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 #include "test_macros.h" 17 18 #if defined(TEST_COMPILER_CLANG) 19 #pragma clang diagnostic ignored "-Wtautological-compare" 20 #elif defined(TEST_COMPILER_C1XX) 21 #pragma warning(disable: 6294) // Ill-defined for-loop: initial condition does not satisfy test. Loop body not executed. 22 #endif 23 24 template <std::size_t N> 25 std::bitset<N> 26 make_bitset() 27 { 28 std::bitset<N> v; 29 for (std::size_t i = 0; i < N; ++i) 30 v[i] = static_cast<bool>(std::rand() & 1); 31 return v; 32 } 33 34 template <std::size_t N> 35 void test_count() 36 { 37 const std::bitset<N> v = make_bitset<N>(); 38 std::size_t c1 = v.count(); 39 std::size_t c2 = 0; 40 for (std::size_t i = 0; i < N; ++i) 41 if (v[i]) 42 ++c2; 43 assert(c1 == c2); 44 } 45 46 int main() 47 { 48 test_count<0>(); 49 test_count<1>(); 50 test_count<31>(); 51 test_count<32>(); 52 test_count<33>(); 53 test_count<63>(); 54 test_count<64>(); 55 test_count<65>(); 56 test_count<1000>(); 57 } 58
