libcxx/test/std/containers/associative/multiset/max_size.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 // <set>
  10
  11 // class multiset
  12
  13 // size_type max_size() const;
  14
  15 #include <cassert>
  16 #include <limits>
  17 #include <set>
  18 #include <type_traits>
  19
  20 #include "test_allocator.h"
  21 #include "test_macros.h"
  22
  23 int main(int, char**)
  24 {
  25     {
  26       typedef limited_allocator<int, 10> A;
  27       typedef std::multiset<int, std::less<int>, A> C;
  28       C c;
  29       assert(c.max_size() <= 10);
  30       LIBCPP_ASSERT(c.max_size() == 10);
  31     }
  32     {
  33       typedef limited_allocator<int, (std::size_t)-1> A;
  34       typedef std::multiset<int, std::less<int>, A> C;
  35       const C::size_type max_dist =
  36           static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
  37       C c;
  38       assert(c.max_size() <= max_dist);
  39       LIBCPP_ASSERT(c.max_size() == max_dist);
  40     }
  41     {
  42       typedef std::multiset<char> C;
  43       const C::size_type max_dist =
  44           static_cast<C::size_type>(std::numeric_limits<C::difference_type>::max());
  45       C c;
  46       assert(c.max_size() <= max_dist);
  47       assert(c.max_size() <= alloc_max_size(c.get_allocator()));
  48     }
  49
  50   return 0;
  51 }