1 // Copyright 2018-2019 Antony Polukhin.
2 //
3 // Distributed under the Boost Software License, Version 1.0.
4 // (See accompanying file LICENSE_1_0.txt
5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
6 
7 /// \file boost/dll/config.hpp
8 /// \brief Imports filesystem, error_code, errc, system_error, make_error_code from Boost or C++17 into `boost::dll::fs` namespace.
9 
10 #ifndef BOOST_DLL_DETAIL_CONFIG_HPP
11 #define BOOST_DLL_DETAIL_CONFIG_HPP
12 
13 #include <boost/config.hpp>
14 #ifdef BOOST_HAS_PRAGMA_ONCE
15 #   pragma once
16 #endif
17 
18 #ifdef BOOST_DLL_DOXYGEN
19 /// Define this macro to make Boost.DLL use C++17's std::filesystem::path, std::system_error and std::error_code.
20 #define BOOST_DLL_USE_STD_FS BOOST_DLL_USE_STD_FS
21 
22 /// This namespace contains aliases to the Boost or C++17 classes. Aliases are configured using BOOST_DLL_USE_STD_FS macro.
23 namespace boost { namespace dll { namespace fs {
24 
25 /// Alias to `std::filesystem::path` if \forcedmacrolink{BOOST_DLL_USE_STD_FS} is defined by user.
26 /// Alias to `boost::filesystem::path` otherwise.
27 using path = std::conditional_t<BOOST_DLL_USE_STD_FS, std::filesystem::path, boost::filesystem::path>;
28 
29 /// Alias to `std::error_code` if \forcedmacrolink{BOOST_DLL_USE_STD_FS} is defined by user.
30 /// boost::system::error_code otherwise.
31 using error_code = std::conditional_t<BOOST_DLL_USE_STD_FS, std::error_code, boost::system::error_code>;
32 
33 /// Alias to `std::system_error` if \forcedmacrolink{BOOST_DLL_USE_STD_FS} is defined by user.
34 /// Alias to `boost::system::system_error` otherwise.
35 using system_error = std::conditional_t<BOOST_DLL_USE_STD_FS, std::system_error, boost::system::system_error>;
36 
37 }}}
38 
39 #endif
40 
41 #ifdef BOOST_DLL_USE_STD_FS
42 #include <filesystem>
43 #include <system_error>
44 
45 namespace boost { namespace dll { namespace fs {
46 
47 using namespace std::filesystem;
48 
49 using std::error_code;
50 using std::system_error;
51 using std::make_error_code;
52 using std::errc;
53 using std::system_category;
54 
55 }}}
56 
57 #else // BOOST_DLL_USE_STD_FS
58 
59 #include <boost/filesystem/path.hpp>
60 #include <boost/filesystem/operations.hpp>
61 #include <boost/system/error_code.hpp>
62 
63 namespace boost { namespace dll { namespace fs {
64 
65 using namespace boost::filesystem;
66 
67 using boost::system::error_code;
68 using boost::system::system_error;
69 using boost::system::errc::make_error_code;
70 namespace errc = boost::system::errc;
71 using boost::system::system_category;
72 
73 }}}
74 
75 #endif // BOOST_DLL_USE_STD_FS
76 
77 #endif // BOOST_DLL_DETAIL_PUSH_OPTIONS_HPP
78 
79