ceph/src/boost/libs/lambda/test/bind_tests_simple.cpp

   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
  24 int sum_of_args_0() { return 0; }
  25 int sum_of_args_1(int a) { return a; }
  26 int sum_of_args_2(int a, int b) { return a+b; }
  27 int sum_of_args_3(int a, int b, int c) { return a+b+c; }
  28 int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; }
  29 int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; }
  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; }
  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; }
  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; }
  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:
  41   A(int n) : i(n) {};
  42   int add(const int& j) { return i + j; }
  43   int add2(int a1, int a2) { return i + a1 + a2; }
  44   int add3(int a1, int a2, int a3) { return i + a1 + a2 + a3; }
  45   int add4(int a1, int a2, int a3, int a4) { return i + a1 + a2 + a3 + a4; }
  46   int add5(int a1, int a2, int a3, int a4, int a5)
  47   { return i + a1 + a2 + a3 + a4 + a5; }
  48   int add6(int a1, int a2, int a3, int a4, int a5, int a6)
  49   { return i + a1 + a2 + a3 + a4 + a5 + a6; }
  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; }
  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
  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 {
  84   B(int n) : i(n) {};
  85   int i;
  86 };
  87
  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
 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 }