ceph/src/boost/libs/lambda/test/phoenix_control_structures.cpp

   1 //  phoenix_style_control_structures.cpp  -- The Boost Lambda Library ------
   2 //
   3 // Copyright (C) 2000-2003 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
   4 // Copyright (C) 2000-2003 Gary Powell (powellg@amazon.com)
   5 //
   6 // Distributed under the Boost Software License, Version 1.0. (See
   7 // accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10 // For more information, see www.boost.org
  11
  12 // -----------------------------------------------------------------------
  13
  14
  15 #include <boost/test/minimal.hpp>    // see "Header Implementation Option"
  16
  17 #include "boost/lambda/lambda.hpp"
  18 #include "boost/lambda/if.hpp"
  19 #include "boost/lambda/loops.hpp"
  20
  21 #include <iostream>
  22 #include <vector>
  23 #include <list>
  24 #include <algorithm>
  25 #include <cmath>
  26 #include <cassert>
  27 #include <functional>
  28
  29
  30
  31 using namespace boost::lambda;
  32 using namespace std;
  33
  34
  35
  36 //  If-else, while, do-while, for statements
  37
  38
  39 int test_main(int, char *[]) {
  40
  41     vector<int> v;
  42     v.clear();
  43     v.push_back(1);
  44     v.push_back(2);
  45     v.push_back(3);
  46     v.push_back(4);
  47     v.push_back(5);
  48     v.push_back(6);
  49     v.push_back(7);
  50     v.push_back(8);
  51     v.push_back(9);
  52     v.push_back(10);
  53
  54     int sum = 0;
  55     //////////////////////////////////
  56     for_each(v.begin(), v.end(),
  57         if_(_1 > 3 && _1 <= 8)
  58         [
  59             sum += _1
  60         ]
  61     );
  62
  63     BOOST_CHECK(sum == 4+5+6+7+8);
  64
  65     int gt = 0, eq = 0, lt = 0;
  66     //////////////////////////////////
  67     for_each(v.begin(), v.end(),
  68         if_(_1 > 5)
  69         [
  70             ++var(gt)
  71         ]
  72         .else_
  73         [
  74             if_(_1 == 5)
  75             [
  76                 ++var(eq)
  77             ]
  78             .else_
  79             [
  80                 ++var(lt)
  81             ]
  82         ]
  83     );
  84
  85     BOOST_CHECK(lt==4);
  86     BOOST_CHECK(eq==1);
  87     BOOST_CHECK(gt==5);
  88
  89     vector<int> t = v;
  90
  91     int counta = 0;
  92     int countb = 0;
  93     //////////////////////////////////
  94     for_each(v.begin(), v.end(),
  95         (
  96             while_(_1--)
  97             [
  98                 ++var(counta)
  99             ],
 100             ++var(countb)
 101         )
 102     );
 103
 104     BOOST_CHECK(counta == 55);
 105     BOOST_CHECK(countb == 10);
 106
 107
 108     v = t;
 109
 110     counta = 0; countb = 0;
 111     //////////////////////////////////
 112     for_each(v.begin(), v.end(),
 113         (
 114             do_
 115             [
 116              ++var(counta)
 117             ]
 118             .while_(_1--),
 119             ++var(countb)
 120         )
 121     );
 122
 123     BOOST_CHECK(counta == (2+11)*10/2);
 124     BOOST_CHECK(countb == 10);
 125
 126
 127     v = t;
 128     counta = 0; countb = 0;
 129     //////////////////////////////////
 130     int iii;
 131     for_each(v.begin(), v.end(),
 132         (
 133             for_(var(iii) = 0, var(iii) < _1, ++var(iii))
 134             [
 135               ++var(counta)
 136             ],
 137             ++var(countb)
 138         )
 139     );
 140
 141     BOOST_CHECK(counta == (1+10)*10/2);
 142     BOOST_CHECK(countb == 10);
 143
 144     v = t;
 145
 146     return 0;
 147 }
 148