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 size_t count() const; 11 12 #include <bitset> 13 #include <cstdlib> 14 #include <cassert> 15 16 #if defined(__clang__) 17 #pragma clang diagnostic ignored "-Wtautological-compare" 18 #endif 19 20 template <std::size_t N> 21 std::bitset<N> make_bitset()22make_bitset() 23 { 24 std::bitset<N> v; 25 for (std::size_t i = 0; i < N; ++i) 26 v[i] = static_cast<bool>(std::rand() & 1); 27 return v; 28 } 29 30 template <std::size_t N> test_count()31void test_count() 32 { 33 const std::bitset<N> v = make_bitset<N>(); 34 std::size_t c1 = v.count(); 35 std::size_t c2 = 0; 36 for (std::size_t i = 0; i < N; ++i) 37 if (v[i]) 38 ++c2; 39 assert(c1 == c2); 40 } 41 main()42int main() 43 { 44 test_count<0>(); 45 test_count<1>(); 46 test_count<31>(); 47 test_count<32>(); 48 test_count<33>(); 49 test_count<63>(); 50 test_count<64>(); 51 test_count<65>(); 52 test_count<1000>(); 53 } 54