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/test/minimal.hpp> // see "Header Implementation Option"
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; }
add2(int a1,int a2)43 int add2(int a1, int a2) { return i + a1 + a2; }
add3(int a1,int a2,int a3)44 int add3(int a1, int a2, int a3) { return i + a1 + a2 + a3; }
add4(int a1,int a2,int a3,int a4)45 int add4(int a1, int a2, int a3, int a4) { return i + a1 + a2 + a3 + a4; }
add5(int a1,int a2,int a3,int a4,int a5)46 int add5(int a1, int a2, int a3, int a4, int a5)
47 { return i + a1 + a2 + a3 + a4 + a5; }
add6(int a1,int a2,int a3,int a4,int a5,int a6)48 int add6(int a1, int a2, int a3, int a4, int a5, int a6)
49 { return i + a1 + a2 + a3 + a4 + a5 + a6; }
add7(int a1,int a2,int a3,int a4,int a5,int a6,int a7)50 int add7(int a1, int a2, int a3, int a4, int a5, int a6, int a7)
51 { return i + a1 + a2 + a3 + a4 + a5 + a6 + a7; }
add8(int a1,int a2,int a3,int a4,int a5,int a6,int a7,int a8)52 int add8(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8)
53 { return i + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8; }
54
55 };
56
test_member_functions()57 void test_member_functions()
58 {
59 using boost::ref;
60 A a(10);
61 int i = 1;
62
63
64
65
66 BOOST_CHECK(bind(&A::add, ref(a), _1)(i) == 11);
67 BOOST_CHECK(bind(&A::add, &a, _1)(i) == 11);
68 BOOST_CHECK(bind(&A::add, _1, 1)(a) == 11);
69 BOOST_CHECK(bind(&A::add, _1, 1)(make_const(&a)) == 11);
70
71 BOOST_CHECK(bind(&A::add2, _1, 1, 1)(a) == 12);
72 BOOST_CHECK(bind(&A::add3, _1, 1, 1, 1)(a) == 13);
73 BOOST_CHECK(bind(&A::add4, _1, 1, 1, 1, 1)(a) == 14);
74 BOOST_CHECK(bind(&A::add5, _1, 1, 1, 1, 1, 1)(a) == 15);
75 BOOST_CHECK(bind(&A::add6, _1, 1, 1, 1, 1, 1, 1)(a) == 16);
76 BOOST_CHECK(bind(&A::add7, _1, 1, 1, 1, 1, 1, 1, 1)(a) == 17);
77 BOOST_CHECK(bind(&A::add8, _1, 1, 1, 1, 1, 1, 1, 1, 1)(a) == 18);
78
79 // This should fail, as lambda functors store arguments as const
80 // bind(&A::add, a, _1);
81 }
82
83 struct B {
BB84 B(int n) : i(n) {};
85 int i;
86 };
87
test_data_members()88 void test_data_members()
89 {
90 using boost::ref;
91 B b(10);
92 BOOST_CHECK(bind(&B::i, ref(b))() == 10);
93 BOOST_CHECK(bind(&B::i, b)() == 10);
94 BOOST_CHECK(bind(&B::i, _1)(b) == 10);
95 BOOST_CHECK(bind(&B::i, _1)(B(11)) == 11);
96 bind(&B::i, ref(b))() = 1;
97 BOOST_CHECK(b.i == 1);
98 }
99
test_main(int,char * [])100 int test_main(int, char *[]) {
101
102 int i = 1; int j = 2; int k = 3;
103 int result;
104
105 // bind all parameters
106 BOOST_CHECK(bind(&sum_of_args_0)()==0);
107 BOOST_CHECK(bind(&sum_of_args_1, 1)()==1);
108 BOOST_CHECK(bind(&sum_of_args_2, 1, 2)()==3);
109 BOOST_CHECK(bind(&sum_of_args_3, 1, 2, 3)()==6);
110 BOOST_CHECK(bind(&sum_of_args_4, 1, 2, 3, 4)()==10);
111 BOOST_CHECK(bind(&sum_of_args_5, 1, 2, 3, 4, 5)()==15);
112 BOOST_CHECK(bind(&sum_of_args_6, 1, 2, 3, 4, 5, 6)()==21);
113 BOOST_CHECK(bind(&sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)()==28);
114 BOOST_CHECK(bind(&sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)()==36);
115 BOOST_CHECK(bind(&sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)()==45);
116
117 // first parameter open
118 BOOST_CHECK(bind(&sum_of_args_0)()==0);
119 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
120 BOOST_CHECK(bind(&sum_of_args_2, _1, 2)(i)==3);
121 BOOST_CHECK(bind(&sum_of_args_3, _1, 2, 3)(i)==6);
122 BOOST_CHECK(bind(&sum_of_args_4, _1, 2, 3, 4)(i)==10);
123 BOOST_CHECK(bind(&sum_of_args_5, _1, 2, 3, 4, 5)(i)==15);
124 BOOST_CHECK(bind(&sum_of_args_6, _1, 2, 3, 4, 5, 6)(i)==21);
125 BOOST_CHECK(bind(&sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i)==28);
126 BOOST_CHECK(bind(&sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i)==36);
127 BOOST_CHECK(bind(&sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i)==45);
128
129 // two open arguments
130 BOOST_CHECK(bind(&sum_of_args_0)()==0);
131 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
132 BOOST_CHECK(bind(&sum_of_args_2, _1, _2)(i, j)==3);
133 BOOST_CHECK(bind(&sum_of_args_3, _1, _2, 3)(i, j)==6);
134 BOOST_CHECK(bind(&sum_of_args_4, _1, _2, 3, 4)(i, j)==10);
135 BOOST_CHECK(bind(&sum_of_args_5, _1, _2, 3, 4, 5)(i, j)==15);
136 BOOST_CHECK(bind(&sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j)==21);
137 BOOST_CHECK(bind(&sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j)==28);
138 BOOST_CHECK(bind(&sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j)==36);
139 BOOST_CHECK(bind(&sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j)==45);
140
141 // three open arguments
142 BOOST_CHECK(bind(&sum_of_args_0)()==0);
143 BOOST_CHECK(bind(&sum_of_args_1, _1)(i)==1);
144 BOOST_CHECK(bind(&sum_of_args_2, _1, _2)(i, j)==3);
145 BOOST_CHECK(bind(&sum_of_args_3, _1, _2, _3)(i, j, k)==6);
146 BOOST_CHECK(bind(&sum_of_args_4, _1, _2, _3, 4)(i, j, k)==10);
147 BOOST_CHECK(bind(&sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k)==15);
148 BOOST_CHECK(bind(&sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k)==21);
149 BOOST_CHECK(bind(&sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k)==28);
150 BOOST_CHECK(bind(&sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k)==36);
151 BOOST_CHECK(bind(&sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k)==45);
152
153 // function compositions with bind
154 BOOST_CHECK(bind(&sum_of_args_3, bind(&sum_of_args_2, _1, 2), 2, 3)(i)==8);
155 BOOST_CHECK(
156 bind(&sum_of_args_9,
157 bind(&sum_of_args_0), // 0
158 bind(&sum_of_args_1, _1), // 1
159 bind(&sum_of_args_2, _1, _2), // 3
160 bind(&sum_of_args_3, _1, _2, _3), // 6
161 bind(&sum_of_args_4, _1, _2, _3, 4), // 10
162 bind(&sum_of_args_5, _1, _2, _3, 4, 5), // 15
163 bind(&sum_of_args_6, _1, _2, _3, 4, 5, 6), // 21
164 bind(&sum_of_args_7, _1, _2, _3, 4, 5, 6, 7), // 28
165 bind(&sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8) // 36
166 )(i, j, k) == 120);
167
168 // deeper nesting
169 result =
170 bind(&sum_of_args_1, // 12
171 bind(&sum_of_args_4, // 12
172 bind(&sum_of_args_2, // 3
173 bind(&sum_of_args_1, // 1
174 bind(&sum_of_args_1, _1) // 1
175 ),
176 _2),
177 _2,
178 _3,
179 4)
180 )(i, j, k);
181 BOOST_CHECK(result == 12);
182
183 test_member_functions();
184
185
186 return 0;
187 }
188