to_ulong.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c
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 unsigned long to_ulong() const; 11 12#include <bitset> 13#include <algorithm> 14#include <climits> 15#include <cassert> 16 17template <std::size_t N> 18void test_to_ulong() 19{ 20 const std::size_t M = sizeof(unsigned long) * CHAR_BIT < N ? sizeof(unsigned long) * CHAR_BIT : N; 21 const std::size_t X = M == 0 ? sizeof(unsigned long) * CHAR_BIT - 1 : sizeof(unsigned long) * CHAR_BIT - M; 22 const std::size_t max = M == 0 ? 0 : std::size_t(-1) >> X; 23 std::size_t tests[] = {0, 24 std::min<std::size_t>(1, max), 25 std::min<std::size_t>(2, max), 26 std::min<std::size_t>(3, max), 27 std::min(max, max-3), 28 std::min(max, max-2), 29 std::min(max, max-1), 30 max}; 31 for (std::size_t i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i) 32 { 33 std::size_t j = tests[i]; 34 std::bitset<N> v(j); 35 assert(j == v.to_ulong()); 36 } 37} 38 39int main() 40{ 41 test_to_ulong<0>(); 42 test_to_ulong<1>(); 43 test_to_ulong<31>(); 44 test_to_ulong<32>(); 45 test_to_ulong<33>(); 46 test_to_ulong<63>(); 47 test_to_ulong<64>(); 48 test_to_ulong<65>(); 49 test_to_ulong<1000>(); 50} 51