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 #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_right_shift() 36 { 37 for (std::size_t s = 0; s <= N+1; ++s) 38 { 39 std::bitset<N> v1 = make_bitset<N>(); 40 std::bitset<N> v2 = v1; 41 v1 >>= s; 42 for (std::size_t i = 0; i < N; ++i) 43 if (i + s < N) 44 assert(v1[i] == v2[i + s]); 45 else 46 assert(v1[i] == 0); 47 } 48 } 49 50 int main() 51 { 52 test_right_shift<0>(); 53 test_right_shift<1>(); 54 test_right_shift<31>(); 55 test_right_shift<32>(); 56 test_right_shift<33>(); 57 test_right_shift<63>(); 58 test_right_shift<64>(); 59 test_right_shift<65>(); 60 test_right_shift<1000>(); 61 } 62
