ceph/src/boost/libs/lambda/test/bind_tests_simple_f_refs.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 };
  44
  45 void test_member_functions()
  46 {
  47   using boost::ref;
  48   A a(10);
  49   int i = 1;
  50
  51   BOOST_CHECK(bind(&A::add, ref(a), _1)(i) == 11);
  52   BOOST_CHECK(bind(&A::add, &a, _1)(i) == 11);
  53   BOOST_CHECK(bind(&A::add, _1, 1)(a) == 11);
  54   BOOST_CHECK(bind(&A::add, _1, 1)(make_const(&a)) == 11);
  55
  56   // This should fail, as lambda functors store arguments as const
  57   // bind(&A::add, a, _1);
  58 }
  59
  60 int test_main(int, char *[]) {
  61
  62   int i = 1; int j = 2; int k = 3;
  63   int result;
  64
  65
  66   // bind all parameters
  67   BOOST_CHECK(bind(sum_of_args_0)()==0);
  68   BOOST_CHECK(bind(sum_of_args_1, 1)()==1);
  69   BOOST_CHECK(bind(sum_of_args_2, 1, 2)()==3);
  70   BOOST_CHECK(bind(sum_of_args_3, 1, 2, 3)()==6);
  71   BOOST_CHECK(bind(sum_of_args_4, 1, 2, 3, 4)()==10);
  72   BOOST_CHECK(bind(sum_of_args_5, 1, 2, 3, 4, 5)()==15);
  73   BOOST_CHECK(bind(sum_of_args_6, 1, 2, 3, 4, 5, 6)()==21);
  74   BOOST_CHECK(bind(sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)()==28);
  75   BOOST_CHECK(bind(sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)()==36);
  76   BOOST_CHECK(bind(sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)()==45);
  77
  78   // first parameter open
  79   BOOST_CHECK(bind(sum_of_args_0)()==0);
  80   BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
  81   BOOST_CHECK(bind(sum_of_args_2, _1, 2)(i)==3);
  82   BOOST_CHECK(bind(sum_of_args_3, _1, 2, 3)(i)==6);
  83   BOOST_CHECK(bind(sum_of_args_4, _1, 2, 3, 4)(i)==10);
  84   BOOST_CHECK(bind(sum_of_args_5, _1, 2, 3, 4, 5)(i)==15);
  85   BOOST_CHECK(bind(sum_of_args_6, _1, 2, 3, 4, 5, 6)(i)==21);
  86   BOOST_CHECK(bind(sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i)==28);
  87   BOOST_CHECK(bind(sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i)==36);
  88   BOOST_CHECK(bind(sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i)==45);
  89
  90   // two open arguments
  91   BOOST_CHECK(bind(sum_of_args_0)()==0);
  92   BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
  93   BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3);
  94   BOOST_CHECK(bind(sum_of_args_3, _1, _2, 3)(i, j)==6);
  95   BOOST_CHECK(bind(sum_of_args_4, _1, _2, 3, 4)(i, j)==10);
  96   BOOST_CHECK(bind(sum_of_args_5, _1, _2, 3, 4, 5)(i, j)==15);
  97   BOOST_CHECK(bind(sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j)==21);
  98   BOOST_CHECK(bind(sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j)==28);
  99   BOOST_CHECK(bind(sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j)==36);
 100   BOOST_CHECK(bind(sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j)==45);
 101
 102   // three open arguments
 103   BOOST_CHECK(bind(sum_of_args_0)()==0);
 104   BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
 105   BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3);
 106   BOOST_CHECK(bind(sum_of_args_3, _1, _2, _3)(i, j, k)==6);
 107   BOOST_CHECK(bind(sum_of_args_4, _1, _2, _3, 4)(i, j, k)==10);
 108   BOOST_CHECK(bind(sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k)==15);
 109   BOOST_CHECK(bind(sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k)==21);
 110   BOOST_CHECK(bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k)==28);
 111   BOOST_CHECK(bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k)==36);
 112   BOOST_CHECK(bind(sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k)==45);
 113
 114   // function compositions with bind
 115   BOOST_CHECK(bind(sum_of_args_3, bind(sum_of_args_2, _1, 2), 2, 3)(i)==8);
 116   BOOST_CHECK(
 117     bind(sum_of_args_9,
 118        bind(sum_of_args_0),                             // 0
 119        bind(sum_of_args_1, _1),                         // 1
 120        bind(sum_of_args_2, _1, _2),                     // 3
 121        bind(sum_of_args_3, _1, _2, _3),                 // 6
 122        bind(sum_of_args_4, _1, _2, _3, 4),              // 10
 123        bind(sum_of_args_5, _1, _2, _3, 4, 5),           // 15
 124        bind(sum_of_args_6, _1, _2, _3, 4, 5, 6),        // 21
 125        bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7),     // 28
 126        bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)   // 36
 127     )(i, j, k) == 120);
 128
 129   // deeper nesting
 130   result =
 131     bind(sum_of_args_1,                        // 12
 132        bind(sum_of_args_4,                     // 12
 133             bind(sum_of_args_2,                // 3
 134                  bind(sum_of_args_1,           // 1
 135                       bind(sum_of_args_1, _1)  // 1
 136                       ),
 137                  _2),
 138             _2,
 139             _3,
 140             4)
 141      )(i, j, k);
 142    BOOST_CHECK(result == 12);
 143
 144   test_member_functions();
 145
 146
 147   return 0;
 148 }