LWG2707 init filesystem::path from string_type&&

	* include/experimental/bits/fs_path.h (path::path(string_type&&))
	(path::operator=(string&&), path::assign(string_type&&)): Define
	construction and assignment from string_type rvalues (LWG 2707).

From-SVN: r241416

libstdc++-v3/ChangeLog

+2016-10-21  Jonathan Wakely  <jwakely@redhat.com>
+
+	* include/experimental/bits/fs_path.h (path::path(string_type&&))
+	(path::operator=(string&&), path::assign(string_type&&)): Define
+	construction and assignment from string_type rvalues (LWG 2707).
+
 2016-10-21  Eelis van der Weegen  <eelis@eelis.net>
 
 	* include/bits/stl_algo.h (__gen_two_uniform_ints): Move logic out

libstdc++-v3/include/experimental/bits/fs_path.h

@@ -159,6 +159,10 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
       __p.clear();
     }
 
+    path(string_type&& __source)
+    : _M_pathname(std::move(__source))
+    { _M_split_cmpts(); }
+
     template<typename _Source,
 	     typename _Require = _Path<_Source>>
       path(_Source const& __source)
@@ -193,6 +197,8 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
 
     path& operator=(const path& __p) = default;
     path& operator=(path&& __p) noexcept;
+    path& operator=(string_type&& __source);
+    path& assign(string_type&& __source);
 
     template<typename _Source>
       _Path<_Source>&
@@ -722,6 +728,14 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
   }
 
   inline path&
+  path::operator=(string_type&& __source)
+  { return *this = path(std::move(__source)); }
+
+  inline path&
+  path::assign(string_type&& __source)
+  { return *this = path(std::move(__source)); }
+
+  inline path&
   path::operator+=(const path& __p)
   {
     return operator+=(__p.native());