algorithm/string/example/trim_example.cpp

//  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 <boost/algorithm/string/trim.hpp>
#include <boost/algorithm/string/classification.hpp>

using namespace std;
using namespace boost;

int main()
{
    cout << "* Trim Example *" << endl << endl;

    string str1("     1x x x x1     ");
    string str2("<>trim<>");
    string str3("123abs343");

    // Simple left trim
    cout << "trim_left copy of str1: " << "\"" << trim_left_copy( str1 ) << "\"" << endl;

    // Inplace right trim
    trim_right( str1 );
    cout << "trim_right on str1: " << "\"" << str1 << "\"" << endl;

    // Parametric trim. 'Space' is defined using is_any_of predicate
    cout 
        << "trimmed copy of str4 ( space='<>' ): " 
        << "\""<< trim_copy_if( str2, is_any_of("<>") ) << "\"" << endl;
    

    // Parametric trim. 'Space' is defined using is_digit predicate
    cout 
        << "trimmed copy of str5 ( space=digit ): " 
        << "\"" << trim_copy_if( str3, is_digit() ) << "\"" << endl;

    cout << endl;

    return 0;
}