libcxx/test/std/utilities/template.bitset/bitset.members/any.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 // bool any() const; // constexpr since C++23
  10
  11 #include <bitset>
  12 #include <cassert>
  13 #include <cstddef>
  14
  15 #include "test_macros.h"
  16
  17 template <std::size_t N>
  18 TEST_CONSTEXPR_CXX23 void test_any() {
  19     std::bitset<N> v;
  20     v.reset();
  21     assert(v.any() == false);
  22     v.set();
  23     assert(v.any() == (N != 0));
  24     if (v.size() > 1) {
  25         v[N/2] = false;
  26         assert(v.any() == true);
  27         v.reset();
  28         v[N/2] = true;
  29         assert(v.any() == true);
  30     }
  31 }
  32
  33 TEST_CONSTEXPR_CXX23 bool test() {
  34   test_any<0>();
  35   test_any<1>();
  36   test_any<31>();
  37   test_any<32>();
  38   test_any<33>();
  39   test_any<63>();
  40   test_any<64>();
  41   test_any<65>();
  42   test_any<1000>();
  43
  44   return true;
  45 }
  46
  47 int main(int, char**) {
  48   test();
  49 #if TEST_STD_VER > 20
  50   static_assert(test());
  51 #endif
  52
  53   return 0;
  54 }