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<<=(size_t pos); 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> 22 make_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> 31 void test_left_shift() 32 { 33 for (std::size_t s = 0; s <= N+1; ++s) 34 { 35 std::bitset<N> v1 = make_bitset<N>(); 36 std::bitset<N> v2 = v1; 37 v1 <<= s; 38 for (std::size_t i = 0; i < N; ++i) 39 if (i < s) 40 assert(v1[i] == 0); 41 else 42 assert(v1[i] == v2[i-s]); 43 } 44 } 45 46 int main() 47 { 48 test_left_shift<0>(); 49 test_left_shift<1>(); 50 test_left_shift<31>(); 51 test_left_shift<32>(); 52 test_left_shift<33>(); 53 test_left_shift<63>(); 54 test_left_shift<64>(); 55 test_left_shift<65>(); 56 test_left_shift<1000>(); 57 } 58
