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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // test bitset<N> operator^(const bitset<N>& lhs, const bitset<N>& rhs);
     11 
     12 #include <bitset>
     13 #include <cstdlib>
     14 #include <cassert>
     15 
     16 #pragma clang diagnostic ignored "-Wtautological-compare"
     17 
     18 template <std::size_t N>
     19 std::bitset<N>
     20 make_bitset()
     21 {
     22     std::bitset<N> v;
     23     for (std::size_t i = 0; i < N; ++i)
     24         v[i] = static_cast<bool>(std::rand() & 1);
     25     return v;
     26 }
     27 
     28 template <std::size_t N>
     29 void test_op_not()
     30 {
     31     std::bitset<N> v1 = make_bitset<N>();
     32     std::bitset<N> v2 = make_bitset<N>();
     33     std::bitset<N> v3 = v1;
     34     assert((v1 ^ v2) == (v3 ^= v2));;
     35 }
     36 
     37 int main()
     38 {
     39     test_op_not<0>();
     40     test_op_not<1>();
     41     test_op_not<31>();
     42     test_op_not<32>();
     43     test_op_not<33>();
     44     test_op_not<63>();
     45     test_op_not<64>();
     46     test_op_not<65>();
     47     test_op_not<1000>();
     48 }
     49