Manually implement Debug and make convert_error more generic.

src/parser/org_source.rs

@@ -11,7 +11,7 @@ use nom::Slice;
 use crate::error::CustomError;
 use crate::error::MyError;
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Copy, Clone)]
 pub struct OrgSource<'s> {
     full_source: &'s str,
     start: usize,
@@ -24,6 +24,14 @@ pub struct OrgSource<'s> {
     parenthesis_depth: isize, // ()
 }
 
+impl<'s> std::fmt::Debug for OrgSource<'s> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_tuple("OrgSource")
+            .field(&Into::<&str>::into(self))
+            .finish()
+    }
+}
+
 impl<'s> OrgSource<'s> {
     /// Returns a wrapped string that keeps track of values we need for parsing org-mode.
     ///
@@ -302,7 +310,9 @@ impl<'s> InputTakeAtPosition for OrgSource<'s> {
     }
 }
 
-pub fn convert_error(err: nom::Err<CustomError<OrgSource<'_>>>) -> nom::Err<CustomError<&str>> {
+pub fn convert_error<'a, I: Into<CustomError<&'a str>>>(
+    err: nom::Err<I>,
+) -> nom::Err<CustomError<&'a str>> {
     match err {
         nom::Err::Incomplete(needed) => nom::Err::Incomplete(needed),
         nom::Err::Error(err) => nom::Err::Error(err.into()),