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ci_less.h
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1/* +---------------------------------------------------------------------------+
2 | Mobile Robot Programming Toolkit (MRPT) |
3 | http://www.mrpt.org/ |
4 | |
5 | Copyright (c) 2005-2016, Individual contributors, see AUTHORS file |
6 | See: http://www.mrpt.org/Authors - All rights reserved. |
7 | Released under BSD License. See details in http://www.mrpt.org/License |
8 +---------------------------------------------------------------------------+ */
9#pragma once
10
11#include <functional> // binary_function
12#include <cctype> // tolower
13#include <string>
14
15namespace mrpt
16{
17 namespace utils
18 {
19 /** \addtogroup stlext_grp STL extensions and metaprogramming
20 * \ingroup mrpt_base_grp
21 * @{ */
22
23 /** A case-insensitive comparator struct for usage within STL containers, eg: map<string,string,ci_less>
24 * \note Defined in #include <mrpt/utils/ci_less.h>
25 */
26 struct ci_less : std::binary_function<std::string,std::string,bool>
27 {
28 // case-independent (ci) compare_less binary function
29 struct nocase_compare : public std::binary_function<char,char,bool> {
30 bool operator()(const char c1, const char c2) const { return tolower(c1)<tolower(c2); }
31 };
32 bool operator() (const std::string & s1, const std::string & s2) const {
33 return std::lexicographical_compare(s1.begin(),s1.end(), s2.begin(),s2.end(), nocase_compare());
34 }
35 }; // end of ci_less
36
37 /** @} */ // end of grouping
38 } // End of namespace
39} // End of namespace
This is the global namespace for all Mobile Robot Programming Toolkit (MRPT) libraries.
bool operator()(const char c1, const char c2) const
Definition ci_less.h:30
A case-insensitive comparator struct for usage within STL containers, eg: map<string,...
Definition ci_less.h:27
bool operator()(const std::string &s1, const std::string &s2) const
Definition ci_less.h:32



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