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
22using namespace boost::lambda;
23
24
25int sum_of_args_0() { return 0; }
26int sum_of_args_1(int a) { return a; }
27int sum_of_args_2(int a, int b) { return a+b; }
28int sum_of_args_3(int a, int b, int c) { return a+b+c; }
29int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; }
30int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; }
31int sum_of_args_6(int a, int b, int c, int d, int e, int f) { return a+b+c+d+e+f; }
32int 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; }
33int 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; }
34int 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
39class A {
40 int i;
41public:
42 A(int n) : i(n) {};
43 int add(const int& j) { return i + j; }
44};
45
46void 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
61int 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

source code of boost/libs/lambda/test/bind_tests_simple_f_refs.cpp