Generic Image Library: get_read_device.hpp Source File

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get_read_device.hpp
1//
2// Copyright 2012 Christian Henning
3//
4// Distributed under the Boost Software License, Version 1.0
5// See accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt
7//
8#ifndef BOOST_GIL_IO_GET_READ_DEVICE_HPP
9#define BOOST_GIL_IO_GET_READ_DEVICE_HPP
10
11#include <boost/gil/detail/mp11.hpp>
12#include <boost/gil/io/device.hpp>
13#include <boost/gil/io/path_spec.hpp>
14
15#include <type_traits>
16
17namespace boost { namespace gil {
18
19template< typename T
20 , typename FormatTag
21 , class Enable = void
22 >
23struct get_read_device
24{};
25
26template <typename Device, typename FormatTag>
27struct get_read_device
28<
29 Device,
30 FormatTag,
31 typename std::enable_if
32 <
33 mp11::mp_and
34 <
35 detail::is_adaptable_input_device<FormatTag, Device>,
36 is_format_tag<FormatTag>
37 >::value
38 >::type
39>
40{
41 using type = typename detail::is_adaptable_input_device
42 <
43 FormatTag,
44 Device
45 >::device_type;
46};
47
48template <typename String, typename FormatTag>
49struct get_read_device
50<
51 String,
52 FormatTag,
53 typename std::enable_if
54 <
55 mp11::mp_and
56 <
57 detail::is_supported_path_spec<String>,
58 is_format_tag<FormatTag>
59 >::value
60 >::type
61>
62{
63 using type = detail::file_stream_device<FormatTag>;
64};
65
66} // namespace gil
67} // namespace boost
68
69#endif
boost
defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)
Definition algorithm.hpp:36