This is what FileType on Windows should ideally be.

Author: retep998

src/libstd/sys/windows/fs.rs

@@ -38,8 +38,9 @@ pub struct FileAttr {
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
-pub enum FileType {
-    Dir, File, SymlinkFile, SymlinkDir, ReparsePoint, MountPoint,
+pub struct FileType {
+    attributes: c::DWORD,
+    reparse_tag: c::DWORD,
 }
 
 pub struct ReadDir {
@@ -516,30 +517,28 @@ impl FilePermissions {
 
 impl FileType {
     fn new(attrs: c::DWORD, reparse_tag: c::DWORD) -> FileType {
-        match (attrs & c::FILE_ATTRIBUTE_DIRECTORY != 0,
-               attrs & c::FILE_ATTRIBUTE_REPARSE_POINT != 0,
-               reparse_tag) {
-            (false, false, _) => FileType::File,
-            (true, false, _) => FileType::Dir,
-            (false, true, c::IO_REPARSE_TAG_SYMLINK) => FileType::SymlinkFile,
-            (true, true, c::IO_REPARSE_TAG_SYMLINK) => FileType::SymlinkDir,
-            (true, true, c::IO_REPARSE_TAG_MOUNT_POINT) => FileType::MountPoint,
-            (_, true, _) => FileType::ReparsePoint,
-            // Note: if a _file_ has a reparse tag of the type IO_REPARSE_TAG_MOUNT_POINT it is
-            // invalid, as junctions always have to be dirs. We set the filetype to ReparsePoint
-            // to indicate it is something symlink-like, but not something you can follow.
+        FileType {
+            attributes: attrs,
+            reparse_tag: reparse_tag,
         }
     }
 
-    pub fn is_dir(&self) -> bool { *self == FileType::Dir }
-    pub fn is_file(&self) -> bool { *self == FileType::File }
+    pub fn is_dir(&self) -> bool {
+        self.attributes & c::FILE_ATTRIBUTE_DIRECTORY != 0
+    }
+    pub fn is_file(&self) -> bool {
+        self.attributes & c::FILE_ATTRIBUTE_DIRECTORY == 0
+    }
     pub fn is_symlink(&self) -> bool {
-        *self == FileType::SymlinkFile ||
-        *self == FileType::SymlinkDir ||
-        *self == FileType::MountPoint
+        self.is_reparse_point() && (
+            self.reparse_tag == c::IO_REPARSE_TAG_SYMLINK ||
+            self.reparse_tag == c::IO_REPARSE_TAG_MOUNT_POINT)
     }
     pub fn is_symlink_dir(&self) -> bool {
-        *self == FileType::SymlinkDir || *self == FileType::MountPoint
+        self.is_symlink() && self.is_dir()
+    }
+    pub fn is_reparse_point(&self) -> bool {
+        self.attributes & c::FILE_ATTRIBUTE_REPARSE_POINT != 0
     }
 }