| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include <limits> |
| #include <sstream> |
| #include <iostream> |
| #include <cassert> |
| #include <iostream> |
| |
| using namespace std; |
| |
| template <class T> |
| bool check_stream_failed(std::string const& val) { |
| istringstream ss(val); |
| T result; |
| return !(ss >> result); |
| } |
| |
| template<typename T> |
| void check_limits() |
| { |
| const bool is_unsigned = std::is_unsigned<T>::value; |
| T minv = numeric_limits<T>::min(); |
| T maxv = numeric_limits<T>::max(); |
| |
| ostringstream miniss, maxiss; |
| assert(miniss << minv); |
| assert(maxiss << maxv); |
| std::string mins = miniss.str(); |
| std::string maxs = maxiss.str(); |
| |
| istringstream maxoss(maxs), minoss(mins); |
| |
| T new_minv, new_maxv; |
| assert(maxoss >> new_maxv); |
| assert(minoss >> new_minv); |
| |
| assert(new_minv == minv); |
| assert(new_maxv == maxv); |
| |
| maxs[maxs.size() - 1]++; |
| assert(check_stream_failed<T>(maxs)); |
| if (!is_unsigned) { |
| mins[mins.size() - 1]++; |
| assert(check_stream_failed<T>(mins)); |
| } |
| } |
| |
| int main(void) |
| { |
| check_limits<short>(); |
| check_limits<unsigned short>(); |
| check_limits<int>(); |
| check_limits<unsigned int>(); |
| check_limits<long>(); |
| check_limits<unsigned long>(); |
| check_limits<long long>(); |
| check_limits<unsigned long long>(); |
| } |