ceph/src/boost/libs/test/test/utils-ts/foreach-test.cpp

   1 //  (C) Copyright Gennadiy Rozental 2001-2015.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //  File        : $RCSfile$
   9 //
  10 //  Version     : $Revision$
  11 //
  12 //  Description : BOOST_TEST_FOREACH compile only test
  13 // *****************************************************************************
  14
  15 // STL
  16 #include <iostream>
  17 #include <list>
  18 #include <vector>
  19 #include <string>
  20
  21 #include <boost/test/utils/foreach.hpp>
  22
  23 #ifdef BOOST_MSVC
  24 #pragma warning(disable:4702) // Unreachable code
  25 #endif
  26
  27 template<class T>
  28 void baz( std::list<T>const& list_of_T )
  29 {
  30     // an example of using BOOST_TEST_FOREACH with dependent types
  31     BOOST_TEST_FOREACH( T const&, t, list_of_T )
  32     {
  33         std::cout << t << std::endl;
  34     }
  35 }
  36
  37 int main()
  38 {
  39     std::list<int> int_list;
  40     int_list.push_back( 1 );
  41     int_list.push_back( 2 );
  42     int_list.push_back( 3 );
  43
  44     // use BOOST_TEST_FOREACH with a STL container, and a reference as the loop variable.
  45     BOOST_TEST_FOREACH( int&, i, int_list )
  46     {
  47         ++i;
  48         std::cout << i << std::endl;
  49     }
  50
  51     std::cout << std::endl;
  52
  53     // use BOOST_TEST_FOREACH with a std::vector
  54     std::vector<int> int_vec;
  55     int_vec.push_back( 1 );
  56     int_vec.push_back( 2 );
  57     int_vec.push_back( 3 );
  58     int_vec.push_back( 3 );
  59     int_vec.push_back( 3 );
  60
  61     BOOST_TEST_FOREACH( int const&, i, int_vec )
  62     {
  63         std::cout << i << std::endl;
  64         if( i == 3 )
  65             break;
  66     }
  67
  68     std::cout << std::endl;
  69
  70     // use BOOST_TEST_FOREACH with dependent types
  71     baz( int_list );
  72     std::cout << std::endl;
  73
  74     // iterate over characters in a std::string
  75     std::string str( "hello" );
  76
  77     BOOST_TEST_FOREACH( char&, ch, str )
  78     {
  79         std::cout << ch;
  80         // mutate the string
  81         ++ch;
  82     }
  83     std::cout << std::endl;
  84     std::cout << std::endl;
  85
  86     BOOST_TEST_FOREACH( char, ch, str )
  87     {
  88         // break work as you would expect
  89         std::cout << ch;
  90         break;
  91     }
  92     std::cout << std::endl;
  93     std::cout << std::endl;
  94
  95     BOOST_TEST_FOREACH( char, ch, str )
  96     {
  97         // continue work as you would expect
  98         if( ch == 'm' )
  99             continue;
 100
 101         std::cout << ch;
 102     }
 103     std::cout << std::endl;
 104     std::cout << std::endl;
 105
 106     // use BOOST_TEST_FOREACH with const reference.
 107     std::vector<int> const& int_vec_const_ref = int_vec;
 108
 109     BOOST_TEST_FOREACH( int const&, i, int_vec_const_ref )
 110     {
 111         std::cout << (i+1) << std::endl;
 112     }
 113     std::cout << std::endl;
 114
 115     return 0;
 116 }