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1	// Boost string_algo library example file ---------------------------------//
2
3	// Copyright Pavol Droba 2002-2003. Use, modification and
4	// distribution is subject to the Boost Software License, Version
5	// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6	// http://www.boost.org/LICENSE_1_0.txt)
7
8	// See http://www.boost.org for updates, documentation, and revision history.
9
10	#include <string>
11	#include <iostream>
12	#include <iterator>
13	#include <boost/regex.hpp>
14	#include <boost/algorithm/string/regex.hpp>
15
16	using namespace std;
17	using namespace boost;
18
19	int main()
20	{
21	cout << "* Regex Example *" << endl << endl;
22
23	string str1("abc__(456)__123__(123)__cde");
24
25	// Replace all substrings matching (digit+)
26	cout <<
27	"replace all (digit+) in str1 with #digit+# :" <<
28	replace_all_regex_copy( Input: str1, Rx: regex ("\$([0-9]+)\$"), Format: string ("#$1#") ) << endl;
29
30	// Erase all substrings matching (digit+)
31	cout <<
32	"remove all sequences of letters from str1 :" <<
33	erase_all_regex_copy( Input: str1, Rx: regex ("[[:alpha:]]+") ) << endl;
34
35	// in-place regex transformation
36	replace_all_regex( Input&: str1, Rx: regex ("_(\$[^\$]*\\))_"), Format: string ("-$1-") );
37	cout << "transformad str1: " << str1 << endl;
38
39	cout << endl;
40
41	return `0`;
42	}
43

regex_example.cpp