--- /dev/null
+// boost/filesystem/directory.hpp ---------------------------------------------------//
+
+// Copyright Beman Dawes 2002-2009
+// Copyright Jan Langer 2002
+// Copyright Dietmar Kuehl 2001
+// Copyright Vladimir Prus 2002
+// Copyright Andrey Semashev 2019
+
+// Distributed under the Boost Software License, Version 1.0.
+// See http://www.boost.org/LICENSE_1_0.txt
+
+// Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------//
+
+#ifndef BOOST_FILESYSTEM3_DIRECTORY_HPP
+#define BOOST_FILESYSTEM3_DIRECTORY_HPP
+
+#include <boost/config.hpp>
+
+# if defined( BOOST_NO_STD_WSTRING )
+# error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <boost/filesystem/config.hpp>
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/file_status.hpp>
+
+#include <string>
+#include <vector>
+#include <utility> // std::move
+
+#include <boost/assert.hpp>
+#include <boost/core/scoped_enum.hpp>
+#include <boost/detail/bitmask.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/smart_ptr/intrusive_ptr.hpp>
+#include <boost/smart_ptr/intrusive_ref_counter.hpp>
+#include <boost/iterator/iterator_facade.hpp>
+#include <boost/iterator/iterator_categories.hpp>
+
+#include <boost/config/abi_prefix.hpp> // must be the last #include
+
+//--------------------------------------------------------------------------------------//
+
+namespace boost {
+namespace filesystem {
+
+//--------------------------------------------------------------------------------------//
+// //
+// directory_entry //
+// //
+//--------------------------------------------------------------------------------------//
+
+// GCC has a problem with a member function named path within a namespace or
+// sub-namespace that also has a class named path. The workaround is to always
+// fully qualify the name path when it refers to the class name.
+
+class directory_entry
+{
+public:
+ typedef boost::filesystem::path::value_type value_type; // enables class path ctor taking directory_entry
+
+ directory_entry() BOOST_NOEXCEPT {}
+ explicit directory_entry(const boost::filesystem::path& p) :
+ m_path(p), m_status(file_status()), m_symlink_status(file_status())
+ {
+ }
+ directory_entry(const boost::filesystem::path& p,
+ file_status st, file_status symlink_st = file_status()) :
+ m_path(p), m_status(st), m_symlink_status(symlink_st)
+ {
+ }
+
+ directory_entry(const directory_entry& rhs) :
+ m_path(rhs.m_path), m_status(rhs.m_status), m_symlink_status(rhs.m_symlink_status)
+ {
+ }
+
+ directory_entry& operator=(const directory_entry& rhs)
+ {
+ m_path = rhs.m_path;
+ m_status = rhs.m_status;
+ m_symlink_status = rhs.m_symlink_status;
+ return *this;
+ }
+
+ // As of October 2015 the interaction between noexcept and =default is so troublesome
+ // for VC++, GCC, and probably other compilers, that =default is not used with noexcept
+ // functions. GCC is not even consistent for the same release on different platforms.
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+ directory_entry(directory_entry&& rhs) BOOST_NOEXCEPT :
+ m_path(std::move(rhs.m_path)), m_status(std::move(rhs.m_status)), m_symlink_status(std::move(rhs.m_symlink_status))
+ {
+ }
+ directory_entry& operator=(directory_entry&& rhs) BOOST_NOEXCEPT
+ {
+ m_path = std::move(rhs.m_path);
+ m_status = std::move(rhs.m_status);
+ m_symlink_status = std::move(rhs.m_symlink_status);
+ return *this;
+ }
+#endif
+
+ void assign(const boost::filesystem::path& p,
+ file_status st = file_status(), file_status symlink_st = file_status())
+ {
+ m_path = p;
+ m_status = st;
+ m_symlink_status = symlink_st;
+ }
+
+ void replace_filename(const boost::filesystem::path& p,
+ file_status st = file_status(), file_status symlink_st = file_status())
+ {
+ m_path.remove_filename();
+ m_path /= p;
+ m_status = st;
+ m_symlink_status = symlink_st;
+ }
+
+# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ void replace_leaf(const boost::filesystem::path& p, file_status st, file_status symlink_st)
+ {
+ replace_filename(p, st, symlink_st);
+ }
+# endif
+
+ const boost::filesystem::path& path() const BOOST_NOEXCEPT { return m_path; }
+ operator const boost::filesystem::path&() const BOOST_NOEXCEPT { return m_path; }
+ file_status status() const { return get_status(); }
+ file_status status(system::error_code& ec) const BOOST_NOEXCEPT { return get_status(&ec); }
+ file_status symlink_status() const { return get_symlink_status(); }
+ file_status symlink_status(system::error_code& ec) const BOOST_NOEXCEPT { return get_symlink_status(&ec); }
+
+ bool operator==(const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path == rhs.m_path; }
+ bool operator!=(const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path != rhs.m_path; }
+ bool operator< (const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path < rhs.m_path; }
+ bool operator<=(const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path <= rhs.m_path; }
+ bool operator> (const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path > rhs.m_path; }
+ bool operator>=(const directory_entry& rhs) const BOOST_NOEXCEPT { return m_path >= rhs.m_path; }
+
+private:
+ BOOST_FILESYSTEM_DECL file_status get_status(system::error_code* ec=0) const;
+ BOOST_FILESYSTEM_DECL file_status get_symlink_status(system::error_code* ec=0) const;
+
+private:
+ boost::filesystem::path m_path;
+ mutable file_status m_status; // stat()-like
+ mutable file_status m_symlink_status; // lstat()-like
+}; // directory_entry
+
+
+//--------------------------------------------------------------------------------------//
+// //
+// directory_entry overloads //
+// //
+//--------------------------------------------------------------------------------------//
+
+// Without these functions, calling (for example) 'is_directory' with a 'directory_entry' results in:
+// - a conversion to 'path' using 'operator const boost::filesystem::path&()',
+// - then a call to 'is_directory(const path& p)' which recomputes the status with 'detail::status(p)'.
+//
+// These functions avoid a costly recomputation of the status if one calls 'is_directory(e)' instead of 'is_directory(e.status)'
+
+inline file_status status (const directory_entry& e) BOOST_NOEXCEPT { return e.status(); }
+inline bool type_present (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::type_present(e.status()); }
+inline bool status_known (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::status_known(e.status()); }
+inline bool exists (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::exists(e.status()); }
+inline bool is_regular_file(const directory_entry& e) BOOST_NOEXCEPT { return filesystem::is_regular_file(e.status()); }
+inline bool is_directory (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::is_directory(e.status()); }
+inline bool is_symlink (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::is_symlink(e.status()); }
+inline bool is_other (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::is_other(e.status()); }
+#ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+inline bool is_regular (const directory_entry& e) BOOST_NOEXCEPT { return filesystem::is_regular(e.status()); }
+#endif
+
+//--------------------------------------------------------------------------------------//
+// //
+// directory_iterator helpers //
+// //
+//--------------------------------------------------------------------------------------//
+
+BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(directory_options, unsigned int)
+{
+ none = 0u,
+ skip_permission_denied = 1u, // if a directory cannot be opened because of insufficient permissions, pretend that the directory is empty
+ follow_directory_symlink = 1u << 1, // recursive_directory_iterator: follow directory symlinks
+ skip_dangling_symlinks = 1u << 2, // non-standard extension for recursive_directory_iterator: don't follow dangling directory symlinks,
+ pop_on_error = 1u << 3, // non-standard extension for recursive_directory_iterator: instead of producing an end iterator on errors,
+ // repeatedly invoke pop() until it succeeds or the iterator becomes equal to end iterator
+ _detail_no_push = 1u << 4 // internal use only
+}
+BOOST_SCOPED_ENUM_DECLARE_END(directory_options)
+
+BOOST_BITMASK(BOOST_SCOPED_ENUM_NATIVE(directory_options))
+
+class directory_iterator;
+
+namespace detail {
+
+BOOST_FILESYSTEM_DECL
+system::error_code dir_itr_close(// never throws()
+ void*& handle
+#if defined(BOOST_POSIX_API)
+ , void*& buffer
+#endif
+) BOOST_NOEXCEPT;
+
+struct dir_itr_imp :
+ public boost::intrusive_ref_counter< dir_itr_imp >
+{
+ directory_entry dir_entry;
+ void* handle;
+
+#if defined(BOOST_POSIX_API)
+ void* buffer; // see dir_itr_increment implementation
+#endif
+
+ dir_itr_imp() BOOST_NOEXCEPT :
+ handle(0)
+#if defined(BOOST_POSIX_API)
+ , buffer(0)
+#endif
+ {
+ }
+
+ ~dir_itr_imp() BOOST_NOEXCEPT
+ {
+ dir_itr_close(handle
+#if defined(BOOST_POSIX_API)
+ , buffer
+#endif
+ );
+ }
+};
+
+// see path::iterator: comment below
+BOOST_FILESYSTEM_DECL void directory_iterator_construct(directory_iterator& it, const path& p, unsigned int opts, system::error_code* ec);
+BOOST_FILESYSTEM_DECL void directory_iterator_increment(directory_iterator& it, system::error_code* ec);
+
+} // namespace detail
+
+//--------------------------------------------------------------------------------------//
+// //
+// directory_iterator //
+// //
+//--------------------------------------------------------------------------------------//
+
+class directory_iterator :
+ public boost::iterator_facade<
+ directory_iterator,
+ directory_entry,
+ boost::single_pass_traversal_tag
+ >
+{
+ friend class boost::iterator_core_access;
+
+ friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_construct(directory_iterator& it, const path& p, unsigned int opts, system::error_code* ec);
+ friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_increment(directory_iterator& it, system::error_code* ec);
+
+public:
+ directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
+
+ // iterator_facade derived classes don't seem to like implementations in
+ // separate translation unit dll's, so forward to detail functions
+ explicit directory_iterator(const path& p, BOOST_SCOPED_ENUM_NATIVE(directory_options) opts = directory_options::none)
+ {
+ detail::directory_iterator_construct(*this, p, static_cast< unsigned int >(opts), 0);
+ }
+
+ directory_iterator(const path& p, system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::directory_iterator_construct(*this, p, static_cast< unsigned int >(directory_options::none), &ec);
+ }
+
+ directory_iterator(const path& p, BOOST_SCOPED_ENUM_NATIVE(directory_options) opts, system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::directory_iterator_construct(*this, p, static_cast< unsigned int >(opts), &ec);
+ }
+
+ BOOST_DEFAULTED_FUNCTION(directory_iterator(directory_iterator const& that), : m_imp(that.m_imp) {})
+ BOOST_DEFAULTED_FUNCTION(directory_iterator& operator= (directory_iterator const& that), { m_imp = that.m_imp; return *this; })
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+ directory_iterator(directory_iterator&& that) BOOST_NOEXCEPT :
+ m_imp(std::move(that.m_imp))
+ {
+ }
+
+ directory_iterator& operator= (directory_iterator&& that) BOOST_NOEXCEPT
+ {
+ m_imp = std::move(that.m_imp);
+ return *this;
+ }
+#endif // !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+
+ directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::directory_iterator_increment(*this, &ec);
+ return *this;
+ }
+
+private:
+ boost::iterator_facade<
+ directory_iterator,
+ directory_entry,
+ boost::single_pass_traversal_tag
+ >::reference dereference() const
+ {
+ BOOST_ASSERT_MSG(!is_end(), "attempt to dereference end directory iterator");
+ return m_imp->dir_entry;
+ }
+
+ void increment() { detail::directory_iterator_increment(*this, 0); }
+
+ bool equal(const directory_iterator& rhs) const BOOST_NOEXCEPT
+ {
+ return m_imp == rhs.m_imp || (is_end() && rhs.is_end());
+ }
+
+ bool is_end() const BOOST_NOEXCEPT
+ {
+ // Note: The check for handle is needed because the iterator can be copied and the copy
+ // can be incremented to end while the original iterator still refers to the same dir_itr_imp.
+ return !m_imp || !m_imp->handle;
+ }
+
+private:
+ // intrusive_ptr provides the shallow-copy semantics required for single pass iterators
+ // (i.e. InputIterators). The end iterator is indicated by is_end().
+ boost::intrusive_ptr< detail::dir_itr_imp > m_imp;
+};
+
+// enable directory_iterator C++11 range-based for statement use --------------------//
+
+// begin() and end() are only used by a range-based for statement in the context of
+// auto - thus the top-level const is stripped - so returning const is harmless and
+// emphasizes begin() is just a pass through.
+inline const directory_iterator& begin(const directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline directory_iterator end(const directory_iterator&) BOOST_NOEXCEPT { return directory_iterator(); }
+
+// enable C++14 generic accessors for range const iterators
+inline const directory_iterator& cbegin(const directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline directory_iterator cend(const directory_iterator&) BOOST_NOEXCEPT { return directory_iterator(); }
+
+// enable directory_iterator BOOST_FOREACH -----------------------------------------//
+
+inline directory_iterator& range_begin(directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline directory_iterator range_begin(const directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline directory_iterator range_end(directory_iterator&) BOOST_NOEXCEPT { return directory_iterator(); }
+inline directory_iterator range_end(const directory_iterator&) BOOST_NOEXCEPT { return directory_iterator(); }
+
+} // namespace filesystem
+
+// namespace boost template specializations
+template<typename C, typename Enabler>
+struct range_mutable_iterator;
+
+template<>
+struct range_mutable_iterator<boost::filesystem::directory_iterator, void>
+{
+ typedef boost::filesystem::directory_iterator type;
+};
+
+template<typename C, typename Enabler>
+struct range_const_iterator;
+
+template<>
+struct range_const_iterator<boost::filesystem::directory_iterator, void>
+{
+ typedef boost::filesystem::directory_iterator type;
+};
+
+namespace filesystem {
+
+//--------------------------------------------------------------------------------------//
+// //
+// recursive_directory_iterator helpers //
+// //
+//--------------------------------------------------------------------------------------//
+
+#if !defined(BOOST_FILESYSTEM_NO_DEPRECATED)
+// Deprecated enum, use directory_options instead
+BOOST_SCOPED_ENUM_UT_DECLARE_BEGIN(symlink_option, unsigned int)
+{
+ none = static_cast< unsigned int >(directory_options::none),
+ no_recurse = none, // don't follow directory symlinks (default behavior)
+ recurse = static_cast< unsigned int >(directory_options::follow_directory_symlink), // follow directory symlinks
+ _detail_no_push = static_cast< unsigned int >(directory_options::_detail_no_push) // internal use only
+}
+BOOST_SCOPED_ENUM_DECLARE_END(symlink_option)
+
+BOOST_BITMASK(BOOST_SCOPED_ENUM_NATIVE(symlink_option))
+#endif // BOOST_FILESYSTEM_NO_DEPRECATED
+
+class recursive_directory_iterator;
+
+namespace detail {
+
+struct recur_dir_itr_imp :
+ public boost::intrusive_ref_counter< recur_dir_itr_imp >
+{
+ typedef directory_iterator element_type;
+ std::vector< element_type > m_stack;
+ // directory_options values, declared as unsigned int for ABI compatibility
+ unsigned int m_options;
+
+ explicit recur_dir_itr_imp(unsigned int opts) BOOST_NOEXCEPT : m_options(opts) {}
+};
+
+BOOST_FILESYSTEM_DECL void recursive_directory_iterator_construct(recursive_directory_iterator& it, const path& dir_path, unsigned int opts, system::error_code* ec);
+BOOST_FILESYSTEM_DECL void recursive_directory_iterator_increment(recursive_directory_iterator& it, system::error_code* ec);
+BOOST_FILESYSTEM_DECL void recursive_directory_iterator_pop(recursive_directory_iterator& it, system::error_code* ec);
+
+} // namespace detail
+
+//--------------------------------------------------------------------------------------//
+// //
+// recursive_directory_iterator //
+// //
+//--------------------------------------------------------------------------------------//
+
+class recursive_directory_iterator :
+ public boost::iterator_facade<
+ recursive_directory_iterator,
+ directory_entry,
+ boost::single_pass_traversal_tag
+ >
+{
+ friend class boost::iterator_core_access;
+
+ friend BOOST_FILESYSTEM_DECL void detail::recursive_directory_iterator_construct(recursive_directory_iterator& it, const path& dir_path, unsigned int opts, system::error_code* ec);
+ friend BOOST_FILESYSTEM_DECL void detail::recursive_directory_iterator_increment(recursive_directory_iterator& it, system::error_code* ec);
+ friend BOOST_FILESYSTEM_DECL void detail::recursive_directory_iterator_pop(recursive_directory_iterator& it, system::error_code* ec);
+
+public:
+ recursive_directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
+
+ explicit recursive_directory_iterator(const path& dir_path)
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(directory_options::none), 0);
+ }
+
+ recursive_directory_iterator(const path& dir_path, system::error_code& ec)
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(directory_options::none), &ec);
+ }
+
+ recursive_directory_iterator(const path& dir_path, BOOST_SCOPED_ENUM_NATIVE(directory_options) opts)
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(opts), 0);
+ }
+
+ recursive_directory_iterator(const path& dir_path, BOOST_SCOPED_ENUM_NATIVE(directory_options) opts, system::error_code& ec)
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(opts), &ec);
+ }
+
+#if !defined(BOOST_FILESYSTEM_NO_DEPRECATED)
+ // Deprecated constructors
+ recursive_directory_iterator(const path& dir_path, BOOST_SCOPED_ENUM_NATIVE(symlink_option) opts)
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(opts), 0);
+ }
+
+ recursive_directory_iterator(const path& dir_path, BOOST_SCOPED_ENUM_NATIVE(symlink_option) opts, system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::recursive_directory_iterator_construct(*this, dir_path, static_cast< unsigned int >(opts), &ec);
+ }
+#endif // BOOST_FILESYSTEM_NO_DEPRECATED
+
+ BOOST_DEFAULTED_FUNCTION(recursive_directory_iterator(recursive_directory_iterator const& that), : m_imp(that.m_imp) {})
+ BOOST_DEFAULTED_FUNCTION(recursive_directory_iterator& operator= (recursive_directory_iterator const& that), { m_imp = that.m_imp; return *this; })
+
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+ recursive_directory_iterator(recursive_directory_iterator&& that) BOOST_NOEXCEPT :
+ m_imp(std::move(that.m_imp))
+ {
+ }
+
+ recursive_directory_iterator& operator= (recursive_directory_iterator&& that) BOOST_NOEXCEPT
+ {
+ m_imp = std::move(that.m_imp);
+ return *this;
+ }
+#endif // !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+
+ recursive_directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::recursive_directory_iterator_increment(*this, &ec);
+ return *this;
+ }
+
+ int depth() const BOOST_NOEXCEPT
+ {
+ BOOST_ASSERT_MSG(!is_end(), "depth() on end recursive_directory_iterator");
+ return static_cast< int >(m_imp->m_stack.size() - 1u);
+ }
+
+ bool recursion_pending() const BOOST_NOEXCEPT
+ {
+ BOOST_ASSERT_MSG(!is_end(), "recursion_pending() on end recursive_directory_iterator");
+ return (m_imp->m_options & static_cast< unsigned int >(directory_options::_detail_no_push)) == 0u;
+ }
+
+#ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ int level() const BOOST_NOEXCEPT { return depth(); }
+ bool no_push_pending() const BOOST_NOEXCEPT { return !recursion_pending(); }
+ bool no_push_request() const BOOST_NOEXCEPT { return !recursion_pending(); }
+#endif
+
+ void pop()
+ {
+ detail::recursive_directory_iterator_pop(*this, 0);
+ }
+
+ void pop(system::error_code& ec) BOOST_NOEXCEPT
+ {
+ detail::recursive_directory_iterator_pop(*this, &ec);
+ }
+
+ void disable_recursion_pending(bool value = true) BOOST_NOEXCEPT
+ {
+ BOOST_ASSERT_MSG(!is_end(), "disable_recursion_pending() on end recursive_directory_iterator");
+ if (value)
+ m_imp->m_options |= static_cast< unsigned int >(directory_options::_detail_no_push);
+ else
+ m_imp->m_options &= ~static_cast< unsigned int >(directory_options::_detail_no_push);
+ }
+
+#ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ void no_push(bool value = true) BOOST_NOEXCEPT { disable_recursion_pending(value); }
+#endif
+
+ file_status status() const
+ {
+ BOOST_ASSERT_MSG(!is_end(), "status() on end recursive_directory_iterator");
+ return m_imp->m_stack.back()->status();
+ }
+
+ file_status symlink_status() const
+ {
+ BOOST_ASSERT_MSG(!is_end(), "symlink_status() on end recursive_directory_iterator");
+ return m_imp->m_stack.back()->symlink_status();
+ }
+
+private:
+ boost::iterator_facade<
+ recursive_directory_iterator,
+ directory_entry,
+ boost::single_pass_traversal_tag
+ >::reference dereference() const
+ {
+ BOOST_ASSERT_MSG(!is_end(), "dereference of end recursive_directory_iterator");
+ return *m_imp->m_stack.back();
+ }
+
+ void increment() { detail::recursive_directory_iterator_increment(*this, 0); }
+
+ bool equal(const recursive_directory_iterator& rhs) const BOOST_NOEXCEPT
+ {
+ return m_imp == rhs.m_imp || (is_end() && rhs.is_end());
+ }
+
+ bool is_end() const BOOST_NOEXCEPT
+ {
+ // Note: The check for m_stack.empty() is needed because the iterator can be copied and the copy
+ // can be incremented to end while the original iterator still refers to the same recur_dir_itr_imp.
+ return !m_imp || m_imp->m_stack.empty();
+ }
+
+private:
+ // intrusive_ptr provides the shallow-copy semantics required for single pass iterators
+ // (i.e. InputIterators). The end iterator is indicated by is_end().
+ boost::intrusive_ptr< detail::recur_dir_itr_imp > m_imp;
+};
+
+#if !defined(BOOST_FILESYSTEM_NO_DEPRECATED)
+typedef recursive_directory_iterator wrecursive_directory_iterator;
+#endif
+
+// enable recursive directory iterator C++11 range-base for statement use ----------//
+
+// begin() and end() are only used by a range-based for statement in the context of
+// auto - thus the top-level const is stripped - so returning const is harmless and
+// emphasizes begin() is just a pass through.
+inline const recursive_directory_iterator& begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline recursive_directory_iterator end(const recursive_directory_iterator&) BOOST_NOEXCEPT { return recursive_directory_iterator(); }
+
+// enable C++14 generic accessors for range const iterators
+inline const recursive_directory_iterator& cbegin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline recursive_directory_iterator cend(const recursive_directory_iterator&) BOOST_NOEXCEPT { return recursive_directory_iterator(); }
+
+// enable recursive directory iterator BOOST_FOREACH -------------------------------//
+
+inline recursive_directory_iterator& range_begin(recursive_directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline recursive_directory_iterator range_begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT { return iter; }
+inline recursive_directory_iterator range_end(recursive_directory_iterator&) BOOST_NOEXCEPT { return recursive_directory_iterator(); }
+inline recursive_directory_iterator range_end(const recursive_directory_iterator&) BOOST_NOEXCEPT { return recursive_directory_iterator(); }
+
+} // namespace filesystem
+
+// namespace boost template specializations
+template<>
+struct range_mutable_iterator<boost::filesystem::recursive_directory_iterator, void>
+{
+ typedef boost::filesystem::recursive_directory_iterator type;
+};
+template<>
+struct range_const_iterator<boost::filesystem::recursive_directory_iterator, void>
+{
+ typedef boost::filesystem::recursive_directory_iterator type;
+};
+
+} // namespace boost
+
+#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+#endif // BOOST_FILESYSTEM3_DIRECTORY_HPP
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