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 int add2(int a1, int a2) { return i + a1 + a2; }
45 int add3(int a1, int a2, int a3) { return i + a1 + a2 + a3; }
46 int add4(int a1, int a2, int a3, int a4) { return i + a1 + a2 + a3 + a4; }
47 int add5(int a1, int a2, int a3, int a4, int a5)
48 { return i + a1 + a2 + a3 + a4 + a5; }
49 int add6(int a1, int a2, int a3, int a4, int a5, int a6)
50 { return i + a1 + a2 + a3 + a4 + a5 + a6; }
51 int add7(int a1, int a2, int a3, int a4, int a5, int a6, int a7)
52 { return i + a1 + a2 + a3 + a4 + a5 + a6 + a7; }
53 int add8(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8)
54 { return i + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8; }
55
56};
57
58void test_member_functions()
59{
60 using boost::ref;
61 A a(10);
62 int i = 1;
63
64
65
66
67 BOOST_CHECK(bind(&A::add, ref(a), _1)(i) == 11);
68 BOOST_CHECK(bind(&A::add, &a, _1)(i) == 11);
69 BOOST_CHECK(bind(&A::add, _1, 1)(a) == 11);
70 BOOST_CHECK(bind(&A::add, _1, 1)(make_const(&a)) == 11);
71
72 BOOST_CHECK(bind(&A::add2, _1, 1, 1)(a) == 12);
73 BOOST_CHECK(bind(&A::add3, _1, 1, 1, 1)(a) == 13);
74 BOOST_CHECK(bind(&A::add4, _1, 1, 1, 1, 1)(a) == 14);
75 BOOST_CHECK(bind(&A::add5, _1, 1, 1, 1, 1, 1)(a) == 15);
76 BOOST_CHECK(bind(&A::add6, _1, 1, 1, 1, 1, 1, 1)(a) == 16);
77 BOOST_CHECK(bind(&A::add7, _1, 1, 1, 1, 1, 1, 1, 1)(a) == 17);
78 BOOST_CHECK(bind(&A::add8, _1, 1, 1, 1, 1, 1, 1, 1, 1)(a) == 18);
79
80 // This should fail, as lambda functors store arguments as const
81 // bind(&A::add, a, _1);
82}
83
84struct B {
85 B(int n) : i(n) {};
86 int i;
87};
88
89void test_data_members()
90{
91 using boost::ref;
92 B b(10);
93 BOOST_CHECK(bind(&B::i, ref(b))() == 10);
94 BOOST_CHECK(bind(&B::i, b)() == 10);
95 BOOST_CHECK(bind(&B::i, _1)(b) == 10);
96 BOOST_CHECK(bind(&B::i, _1)(B(11)) == 11);
97 bind(a1: &B::i, a2: ref(t&: b))() = 1;
98 BOOST_CHECK(b.i == 1);
99}
100
101int main() {
102
103 int i = 1; int j = 2; int k = 3;
104 int result;
105
106 // bind all parameters
107 BOOST_CHECK(bind(&sum_of_args_0)()==0);
108 BOOST_CHECK(bind(&sum_of_args_1, 1)()==1);
109 BOOST_CHECK(bind(&sum_of_args_2, 1, 2)()==3);
110 BOOST_CHECK(bind(&sum_of_args_3, 1, 2, 3)()==6);
111 BOOST_CHECK(bind(&sum_of_args_4, 1, 2, 3, 4)()==10);
112 BOOST_CHECK(bind(&sum_of_args_5, 1, 2, 3, 4, 5)()==15);
113 BOOST_CHECK(bind(&sum_of_args_6, 1, 2, 3, 4, 5, 6)()==21);
114 BOOST_CHECK(bind(&sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)()==28);
115 BOOST_CHECK(bind(&sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)()==36);
116 BOOST_CHECK(bind(&sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)()==45);
117
118 // first parameter open
119 BOOST_CHECK(bind(&sum_of_args_0)()==0);
120 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
121 BOOST_CHECK(bind(&sum_of_args_2, _1, 2)(i)==3);
122 BOOST_CHECK(bind(&sum_of_args_3, _1, 2, 3)(i)==6);
123 BOOST_CHECK(bind(&sum_of_args_4, _1, 2, 3, 4)(i)==10);
124 BOOST_CHECK(bind(&sum_of_args_5, _1, 2, 3, 4, 5)(i)==15);
125 BOOST_CHECK(bind(&sum_of_args_6, _1, 2, 3, 4, 5, 6)(i)==21);
126 BOOST_CHECK(bind(&sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i)==28);
127 BOOST_CHECK(bind(&sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i)==36);
128 BOOST_CHECK(bind(&sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i)==45);
129
130 // two open arguments
131 BOOST_CHECK(bind(&sum_of_args_0)()==0);
132 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
133 BOOST_CHECK(bind(&sum_of_args_2, _1, _2)(i, j)==3);
134 BOOST_CHECK(bind(&sum_of_args_3, _1, _2, 3)(i, j)==6);
135 BOOST_CHECK(bind(&sum_of_args_4, _1, _2, 3, 4)(i, j)==10);
136 BOOST_CHECK(bind(&sum_of_args_5, _1, _2, 3, 4, 5)(i, j)==15);
137 BOOST_CHECK(bind(&sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j)==21);
138 BOOST_CHECK(bind(&sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j)==28);
139 BOOST_CHECK(bind(&sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j)==36);
140 BOOST_CHECK(bind(&sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j)==45);
141
142 // three open arguments
143 BOOST_CHECK(bind(&sum_of_args_0)()==0);
144 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
145 BOOST_CHECK(bind(&sum_of_args_2, _1, _2)(i, j)==3);
146 BOOST_CHECK(bind(&sum_of_args_3, _1, _2, _3)(i, j, k)==6);
147 BOOST_CHECK(bind(&sum_of_args_4, _1, _2, _3, 4)(i, j, k)==10);
148 BOOST_CHECK(bind(&sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k)==15);
149 BOOST_CHECK(bind(&sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k)==21);
150 BOOST_CHECK(bind(&sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k)==28);
151 BOOST_CHECK(bind(&sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k)==36);
152 BOOST_CHECK(bind(&sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k)==45);
153
154 // function compositions with bind
155 BOOST_CHECK(bind(&sum_of_args_3, bind(&sum_of_args_2, _1, 2), 2, 3)(i)==8);
156 BOOST_CHECK(
157 bind(&sum_of_args_9,
158 bind(&sum_of_args_0), // 0
159 bind(&sum_of_args_1, _1), // 1
160 bind(&sum_of_args_2, _1, _2), // 3
161 bind(&sum_of_args_3, _1, _2, _3), // 6
162 bind(&sum_of_args_4, _1, _2, _3, 4), // 10
163 bind(&sum_of_args_5, _1, _2, _3, 4, 5), // 15
164 bind(&sum_of_args_6, _1, _2, _3, 4, 5, 6), // 21
165 bind(&sum_of_args_7, _1, _2, _3, 4, 5, 6, 7), // 28
166 bind(&sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8) // 36
167 )(i, j, k) == 120);
168
169 // deeper nesting
170 result =
171 bind(a1: &sum_of_args_1, // 12
172 a2: bind(a1: &sum_of_args_4, // 12
173 a2: bind(a1: &sum_of_args_2, // 3
174 a2: bind(a1: &sum_of_args_1, // 1
175 a2: bind(a1: &sum_of_args_1, a2: _1) // 1
176 ),
177 a3: _2),
178 a3: _2,
179 a4: _3,
180 a5: 4)
181 )(i, j, k);
182 BOOST_CHECK(result == 12);
183
184 test_member_functions();
185
186
187 return boost::report_errors();
188}
189

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