halp, i cant write a recursive iterator :3

edn/src/edn_error.rs

@@ -0,0 +1,20 @@
+use crate::*;
+
+#[derive(Debug)]
+pub enum ParseError {
+    Unknown(u8),
+    Empty,
+    Incomplete,
+    Unexpected(char),
+}
+impl std::fmt::Display for ParseError {
+    fn fmt (&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::Empty => write!(f, "empty"),
+            Self::Incomplete => write!(f, "incomplete"),
+            Self::Unexpected(c) => write!(f, "unexpected '{c}'"),
+            Self::Unknown(i) => write!(f, "unknown #{i}"),
+        }
+    }
+}
+impl std::error::Error for ParseError {}