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 #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_left_shift() 30 { 31 for (std::size_t s = 0; s <= N+1; ++s) 32 { 33 std::bitset<N> v1 = make_bitset<N>(); 34 std::bitset<N> v2 = v1; 35 v1 <<= s; 36 for (std::size_t i = 0; i < N; ++i) 37 if (i < s) 38 assert(v1[i] == 0); 39 else 40 assert(v1[i] == v2[i-s]); 41 } 42 } 43 44 int main() 45 { 46 test_left_shift<0>(); 47 test_left_shift<1>(); 48 test_left_shift<31>(); 49 test_left_shift<32>(); 50 test_left_shift<33>(); 51 test_left_shift<63>(); 52 test_left_shift<64>(); 53 test_left_shift<65>(); 54 test_left_shift<1000>(); 55 } 56
