libcxx/test/std/utilities/template.bitset/bitset.members/none.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 // test bool none() const;
  10
  11 #include <bitset>
  12 #include <cassert>
  13 #include <cstddef>
  14
  15 #include "test_macros.h"
  16
  17 template <std::size_t N>
  18 void test_none() {
  19     std::bitset<N> v;
  20     v.reset();
  21     assert(v.none() == true);
  22     v.set();
  23     assert(v.none() == (N == 0));
  24     if (v.size() > 1) {
  25         v[N/2] = false;
  26         assert(v.none() == false);
  27         v.reset();
  28         v[N/2] = true;
  29         assert(v.none() == false);
  30     }
  31 }
  32
  33 int main(int, char**) {
  34     test_none<0>();
  35     test_none<1>();
  36     test_none<31>();
  37     test_none<32>();
  38     test_none<33>();
  39     test_none<63>();
  40     test_none<64>();
  41     test_none<65>();
  42     test_none<1000>();
  43
  44     return 0;
  45 }