Error messages

examples/val_binding.misti

@@ -0,0 +1 @@
+val identifier = 322

src/error_handling/lex_error.rs

@@ -14,11 +14,12 @@ impl PrintableError for LexError {
         let whitespace = whitespace.iter().collect::<String>();
 
         format!(
-            "\n{}\n{}^\n\n{}{}", 
+            "\n{}\n{}^\n\n{}{}\n{}", 
             erroneous_code, 
             whitespace, 
             "Invalid character at pos ",
             self.position + 1,
+            self.reason,
         )
     }
 }

src/lexic/mod.rs

@@ -85,7 +85,11 @@ fn next_token(chars: &Chars, current_pos: usize) -> LexResult {
         .unwrap_or_else(|| {
             let error = LexError {
                 position: current_pos,
-                reason: format!("Unrecognized character: {}", next_char),
+                reason: format!(
+                    "Unrecognized character `{}` (escaped: `{}`)",
+                    next_char, 
+                    next_char.escape_default().to_string(),
+                ),
             };
             LexResult::Err(error)
         })