extension traits: Use extend::ext

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/src/utils.rs b/src/utils.rs
index e525e6e56cd7279c1d5ca6cb1bbe7957914d7c06..c264c738c29ed289c199faabb858bdd4d20e1d16 100644 (file)
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -110,11 +110,8 @@ impl<T> OptionExt for Option<T> {
 
 // https://github.com/rust-lang/rust/issues/32255 :-(
 
-pub trait LocalFileExt {
-  fn close(self) -> Result<(), io::Error>;
-}
-
-impl LocalFileExt for fs::File {
+#[ext(pub, name=LocalFileExt, supertraits=Sized)]
+impl fs::File {
   #[throws(io::Error)]
   fn close(self) {
     let r = unsafe {