Try using error formatting

schala-lang/language/src/lib.rs

@@ -1,3 +1,4 @@
+#![feature(or_patterns)]
 #![feature(trace_macros)]
 //#![feature(unrestricted_attribute_tokens)]
 #![feature(slice_patterns, box_patterns, box_syntax)]

schala-lang/language/src/parser.rs

@@ -215,6 +215,13 @@ fn expression_kind(text: &str) -> ParseResult<ExpressionKind> {
 }
 
 pub fn perform_parsing(input: &str) -> Result<String, String> {
-  let output = expression_kind(input);
-  Ok(format!("{:?}", output))
+  let output = match expression_kind(input) {
+    Ok((rest, ast)) => format!("{:?}", ast),
+    Err(nom::Err::Incomplete(needed)) => format!("Incomplete: {:?}" ,needed),
+    Err(nom::Err::Error(verbose_error) | nom::Err::Failure(verbose_error)) => {
+      nom::error::convert_error(input, verbose_error)
+    }
+  };
+      
+  Ok(output)
 }