bc8d3f97eb
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
1 line
1.6 KiB
C++
1 line
1.6 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// test unsigned long to_ulong() const;
|
|
|
|
#include <bitset>
|
|
#include <algorithm>
|
|
#include <climits>
|
|
#include <cassert>
|
|
|
|
template <std::size_t N>
|
|
void test_to_ulong()
|
|
{
|
|
const std::size_t M = sizeof(unsigned long) * CHAR_BIT < N ? sizeof(unsigned long) * CHAR_BIT : N;
|
|
const std::size_t X = M == 0 ? sizeof(unsigned long) * CHAR_BIT - 1 : sizeof(unsigned long) * CHAR_BIT - M;
|
|
const std::size_t max = M == 0 ? 0 : std::size_t(-1) >> X;
|
|
std::size_t tests[] = {0,
|
|
std::min<std::size_t>(1, max),
|
|
std::min<std::size_t>(2, max),
|
|
std::min<std::size_t>(3, max),
|
|
std::min(max, max-3),
|
|
std::min(max, max-2),
|
|
std::min(max, max-1),
|
|
max};
|
|
for (std::size_t i = 0; i < sizeof(tests)/sizeof(tests[0]); ++i)
|
|
{
|
|
std::size_t j = tests[i];
|
|
std::bitset<N> v(j);
|
|
assert(j == v.to_ulong());
|
|
}
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test_to_ulong<0>();
|
|
test_to_ulong<1>();
|
|
test_to_ulong<31>();
|
|
test_to_ulong<32>();
|
|
test_to_ulong<33>();
|
|
test_to_ulong<63>();
|
|
test_to_ulong<64>();
|
|
test_to_ulong<65>();
|
|
test_to_ulong<1000>();
|
|
}
|