add into<box> :3c

src/roxy.rs

@@ -10,6 +10,12 @@ pub trait Parse {
     fn parse(&mut self, path: &str, src: &[u8], dst: &mut Vec<u8>) -> Result<(), Error>;
 }
 
+impl<'a, P: Parse + 'static> Into<Box<dyn Parse>> for (P,) {
+    fn into(self) -> Box<dyn Parse> {
+        Box::new(self.0)
+    }
+}
+
 pub trait AndThenParser<P> {
     fn and_then(&mut self, parser: P) -> &Self;
 }