source: trunk/yat/utility/stl_utility.h @ 767

Last change on this file since 767 was 767, checked in by Peter, 15 years ago

Fixes #65

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.5 KB
Line 
1#ifndef _theplu_yat_utility_stl_utility_
2#define _theplu_yat_utility_stl_utility_
3
4// $Id: stl_utility.h 767 2007-02-22 15:14:40Z peter $
5
6/*
7  Copyright (C) 2004 Jari Häkkinen
8  Copyright (C) 2005 Jari Häkkinen, Peter Johansson, Markus Ringnér
9  Copyright (C) 2006, 2007 Jari Häkkinen
10
11  This file is part of the yat library, http://lev.thep.lu.se/trac/yat
12
13  The yat library is free software; you can redistribute it and/or
14  modify it under the terms of the GNU General Public License as
15  published by the Free Software Foundation; either version 2 of the
16  License, or (at your option) any later version.
17
18  The yat library is distributed in the hope that it will be useful,
19  but WITHOUT ANY WARRANTY; without even the implied warranty of
20  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21  General Public License for more details.
22
23  You should have received a copy of the GNU General Public License
24  along with this program; if not, write to the Free Software
25  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26  02111-1307, USA.
27*/
28
29///
30/// \file stl_utility.h
31///
32/// There are a number of useful functionality missing in the Standard
33/// Template Library, STL. This file is an effort to provide
34/// extensions to STL functionality.
35///
36
37#include <ostream>
38#include <string>
39#include <utility>
40
41namespace std {
42
43  ///
44  /// Print out a pair
45  ///
46  // This is in namespace std because we have not figured out how to have
47  // pair and its operator<< in different namespaces
48  template <class T1, class T2> 
49  std::ostream& operator<<(std::ostream& out, const std::pair<T1,T2>& p) 
50  { out << p.first << "\t" << p.second; return out; }
51
52}
53
54namespace theplu {
55namespace yat {
56namespace utility {
57
58
59  ///
60  /// @brief Functor comparing pairs using second.
61  ///
62  /// STL provides operator< for the pair.first element, but none for
63  /// pair.second. This template provides this and can be used as the
64  /// comparison object in generic functions such as the STL sort.
65  ///
66  template <class T1,class T2>
67  struct pair_value_compare
68  {
69    ///
70    /// @return true if x.second<y.second or (x.second==y.second and
71    /// x.first<y.first)
72    ///
73    inline bool operator()(const std::pair<T1,T2>& x,
74                           const std::pair<T1,T2>& y) {
75      return ((x.second<y.second) ||
76              (!(y.second<x.second) && (x.first<y.first))); 
77    }
78  };
79
80  ///
81  /// @brief Function converting a string to lower case
82  ///
83  void to_lower(std::string& s);
84
85  ///
86  /// @brief Function converting a string to upper case
87  ///
88  void to_upper(std::string& s);
89
90}}} // of namespace utility, yat, and theplu
91
92#endif
Note: See TracBrowser for help on using the repository browser.