String Algorithm Library: initial commit

[SVN r22431]

string/example/regex_example.cpp

@@ -0,0 +1,42 @@
+//  Boost string_algo library example file  ---------------------------------//
+
+//  Copyright Pavol Droba 2002-2003. Use, modification and
+//  distribution is subject to the Boost Software License, Version
+//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for updates, documentation, and revision history.
+
+#include <string>
+#include <iostream>
+#include <iterator>
+#include <boost/regex.hpp>
+#include <boost/algorithm/string/regex.hpp>
+
+using namespace std;
+using namespace boost;
+
+int main()
+{  
+    cout << "* Regex Example *" << endl << endl;
+
+    string str1("abc__(456)__123__(123)__cde");
+
+    // Replace all substrings matching (digit+) 
+    cout << 
+        "replace all (digit+) in str1 with #digit+# :" <<
+        replace_all_regex_copy( str1, regex("\\(([0-9]+)\\)"), string("#$1#") ) << endl;
+    
+    // Erase all substrings matching (digit+) 
+    cout << 
+        "remove all sequences of letters from str1 :" <<
+        erase_all_regex_copy( str1, regex("[[:alpha:]]+") ) << endl;
+
+    // in-place regex transformation
+    replace_all_regex( str1, regex("_(\\([^\\)]*\\))_"), string("-$1-") );
+    cout << "transformad str1: " << str1 << endl;
+
+    cout << endl;
+
+    return 0;
+}