noodling on sexp

src/sequence.rs

@@ -12,9 +12,13 @@ pub fn surrounded_by<I, O1, O2, E>(
     surrounding: impl Parser<I, O2, E>,
 ) -> impl Parser<I, O1, E> {
     move |input| {
+        println!("surrounded_by");
         let (_result1, rest1) = surrounding.parse(input)?;
+        println!("A");
         let (result2, rest2) = main.parse(rest1)?;
+        println!("B");
         let (_result3, rest3) = surrounding.parse(rest2)?;
+        println!("C");
         Ok((result2, rest3))
     }
 }