1 // bind_tests_simple.cpp -- The Boost Lambda Library ------------------
2 //
3 // Copyright (C) 2000-2003 Jaakko Jarvi ([email protected])
4 // Copyright (C) 2000-2003 Gary Powell ([email protected])
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/core/lightweight_test.hpp>
16
17 #include "boost/lambda/bind.hpp"
18
19 #include <iostream>
20
21 using namespace boost::lambda;
22
23
sum_of_args_0()24 int sum_of_args_0() { return 0; }
sum_of_args_1(int a)25 int sum_of_args_1(int a) { return a; }
sum_of_args_2(int a,int b)26 int sum_of_args_2(int a, int b) { return a+b; }
sum_of_args_3(int a,int b,int c)27 int sum_of_args_3(int a, int b, int c) { return a+b+c; }
sum_of_args_4(int a,int b,int c,int d)28 int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; }
sum_of_args_5(int a,int b,int c,int d,int e)29 int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; }
sum_of_args_6(int a,int b,int c,int d,int e,int f)30 int sum_of_args_6(int a, int b, int c, int d, int e, int f) { return a+b+c+d+e+f; }
sum_of_args_7(int a,int b,int c,int d,int e,int f,int g)31 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; }
sum_of_args_8(int a,int b,int c,int d,int e,int f,int g,int h)32 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; }
sum_of_args_9(int a,int b,int c,int d,int e,int f,int g,int h,int i)33 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; }
34
35
36 // ----------------------------
37
38 class A {
39 int i;
40 public:
A(int n)41 A(int n) : i(n) {};
add(const int & j)42 int add(const int& j) { return i + j; }
43 };
44
test_member_functions()45 void test_member_functions()
46 {
47 using boost::ref;
48 A a(10);
49 int i = 1;
50
51 BOOST_TEST_EQ(bind(&A::add, ref(a), _1)(i), 11);
52 BOOST_TEST_EQ(bind(&A::add, &a, _1)(i), 11);
53 BOOST_TEST_EQ(bind(&A::add, _1, 1)(a), 11);
54 BOOST_TEST_EQ(bind(&A::add, _1, 1)(make_const(&a)), 11);
55
56 // This should fail, as lambda functors store arguments as const
57 // bind(&A::add, a, _1);
58 }
59
main()60 int main()
61 {
62 int i = 1; int j = 2; int k = 3;
63 int result;
64
65
66 // bind all parameters
67 BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
68 BOOST_TEST_EQ(bind(sum_of_args_1, 1)(), 1);
69 BOOST_TEST_EQ(bind(sum_of_args_2, 1, 2)(), 3);
70 BOOST_TEST_EQ(bind(sum_of_args_3, 1, 2, 3)(), 6);
71 BOOST_TEST_EQ(bind(sum_of_args_4, 1, 2, 3, 4)(), 10);
72 BOOST_TEST_EQ(bind(sum_of_args_5, 1, 2, 3, 4, 5)(), 15);
73 BOOST_TEST_EQ(bind(sum_of_args_6, 1, 2, 3, 4, 5, 6)(), 21);
74 BOOST_TEST_EQ(bind(sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)(), 28);
75 BOOST_TEST_EQ(bind(sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)(), 36);
76 BOOST_TEST_EQ(bind(sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)(), 45);
77
78 // first parameter open
79 BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
80 BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
81 BOOST_TEST_EQ(bind(sum_of_args_2, _1, 2)(i), 3);
82 BOOST_TEST_EQ(bind(sum_of_args_3, _1, 2, 3)(i), 6);
83 BOOST_TEST_EQ(bind(sum_of_args_4, _1, 2, 3, 4)(i), 10);
84 BOOST_TEST_EQ(bind(sum_of_args_5, _1, 2, 3, 4, 5)(i), 15);
85 BOOST_TEST_EQ(bind(sum_of_args_6, _1, 2, 3, 4, 5, 6)(i), 21);
86 BOOST_TEST_EQ(bind(sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i), 28);
87 BOOST_TEST_EQ(bind(sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i), 36);
88 BOOST_TEST_EQ(bind(sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i), 45);
89
90 // two open arguments
91 BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
92 BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
93 BOOST_TEST_EQ(bind(sum_of_args_2, _1, _2)(i, j), 3);
94 BOOST_TEST_EQ(bind(sum_of_args_3, _1, _2, 3)(i, j), 6);
95 BOOST_TEST_EQ(bind(sum_of_args_4, _1, _2, 3, 4)(i, j), 10);
96 BOOST_TEST_EQ(bind(sum_of_args_5, _1, _2, 3, 4, 5)(i, j), 15);
97 BOOST_TEST_EQ(bind(sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j), 21);
98 BOOST_TEST_EQ(bind(sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j), 28);
99 BOOST_TEST_EQ(bind(sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j), 36);
100 BOOST_TEST_EQ(bind(sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j), 45);
101
102 // three open arguments
103 BOOST_TEST_EQ(bind(sum_of_args_0)(), 0);
104 BOOST_TEST_EQ(bind(sum_of_args_1, _1)(i), 1);
105 BOOST_TEST_EQ(bind(sum_of_args_2, _1, _2)(i, j), 3);
106 BOOST_TEST_EQ(bind(sum_of_args_3, _1, _2, _3)(i, j, k), 6);
107 BOOST_TEST_EQ(bind(sum_of_args_4, _1, _2, _3, 4)(i, j, k), 10);
108 BOOST_TEST_EQ(bind(sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k), 15);
109 BOOST_TEST_EQ(bind(sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k), 21);
110 BOOST_TEST_EQ(bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k), 28);
111 BOOST_TEST_EQ(bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k), 36);
112 BOOST_TEST_EQ(bind(sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k), 45);
113
114 // function compositions with bind
115 BOOST_TEST_EQ(bind(sum_of_args_3, bind(sum_of_args_2, _1, 2), 2, 3)(i), 8);
116 BOOST_TEST_EQ(
117 bind(sum_of_args_9,
118 bind(sum_of_args_0), // 0
119 bind(sum_of_args_1, _1), // 1
120 bind(sum_of_args_2, _1, _2), // 3
121 bind(sum_of_args_3, _1, _2, _3), // 6
122 bind(sum_of_args_4, _1, _2, _3, 4), // 10
123 bind(sum_of_args_5, _1, _2, _3, 4, 5), // 15
124 bind(sum_of_args_6, _1, _2, _3, 4, 5, 6), // 21
125 bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7), // 28
126 bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8) // 36
127 )(i, j, k), 120);
128
129 // deeper nesting
130 result =
131 bind(sum_of_args_1, // 12
132 bind(sum_of_args_4, // 12
133 bind(sum_of_args_2, // 3
134 bind(sum_of_args_1, // 1
135 bind(sum_of_args_1, _1) // 1
136 ),
137 _2),
138 _2,
139 _3,
140 4)
141 )(i, j, k);
142 BOOST_TEST_EQ(result, 12);
143
144 test_member_functions();
145
146 return boost::report_errors();
147 }
148