1 | // bind_tests_simple.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/core/lightweight_test.hpp> |
16 | #define BOOST_CHECK BOOST_TEST |
17 | |
18 | #include "boost/lambda/bind.hpp" |
19 | |
20 | #include <iostream> |
21 | |
22 | using namespace boost::lambda; |
23 | |
24 | |
25 | int sum_of_args_0() { return 0; } |
26 | int sum_of_args_1(int a) { return a; } |
27 | int sum_of_args_2(int a, int b) { return a+b; } |
28 | int sum_of_args_3(int a, int b, int c) { return a+b+c; } |
29 | int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; } |
30 | int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; } |
31 | int sum_of_args_6(int a, int b, int c, int d, int e, int f) { return a+b+c+d+e+f; } |
32 | 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; } |
33 | 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; } |
34 | 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; } |
35 | |
36 | |
37 | // ---------------------------- |
38 | |
39 | class A { |
40 | int i; |
41 | public: |
42 | A(int n) : i(n) {}; |
43 | int add(const int& j) { return i + j; } |
44 | }; |
45 | |
46 | void test_member_functions() |
47 | { |
48 | using boost::ref; |
49 | A a(10); |
50 | int i = 1; |
51 | |
52 | BOOST_CHECK(bind(&A::add, ref(a), _1)(i) == 11); |
53 | BOOST_CHECK(bind(&A::add, &a, _1)(i) == 11); |
54 | BOOST_CHECK(bind(&A::add, _1, 1)(a) == 11); |
55 | BOOST_CHECK(bind(&A::add, _1, 1)(make_const(&a)) == 11); |
56 | |
57 | // This should fail, as lambda functors store arguments as const |
58 | // bind(&A::add, a, _1); |
59 | } |
60 | |
61 | int main() { |
62 | |
63 | int i = 1; int j = 2; int k = 3; |
64 | int result; |
65 | |
66 | |
67 | // bind all parameters |
68 | BOOST_CHECK(bind(sum_of_args_0)()==0); |
69 | BOOST_CHECK(bind(sum_of_args_1, 1)()==1); |
70 | BOOST_CHECK(bind(sum_of_args_2, 1, 2)()==3); |
71 | BOOST_CHECK(bind(sum_of_args_3, 1, 2, 3)()==6); |
72 | BOOST_CHECK(bind(sum_of_args_4, 1, 2, 3, 4)()==10); |
73 | BOOST_CHECK(bind(sum_of_args_5, 1, 2, 3, 4, 5)()==15); |
74 | BOOST_CHECK(bind(sum_of_args_6, 1, 2, 3, 4, 5, 6)()==21); |
75 | BOOST_CHECK(bind(sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)()==28); |
76 | BOOST_CHECK(bind(sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)()==36); |
77 | BOOST_CHECK(bind(sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)()==45); |
78 | |
79 | // first parameter open |
80 | BOOST_CHECK(bind(sum_of_args_0)()==0); |
81 | BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1); |
82 | BOOST_CHECK(bind(sum_of_args_2, _1, 2)(i)==3); |
83 | BOOST_CHECK(bind(sum_of_args_3, _1, 2, 3)(i)==6); |
84 | BOOST_CHECK(bind(sum_of_args_4, _1, 2, 3, 4)(i)==10); |
85 | BOOST_CHECK(bind(sum_of_args_5, _1, 2, 3, 4, 5)(i)==15); |
86 | BOOST_CHECK(bind(sum_of_args_6, _1, 2, 3, 4, 5, 6)(i)==21); |
87 | BOOST_CHECK(bind(sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i)==28); |
88 | BOOST_CHECK(bind(sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i)==36); |
89 | BOOST_CHECK(bind(sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i)==45); |
90 | |
91 | // two open arguments |
92 | BOOST_CHECK(bind(sum_of_args_0)()==0); |
93 | BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1); |
94 | BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3); |
95 | BOOST_CHECK(bind(sum_of_args_3, _1, _2, 3)(i, j)==6); |
96 | BOOST_CHECK(bind(sum_of_args_4, _1, _2, 3, 4)(i, j)==10); |
97 | BOOST_CHECK(bind(sum_of_args_5, _1, _2, 3, 4, 5)(i, j)==15); |
98 | BOOST_CHECK(bind(sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j)==21); |
99 | BOOST_CHECK(bind(sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j)==28); |
100 | BOOST_CHECK(bind(sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j)==36); |
101 | BOOST_CHECK(bind(sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j)==45); |
102 | |
103 | // three open arguments |
104 | BOOST_CHECK(bind(sum_of_args_0)()==0); |
105 | BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1); |
106 | BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3); |
107 | BOOST_CHECK(bind(sum_of_args_3, _1, _2, _3)(i, j, k)==6); |
108 | BOOST_CHECK(bind(sum_of_args_4, _1, _2, _3, 4)(i, j, k)==10); |
109 | BOOST_CHECK(bind(sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k)==15); |
110 | BOOST_CHECK(bind(sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k)==21); |
111 | BOOST_CHECK(bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k)==28); |
112 | BOOST_CHECK(bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k)==36); |
113 | BOOST_CHECK(bind(sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k)==45); |
114 | |
115 | // function compositions with bind |
116 | BOOST_CHECK(bind(sum_of_args_3, bind(sum_of_args_2, _1, 2), 2, 3)(i)==8); |
117 | BOOST_CHECK( |
118 | bind(sum_of_args_9, |
119 | bind(sum_of_args_0), // 0 |
120 | bind(sum_of_args_1, _1), // 1 |
121 | bind(sum_of_args_2, _1, _2), // 3 |
122 | bind(sum_of_args_3, _1, _2, _3), // 6 |
123 | bind(sum_of_args_4, _1, _2, _3, 4), // 10 |
124 | bind(sum_of_args_5, _1, _2, _3, 4, 5), // 15 |
125 | bind(sum_of_args_6, _1, _2, _3, 4, 5, 6), // 21 |
126 | bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7), // 28 |
127 | bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8) // 36 |
128 | )(i, j, k) == 120); |
129 | |
130 | // deeper nesting |
131 | result = |
132 | bind(a1&: sum_of_args_1, // 12 |
133 | a2: bind(a1&: sum_of_args_4, // 12 |
134 | a2: bind(a1&: sum_of_args_2, // 3 |
135 | a2: bind(a1&: sum_of_args_1, // 1 |
136 | a2: bind(a1&: sum_of_args_1, a2: _1) // 1 |
137 | ), |
138 | a3: _2), |
139 | a3: _2, |
140 | a4: _3, |
141 | a5: 4) |
142 | )(i, j, k); |
143 | BOOST_CHECK(result == 12); |
144 | |
145 | test_member_functions(); |
146 | |
147 | |
148 | return boost::report_errors(); |
149 | } |
150 | |