left_shift.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b
1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// test bitset<N> operator<<(size_t pos) const; 11 12#include <bitset> 13#include <cstdlib> 14#include <cassert> 15 16template <std::size_t N> 17std::bitset<N> 18make_bitset() 19{ 20 std::bitset<N> v; 21 for (std::size_t i = 0; i < N; ++i) 22 v[i] = static_cast<bool>(std::rand() & 1); 23 return v; 24} 25 26template <std::size_t N> 27void test_left_shift() 28{ 29 for (std::size_t s = 0; s <= N+1; ++s) 30 { 31 std::bitset<N> v1 = make_bitset<N>(); 32 std::bitset<N> v2 = v1; 33 assert((v1 <<= s) == (v2 << s)); 34 } 35} 36 37int main() 38{ 39 test_left_shift<0>(); 40 test_left_shift<1>(); 41 test_left_shift<31>(); 42 test_left_shift<32>(); 43 test_left_shift<33>(); 44 test_left_shift<63>(); 45 test_left_shift<64>(); 46 test_left_shift<65>(); 47 test_left_shift<1000>(); 48} 49