Implement Default for std::io::FilePermission

Author: nham

src/libstd/io/mod.rs

@@ -223,6 +223,7 @@ responding to errors that may occur while attempting to read the numbers.
 
 use char::Char;
 use collections::Collection;
+use default::Default;
 use fmt;
 use int;
 use iter::Iterator;
@@ -1829,6 +1830,11 @@ on unix-like systems."]
     }
 )
 
+impl Default for FilePermission {
+    #[inline]
+    fn default() -> FilePermission { FilePermission::empty() }
+}
+
 #[cfg(test)]
 mod tests {
     use super::{IoResult, Reader, MemReader, NoProgress, InvalidInput};