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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <deque>
     11 
     12 // void push_back(value_type&& v);
     13 // void pop_back();
     14 // void pop_front();
     15 
     16 #include <deque>
     17 #include <cassert>
     18 
     19 #include "../../../MoveOnly.h"
     20 
     21 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     22 
     23 std::deque<MoveOnly>
     24 make(int size, int start = 0 )
     25 {
     26     const int b = 4096 / sizeof(int);
     27     int init = 0;
     28     if (start > 0)
     29     {
     30         init = (start+1) / b + ((start+1) % b != 0);
     31         init *= b;
     32         --init;
     33     }
     34     std::deque<MoveOnly> c(init);
     35     for (int i = 0; i < init-start; ++i)
     36         c.pop_back();
     37     for (int i = 0; i < size; ++i)
     38         c.push_back(MoveOnly(i));
     39     for (int i = 0; i < start; ++i)
     40         c.pop_front();
     41     return c;
     42 };
     43 
     44 void test(int size)
     45 {
     46     int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2046, 2047, 2048, 2049};
     47     const int N = sizeof(rng)/sizeof(rng[0]);
     48     for (int j = 0; j < N; ++j)
     49     {
     50         std::deque<MoveOnly> c = make(size, rng[j]);
     51         std::deque<MoveOnly>::const_iterator it = c.begin();
     52         for (int i = 0; i < size; ++i, ++it)
     53             assert(*it == MoveOnly(i));
     54     }
     55 }
     56 
     57 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     58 
     59 int main()
     60 {
     61 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     62     int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2046, 2047, 2048, 2049, 4094, 4095, 4096};
     63     const int N = sizeof(rng)/sizeof(rng[0]);
     64     for (int j = 0; j < N; ++j)
     65         test(rng[j]);
     66 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     67 }
     68