boost_phoenix 0.1.0

Boost C++ library boost_phoenix packaged using Zanbil
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

//  bind_tests_simple.cpp  -- The Boost Lambda Library ------------------
//
// Copyright (C) 2000-2003 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
// Copyright (C) 2000-2003 Gary Powell (powellg@amazon.com)
//
// Distributed under 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)
//
// For more information, see www.boost.org

// -----------------------------------------------------------------------


#include <boost/core/lightweight_test.hpp>

#include "boost/lambda/bind.hpp"

#include <iostream>

using namespace boost::lambda;


int sum_of_args_0() { return 0; }
int sum_of_args_1(int a) { return a; }
int sum_of_args_2(int a, int b) { return a+b; }
int sum_of_args_3(int a, int b, int c) { return a+b+c; }
int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; }
int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; }
int sum_of_args_6(int a, int b, int c, int d, int e, int f) { return a+b+c+d+e+f; }
int sum_of_args_7(int a, int b, int c, int d, int e, int f, int g) { return a+b+c+d+e+f+g; }
int sum_of_args_8(int a, int b, int c, int d, int e, int f, int g, int h) { return a+b+c+d+e+f+g+h; }
int sum_of_args_9(int a, int b, int c, int d, int e, int f, int g, int h, int i) { return a+b+c+d+e+f+g+h+i; }


// ----------------------------

class A {
  int i; 
public:
  A(int n) : i(n) {};
  int add(const int& j) { return i + j; }
};

void test_member_functions()
{
  using boost::ref;
  A a(10);
  int i = 1;

  BOOST_TEST_EQ(bind(&A::add, ref(a), _1)(i), 11);
  BOOST_TEST_EQ(bind(&A::add, &a, _1)(i), 11);
  BOOST_TEST_EQ(bind(&A::add, _1, 1)(a), 11);
  BOOST_TEST_EQ(bind(&A::add, _1, 1)(make_const(&a)), 11);

  // This should fail, as lambda functors store arguments as const
  // bind(&A::add, a, _1); 
}

int main()
{
  int i = 1; int j = 2; int k = 3;
  int result;
   

  // bind all parameters
  BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
  BOOST_TEST_EQ(bind(sum_of_args_1, 1)(), 1);
  BOOST_TEST_EQ(bind(sum_of_args_2, 1, 2)(), 3);
  BOOST_TEST_EQ(bind(sum_of_args_3, 1, 2, 3)(), 6);
  BOOST_TEST_EQ(bind(sum_of_args_4, 1, 2, 3, 4)(), 10);
  BOOST_TEST_EQ(bind(sum_of_args_5, 1, 2, 3, 4, 5)(), 15);
  BOOST_TEST_EQ(bind(sum_of_args_6, 1, 2, 3, 4, 5, 6)(), 21);
  BOOST_TEST_EQ(bind(sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)(), 28);
  BOOST_TEST_EQ(bind(sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)(), 36);
  BOOST_TEST_EQ(bind(sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)(), 45);

  // first parameter open
  BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
  BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
  BOOST_TEST_EQ(bind(sum_of_args_2, _1, 2)(i), 3);
  BOOST_TEST_EQ(bind(sum_of_args_3, _1, 2, 3)(i), 6);
  BOOST_TEST_EQ(bind(sum_of_args_4, _1, 2, 3, 4)(i), 10);
  BOOST_TEST_EQ(bind(sum_of_args_5, _1, 2, 3, 4, 5)(i), 15);
  BOOST_TEST_EQ(bind(sum_of_args_6, _1, 2, 3, 4, 5, 6)(i), 21);
  BOOST_TEST_EQ(bind(sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i), 28);
  BOOST_TEST_EQ(bind(sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i), 36);
  BOOST_TEST_EQ(bind(sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i), 45);

  // two open arguments 
  BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
  BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
  BOOST_TEST_EQ(bind(sum_of_args_2, _1, _2)(i, j), 3);
  BOOST_TEST_EQ(bind(sum_of_args_3, _1, _2, 3)(i, j), 6);
  BOOST_TEST_EQ(bind(sum_of_args_4, _1, _2, 3, 4)(i, j), 10);
  BOOST_TEST_EQ(bind(sum_of_args_5, _1, _2, 3, 4, 5)(i, j), 15);
  BOOST_TEST_EQ(bind(sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j), 21);
  BOOST_TEST_EQ(bind(sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j), 28);
  BOOST_TEST_EQ(bind(sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j), 36);
  BOOST_TEST_EQ(bind(sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j), 45);

  // three open arguments 
  BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
  BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
  BOOST_TEST_EQ(bind(sum_of_args_2, _1, _2)(i, j), 3);
  BOOST_TEST_EQ(bind(sum_of_args_3, _1, _2, _3)(i, j, k), 6);
  BOOST_TEST_EQ(bind(sum_of_args_4, _1, _2, _3, 4)(i, j, k), 10);
  BOOST_TEST_EQ(bind(sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k), 15);
  BOOST_TEST_EQ(bind(sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k), 21);
  BOOST_TEST_EQ(bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k), 28);
  BOOST_TEST_EQ(bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k), 36);
  BOOST_TEST_EQ(bind(sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k), 45);
   
  // function compositions with bind
  BOOST_TEST_EQ(bind(sum_of_args_3, bind(sum_of_args_2, _1, 2), 2, 3)(i), 8);
  BOOST_TEST_EQ(
    bind(sum_of_args_9,
       bind(sum_of_args_0),                             // 0
       bind(sum_of_args_1, _1),                         // 1
       bind(sum_of_args_2, _1, _2),                     // 3   
       bind(sum_of_args_3, _1, _2, _3),                 // 6 
       bind(sum_of_args_4, _1, _2, _3, 4),              // 10
       bind(sum_of_args_5, _1, _2, _3, 4, 5),           // 15
       bind(sum_of_args_6, _1, _2, _3, 4, 5, 6),        // 21
       bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7),     // 28
       bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)   // 36
    )(i, j, k), 120);

  // deeper nesting
  result = 
    bind(sum_of_args_1,                        // 12
       bind(sum_of_args_4,                     // 12
            bind(sum_of_args_2,                // 3
                 bind(sum_of_args_1,           // 1
                      bind(sum_of_args_1, _1)  // 1
                      ), 
                 _2),
            _2,
            _3,
            4)
     )(i, j, k);
   BOOST_TEST_EQ(result, 12);

  test_member_functions();

  return boost::report_errors();
}