/usr/include/range/v3/getlines.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.
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// Range v3 library
//
// Copyright Eric Niebler 2013-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_GETLINES_HPP
#define RANGES_V3_GETLINES_HPP
#include <string>
#include <istream>
#include <range/v3/range_fwd.hpp>
#include <range/v3/view_facade.hpp>
#include <range/v3/utility/static_const.hpp>
namespace ranges
{
inline namespace v3
{
/// \addtogroup group-core
/// @{
struct getlines_range
: view_facade<getlines_range, unknown>
{
private:
friend range_access;
std::istream *sin_;
std::string str_;
char delim_;
struct cursor
{
private:
getlines_range *rng_;
public:
cursor() = default;
explicit cursor(getlines_range &rng)
: rng_(&rng)
{}
void next()
{
rng_->next();
}
std::string &read() const noexcept
{
return rng_->str_;
}
bool equal(default_sentinel) const
{
return !*rng_->sin_;
}
};
void next()
{
std::getline(*sin_, str_, delim_);
}
cursor begin_cursor()
{
return cursor{*this};
}
public:
getlines_range() = default;
getlines_range(std::istream &sin, char delim = '\n')
: sin_(&sin), str_{}, delim_(delim)
{
this->next(); // prime the pump
}
std::string & cached() noexcept
{
return str_;
}
};
struct getlines_fn
{
getlines_range operator()(std::istream & sin, char delim = '\n') const
{
return getlines_range{sin, delim};
}
};
RANGES_INLINE_VARIABLE(getlines_fn, getlines)
/// @}
}
}
#endif
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