libcxx/test/std/utilities/template.bitset/bitset.members/op_or_eq.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 // ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=15000000
  10
  11 // bitset<N>& operator|=(const bitset<N>& rhs); // constexpr since C++23
  12
  13 #include <bitset>
  14 #include <cassert>
  15 #include <cstddef>
  16 #include <vector>
  17
  18 #include "../bitset_test_cases.h"
  19 #include "test_macros.h"
  20
  21 template <std::size_t N>
  22 TEST_CONSTEXPR_CXX23 void test_op_or_eq() {
  23     std::vector<std::bitset<N> > const cases = get_test_cases<N>();
  24     for (std::size_t c1 = 0; c1 != cases.size(); ++c1) {
  25         for (std::size_t c2 = 0; c2 != cases.size(); ++c2) {
  26             std::bitset<N> v1 = cases[c1];
  27             std::bitset<N> v2 = cases[c2];
  28             std::bitset<N> v3 = v1;
  29             v1 |= v2;
  30             for (std::size_t i = 0; i < v1.size(); ++i)
  31                 assert(v1[i] == (v3[i] || v2[i]));
  32         }
  33     }
  34 }
  35
  36 TEST_CONSTEXPR_CXX23 bool test() {
  37   test_op_or_eq<0>();
  38   test_op_or_eq<1>();
  39   test_op_or_eq<31>();
  40   test_op_or_eq<32>();
  41   test_op_or_eq<33>();
  42   test_op_or_eq<63>();
  43   test_op_or_eq<64>();
  44   test_op_or_eq<65>();
  45
  46   return true;
  47 }
  48
  49 int main(int, char**) {
  50   test();
  51   test_op_or_eq<1000>(); // not in constexpr because of constexpr evaluation step limits
  52 #if TEST_STD_VER > 20
  53   static_assert(test());
  54 #endif
  55
  56   return 0;
  57 }