /// Initialization.
63 inline void initialize (std::string* fn)
64 {
65 begin.initialize (fn);
66 end = begin;
67 }
68
69 /** \name Line and Column related manipulators
70 ** \{ */
71 public:
72 /// Reset initial location to final location.
73 inline void step ()
74 {
75 begin = end;
76 }
77
78 /// Extend the current location to the COUNT next columns.
79 inline void columns (unsigned int count = 1)
80 {
81 end += count;
82 }
83
84 /// Extend the current location to the COUNT next lines.
85 inline void lines (unsigned int count = 1)
86 {
87 end.lines (count);
88 }
89 /** \} */
90
91
92 public:
93 /// Beginning of the located region.
94 position begin;
95 /// End of the located region.
96 position end;
97 };
98
99 /// Join two location objects to create a location.
100 inline const location operator+ (const location& begin, const location& end)
101 {
102 location res = begin;
103 res.end = end.end;
104 return res;
105 }
106
107 /// Add two location objects.
108 inline const location operator+ (const location& begin, unsigned int width)
109 {
110 location res = begin;
111 res.columns (width);
112 return res;
113 }
114
115 /// Add and assign a location.
116 inline location& operator+= (location& res, unsigned int width)
117 {
118 res.columns (width);
119 return res;
120 }
121
122 /** \brief Intercept output stream redirection.
123 ** \param ostr the destination output stream
124 ** \param loc a reference to the location to redirect
125 **
126 ** Avoid duplicate information.
127 */
128 inline std::ostream& operator<< (std::ostream& ostr, const location& loc)
129 {
130 position last = loc.end - 1;
131 ostr << loc.begin;
132 if (last.filename
133 && (!loc.begin.filename
134 || *loc.begin.filename != *last.filename))
135 ostr << '-' << last;
136 else if (loc.begin.line != last.line)
137 ostr << '-' << last.line << '.' << last.column;
138 else if (loc.begin.column != last.column)
139 ostr << '-' << last.column;
140 return ostr;
141 }
142
143 }
144
145 #endif // not BISON_LOCATION_HH