libcxx/test/std/utilities/template.bitset/bitset.cons/ull_ctor.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 // bitset(unsigned long long val); // constexpr since C++23
  10
  11 #include <bitset>
  12 #include <cassert>
  13 #include <algorithm> // for 'min' and 'max'
  14 #include <cstddef>
  15
  16 #include "test_macros.h"
  17
  18 TEST_MSVC_DIAGNOSTIC_IGNORED(6294) // Ill-defined for-loop:  initial condition does not satisfy test.  Loop body not executed.
  19
  20 template <std::size_t N>
  21 TEST_CONSTEXPR_CXX23 void test_val_ctor()
  22 {
  23     {
  24         TEST_CONSTEXPR std::bitset<N> v(0xAAAAAAAAAAAAAAAAULL);
  25         assert(v.size() == N);
  26         std::size_t M = std::min<std::size_t>(v.size(), 64);
  27         for (std::size_t i = 0; i < M; ++i)
  28             assert(v[i] == ((i & 1) != 0));
  29         for (std::size_t i = M; i < v.size(); ++i)
  30             assert(v[i] == false);
  31     }
  32 #if TEST_STD_VER >= 11
  33     {
  34         constexpr std::bitset<N> v(0xAAAAAAAAAAAAAAAAULL);
  35         static_assert(v.size() == N, "");
  36     }
  37 #endif
  38 }
  39
  40 TEST_CONSTEXPR_CXX23 bool test() {
  41   test_val_ctor<0>();
  42   test_val_ctor<1>();
  43   test_val_ctor<31>();
  44   test_val_ctor<32>();
  45   test_val_ctor<33>();
  46   test_val_ctor<63>();
  47   test_val_ctor<64>();
  48   test_val_ctor<65>();
  49   test_val_ctor<1000>();
  50
  51   return true;
  52 }
  53
  54 int main(int, char**)
  55 {
  56   test();
  57 #if TEST_STD_VER > 20
  58   static_assert(test());
  59 #endif
  60
  61   return 0;
  62 }