better Pos

src/days/day__/mod.rs

@@ -1,4 +1,5 @@
 use super::template::{DayTrait, ResultType};
+use nom::{error::Error, Err, IResult, Parser};
 use thiserror::Error;
 
 const DAY_NUMBER: usize = todo!();
@@ -21,8 +22,14 @@ impl DayTrait for Day {
 
 #[derive(Debug, Error)]
 enum DayError {
-    #[error("Dummy")]
-    Dummy,
+    #[error("Not a valid description: {0}")]
+    ParsingError(String),
+}
+
+impl From<Err<Error<&str>>> for DayError {
+    fn from(error: Err<Error<&str>>) -> Self {
+        DayError::ParsingError(error.to_string())
+    }
 }
 
 #[cfg(test)]