/usr/include/range/v3/utility/unreachable.hpp is in librange-v3-dev 0.3.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | /// \file
// Range v3 library
//
// Copyright Eric Niebler 2014-present
//
// Use, modification and distribution is subject to the
// Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Project home: https://github.com/ericniebler/range-v3
//
#ifndef RANGES_V3_UTILITY_UNREACHABLE_HPP
#define RANGES_V3_UTILITY_UNREACHABLE_HPP
#include <meta/meta.hpp>
#include <range/v3/range_fwd.hpp>
#include <range/v3/utility/concepts.hpp>
namespace ranges
{
inline namespace v3
{
/// \addtogroup group-utility
/// @{
struct unreachable
{
template<typename T>
friend constexpr bool operator==(T const &, unreachable)
{
return false;
}
template<typename T>
friend constexpr bool operator==(unreachable, T const &)
{
return false;
}
template<typename T>
friend constexpr bool operator!=(T const &, unreachable)
{
return true;
}
template<typename T>
friend constexpr bool operator!=(unreachable, T const &)
{
return true;
}
};
/// @}
}
}
#endif
|