libcxx/test/std/containers/sequences/vector/contiguous.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <vector>
  10
  11 // An vector is a contiguous container
  12
  13 #include <vector>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17 #include "test_allocator.h"
  18 #include "min_allocator.h"
  19
  20 template <class C>
  21 TEST_CONSTEXPR_CXX20 void test_contiguous(const C &c)
  22 {
  23     for ( std::size_t i = 0; i < c.size(); ++i )
  24         assert ( *(c.begin() + static_cast<typename C::difference_type>(i)) == *(std::addressof(*c.begin()) + i));
  25 }
  26
  27 TEST_CONSTEXPR_CXX20 bool tests()
  28 {
  29     {
  30     typedef int T;
  31     typedef std::vector<T> C;
  32     test_contiguous(C());
  33     test_contiguous(C(3, 5));
  34     }
  35
  36     {
  37     typedef double T;
  38     typedef test_allocator<T> A;
  39     typedef std::vector<T, A> C;
  40     test_contiguous(C(A(3)));
  41     test_contiguous(C(7, 9.0, A(5)));
  42     }
  43 #if TEST_STD_VER >= 11
  44     {
  45     typedef double T;
  46     typedef min_allocator<T> A;
  47     typedef std::vector<T, A> C;
  48     test_contiguous(C(A{}));
  49     test_contiguous(C(9, 11.0, A{}));
  50     }
  51     {
  52       typedef double T;
  53       typedef safe_allocator<T> A;
  54       typedef std::vector<T, A> C;
  55       test_contiguous(C(A{}));
  56       test_contiguous(C(9, 11.0, A{}));
  57     }
  58 #endif
  59
  60     return true;
  61 }
  62
  63 int main(int, char**)
  64 {
  65     tests();
  66 #if TEST_STD_VER > 17
  67     static_assert(tests());
  68 #endif
  69     return 0;
  70 }