FM / core

/usr/include/boost/beast/core

Name	Size	Mode	Actions
detail/	-	0755	rm
impl/	-	0755	rm
async_base.hpp	26461	0644	edit dl rm
basic_stream.hpp	55342	0644	edit dl rm
bind_handler.hpp	4172	0644	edit dl rm
buffered_read_stream.hpp	11877	0644	edit dl rm
buffers_adaptor.hpp	6783	0644	edit dl rm
buffers_cat.hpp	3383	0644	edit dl rm
buffers_prefix.hpp	6152	0644	edit dl rm
buffers_range.hpp	4211	0644	edit dl rm
buffers_suffix.hpp	3971	0644	edit dl rm
buffers_to_string.hpp	1770	0644	edit dl rm
buffer_traits.hpp	5757	0644	edit dl rm
detect_ssl.hpp	22345	0644	edit dl rm
error.hpp	2257	0644	edit dl rm
file.hpp	1028	0644	edit dl rm
file_base.hpp	5015	0644	edit dl rm
file_posix.hpp	4222	0644	edit dl rm
file_stdio.hpp	3849	0644	edit dl rm
file_win32.hpp	4248	0644	edit dl rm
flat_buffer.hpp	15427	0644	edit dl rm
flat_static_buffer.hpp	8706	0644	edit dl rm
flat_stream.hpp	12603	0644	edit dl rm
make_printable.hpp	2803	0644	edit dl rm
multi_buffer.hpp	18153	0644	edit dl rm
ostream.hpp	2690	0644	edit dl rm
rate_policy.hpp	4592	0644	edit dl rm
read_size.hpp	1844	0644	edit dl rm
role.hpp	1322	0644	edit dl rm
saved_handler.hpp	3788	0644	edit dl rm
span.hpp	4787	0644	edit dl rm
static_buffer.hpp	8515	0644	edit dl rm
static_string.hpp	25720	0644	edit dl rm
stream_traits.hpp	16399	0644	edit dl rm
string.hpp	1941	0644	edit dl rm
string_param.hpp	3459	0644	edit dl rm
string_type.hpp	1092	0644	edit dl rm
tcp_stream.hpp	853	0644	edit dl rm

Edit: /usr/include/boost/beast/core/file_base.hpp (5015B)

//
// Copyright (c) 2015-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under 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)
//
// Official repository: https://github.com/boostorg/beast
//

#ifndef BOOST_BEAST_CORE_FILE_BASE_HPP
#define BOOST_BEAST_CORE_FILE_BASE_HPP

#include <boost/beast/core/detail/config.hpp>
#include <boost/beast/core/error.hpp>
#include <boost/type_traits/make_void.hpp>
#include <type_traits>

namespace boost {
namespace beast {

file_mode           acesss          sharing     seeking     file              std mode
--------------------------------------------------------------------------------------
read                read-only       shared      random      must exist          "rb"
scan                read-only       shared      sequential  must exist          "rbS"
write               read/write      exclusive   random      create/truncate     "wb+"
write_new           read/write      exclusive   random      must not exist      "wbx"
write_existing      read/write      exclusive   random      must exist          "rb+"
append              write-only      exclusive   sequential  create/truncate     "ab"
append_existing     write-only      exclusive   sequential  must exist          "ab"

/** File open modes

These modes are used when opening files using
    instances of the <em>File</em> concept.

@see file_stdio
*/
enum class file_mode
{
    /// Random read-only access to an existing file
    read,

/// Sequential read-only access to an existing file
    scan,

/** Random reading and writing to a new or truncated file

This mode permits random-access reading and writing
        for the specified file. If the file does not exist
        prior to the function call, it is created with an
        initial size of zero bytes. Otherwise if the file
        already exists, the size is truncated to zero bytes.
    */
    write,

/** Random reading and writing to a new file only

This mode permits random-access reading and writing
        for the specified file. The file will be created with
        an initial size of zero bytes. If the file already exists
        prior to the function call, an error is returned and
        no file is opened.
    */
    write_new,

/** Random write-only access to existing file

If the file does not exist, an error is generated.
    */
    write_existing,

/** Appending to a new or truncated file

The current file position shall be set to the end of
        the file prior to each write.

@li If the file does not exist, it is created.

@li If the file exists, it is truncated to
        zero size upon opening.
    */
    append,

/** Appending to an existing file

The current file position shall be set to the end of
        the file prior to each write.

If the file does not exist, an error is generated.
    */
    append_existing
};

/** Determine if `T` meets the requirements of <em>File</em>.

Metafunctions are used to perform compile time checking of template
    types. This type will be `std::true_type` if `T` meets the requirements,
    else the type will be `std::false_type`.

@par Example

Use with `static_assert`:

@code
    template<class File>
    void f(File& file)
    {
        static_assert(is_file<File>::value,
            "File type requirements not met");
    ...
    @endcode

Use with `std::enable_if` (SFINAE):

@code
    template<class File>
    typename std::enable_if<is_file<File>::value>::type
    f(File& file);
    @endcode
*/
#if BOOST_BEAST_DOXYGEN
template<class T>
struct is_file : std::integral_constant<bool, ...>{};
#else
template<class T, class = void>
struct is_file : std::false_type {};

template<class T>
struct is_file<T, boost::void_t<decltype(
    std::declval<bool&>() = std::declval<T const&>().is_open(),
    std::declval<T&>().close(std::declval<error_code&>()),
    std::declval<T&>().open(
        std::declval<char const*>(),
        std::declval<file_mode>(),
        std::declval<error_code&>()),
    std::declval<std::uint64_t&>() = std::declval<T&>().size(
        std::declval<error_code&>()),
    std::declval<std::uint64_t&>() = std::declval<T&>().pos(
        std::declval<error_code&>()),
    std::declval<T&>().seek(
        std::declval<std::uint64_t>(),
        std::declval<error_code&>()),
    std::declval<std::size_t&>() = std::declval<T&>().read(
        std::declval<void*>(),
        std::declval<std::size_t>(),
        std::declval<error_code&>()),
    std::declval<std::size_t&>() = std::declval<T&>().write(
        std::declval<void const*>(),
        std::declval<std::size_t>(),
        std::declval<error_code&>())
            )>> : std::integral_constant<bool,
    std::is_default_constructible<T>::value &&
    std::is_destructible<T>::value
        > {};
#endif

} // beast
} // boost

#endif

cmd: