genericopenlibs/cppstdlib/stl/test/unit/uninitialized_test.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 02:01:42 +0200
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#include <memory>
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#include <vector>
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#include <list>
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#include "cppunit/cppunit_proxy.h"
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#if !defined (STLPORT) || defined(_STLP_USE_NAMESPACES)
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using namespace std;
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#endif
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//
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// TestCase class
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//
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class UninitializedTest : public CPPUNIT_NS::TestCase
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{
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  CPPUNIT_TEST_SUITE(UninitializedTest);
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  CPPUNIT_TEST(copy_test);
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  //CPPUNIT_TEST(fill_test);
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  //CPPUNIT_TEST(fill_n_test);
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  CPPUNIT_TEST_SUITE_END();
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protected:
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  void copy_test();
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  void fill_test();
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  void fill_n_test();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(UninitializedTest);
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struct NotTrivialCopyStruct {
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  NotTrivialCopyStruct() : member(0) {}
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  NotTrivialCopyStruct(NotTrivialCopyStruct const&) : member(1) {}
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  int member;
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};
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struct TrivialCopyStruct {
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  TrivialCopyStruct() : member(0) {}
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  TrivialCopyStruct(TrivialCopyStruct const&) : member(1) {}
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  int member;
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};
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struct TrivialInitStruct {
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  TrivialInitStruct()
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  { ++nbConstructorCalls; }
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  static size_t nbConstructorCalls;
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};
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size_t TrivialInitStruct::nbConstructorCalls = 0;
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#if defined (STLPORT)
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namespace std
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{
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  _STLP_TEMPLATE_NULL
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  struct __type_traits<TrivialCopyStruct> {
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     typedef __false_type has_trivial_default_constructor;
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     //This is a wrong declaration just to check that internaly a simple memcpy is called:
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     typedef __true_type has_trivial_copy_constructor;
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     typedef __true_type has_trivial_assignment_operator;
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     typedef __true_type has_trivial_destructor;
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     typedef __false_type is_POD_type;
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  };
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  _STLP_TEMPLATE_NULL
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  struct __type_traits<TrivialInitStruct> {
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     //This is a wrong declaration just to check that internaly no initialization is done:
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     typedef __true_type has_trivial_default_constructor;
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     typedef __true_type has_trivial_copy_constructor;
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     typedef __true_type has_trivial_assignment_operator;
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     typedef __true_type has_trivial_destructor;
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     typedef __false_type is_POD_type;
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  };
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}
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#endif
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struct base {};
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struct derived : public base {};
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//
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// tests implementation
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//
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void UninitializedTest::copy_test()
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{
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  {
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    //Random iterators
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    {
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      vector<NotTrivialCopyStruct> src(10);
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      vector<NotTrivialCopyStruct> dst(10);
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      uninitialized_copy(src.begin(), src.end(), dst.begin());
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      vector<NotTrivialCopyStruct>::const_iterator it(dst.begin()), end(dst.end());
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      for (; it != end; ++it) {
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        CPPUNIT_ASSERT( (*it).member == 1 );
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      }
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    }
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    {
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      /** Note: we use static arrays here so the iterators are always
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      pointers, even in debug mode. */
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      size_t const count = 10;
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      TrivialCopyStruct src[count];
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      TrivialCopyStruct dst[count];
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      TrivialCopyStruct* it = src + 0;
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      TrivialCopyStruct* end = src + count;
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      for (; it != end; ++it) {
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        (*it).member = 0;
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      }
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      uninitialized_copy(src+0, src+count, dst+0);
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      for (it = dst+0, end = dst+count; it != end; ++it) {
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#if defined (STLPORT)
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        /* If the member is 1, it means that library has not found any
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        optimization oportunity and called the regular copy-ctor instead. */
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        CPPUNIT_ASSERT( (*it).member == 0 );
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#else
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        CPPUNIT_ASSERT( (*it).member == 1 );
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#endif
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      }
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    }
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  }
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   122
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  {
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   124
    //Bidirectional iterator
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   125
    {
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      vector<NotTrivialCopyStruct> src(10);
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      list<NotTrivialCopyStruct> dst(10);
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   128
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      list<NotTrivialCopyStruct>::iterator it(dst.begin()), end(dst.end());
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   130
      for (; it != end; ++it) {
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        (*it).member = -1;
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      }
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   133
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   134
      uninitialized_copy(src.begin(), src.end(), dst.begin());
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   135
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   136
      for (it = dst.begin(); it != end; ++it) {
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        CPPUNIT_ASSERT( (*it).member == 1 );
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   138
      }
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    }
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   140
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   141
    {
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   142
      list<NotTrivialCopyStruct> src(10);
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   143
      vector<NotTrivialCopyStruct> dst(10);
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   144
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   145
      vector<NotTrivialCopyStruct>::iterator it(dst.begin()), end(dst.end());
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   146
      for (; it != end; ++it) {
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        (*it).member = -1;
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   148
      }
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   149
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      uninitialized_copy(src.begin(), src.end(), dst.begin());
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   151
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   152
      for (it = dst.begin(); it != end; ++it) {
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   153
        CPPUNIT_ASSERT( (*it).member == 1 );
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   154
      }
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   155
    }
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   156
  }
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   157
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  {
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   159
    //Using containers of native types:
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   160
#if !defined (STLPORT) || !defined (_STLP_NO_MEMBER_TEMPLATES)
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   161
    {
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      vector<int> src;
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      int i;
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   164
      for (i = -5; i < 6; ++i) {
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        src.push_back(i);
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   166
      }
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   167
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      //Building a vector result in a uninitialized_copy call internally
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      vector<unsigned int> dst(src.begin(), src.end());
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      vector<unsigned int>::const_iterator it(dst.begin());
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   171
      for (i = -5; i < 6; ++i, ++it) {
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        CPPUNIT_ASSERT( *it == (unsigned int)i );
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   173
      }
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   174
    }
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   175
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   176
    {
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      vector<char> src;
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      char i;
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   179
      for (i = -5; i < 6; ++i) {
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        src.push_back(i);
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   181
      }
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   182
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   183
      //Building a vector result in a uninitialized_copy call internally
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      vector<unsigned int> dst(src.begin(), src.end());
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      vector<unsigned int>::const_iterator it(dst.begin());
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   186
      for (i = -5; i < 6; ++i, ++it) {
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   187
        CPPUNIT_ASSERT( *it == (unsigned int)i );
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   188
      }
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   189
    }
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   190
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   191
    {
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      vector<int> src;
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   193
      int i;
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   194
      for (i = -5; i < 6; ++i) {
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   195
        src.push_back(i);
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   196
      }
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   197
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   198
      //Building a vector result in a uninitialized_copy call internally
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   199
      vector<float> dst(src.begin(), src.end());
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      vector<float>::const_iterator it(dst.begin());
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   201
      for (i = -5; i < 6; ++i, ++it) {
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   202
        CPPUNIT_ASSERT( *it == (float)i );
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   203
      }
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   204
    }
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   205
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   206
    {
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   207
      vector<vector<float>*> src(10);
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   208
      vector<vector<float>*> dst(src.begin(), src.end());
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   209
    }
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   210
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   211
    {
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   212
      derived d;
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   213
      //base *pb = &d;
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   214
      derived *pd = &d;
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   215
      //base **ppb = &pd;
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   216
      vector<derived*> src(10, pd);
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   217
      vector<base*> dst(src.begin(), src.end());
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   218
      vector<base*>::iterator it(dst.begin()), end(dst.end());
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   219
      for (; it != end; ++it) {
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   220
        CPPUNIT_ASSERT( (*it) == pd );
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   221
      }
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   222
    }
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   223
#endif
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   224
  }
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   225
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   226
  {
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   227
    //Vector initialization:
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   228
    vector<TrivialInitStruct> vect(10);
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   229
    //Just 1 constructor call for the default value:
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    CPPUNIT_ASSERT( TrivialInitStruct::nbConstructorCalls == 1  );
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  }
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}
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/*
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void UninitializedTest::fill_test()
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{
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}
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void UninitializedTest::fill_n_test()
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{
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}
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*/