/usr/include/caf/detail/safe_equal.hpp is in libcaf-dev 0.13.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* ____ _ _____ *
* / ___| / \ | ___| C++ *
* | | / _ \ | |_ Actor *
* | |___ / ___ \| _| Framework *
* \____/_/ \_|_| *
* *
* Copyright (C) 2011 - 2015 *
* Dominik Charousset <dominik.charousset (at) haw-hamburg.de> *
* *
* Distributed under the terms and conditions of the BSD 3-Clause License or *
* (at your option) under the terms and conditions of the Boost Software *
* License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE. *
* *
* If you did not receive a copy of the license files, see *
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* http://www.boost.org/LICENSE_1_0.txt. *
******************************************************************************/
#ifndef CAF_DETAIL_SAFE_EQUAL_HPP
#define CAF_DETAIL_SAFE_EQUAL_HPP
#include <cmath> // fabs
#include <limits>
#include <type_traits>
namespace caf {
namespace detail {
/**
* Compares two values by using `operator==` unless two floating
* point numbers are compared. In the latter case, the function
* performs an epsilon comparison.
*/
template <class T, typename U>
typename std::enable_if<
!std::is_floating_point<T>::value && !std::is_floating_point<U>::value,
bool
>::type
safe_equal(const T& lhs, const U& rhs) {
return lhs == rhs;
}
template <class T, typename U>
typename std::enable_if<
std::is_floating_point<T>::value || std::is_floating_point<U>::value,
bool
>::type
safe_equal(const T& lhs, const U& rhs) {
using res_type = decltype(lhs - rhs);
return std::fabs(lhs - rhs) <= std::numeric_limits<res_type>::epsilon();
}
} // namespace detail
} // namespace caf
#endif // CAF_DETAIL_SAFE_EQUAL_HPP
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