Fixed trace parsing debug output

schala-lang/language/src/parsing.rs

@@ -245,14 +245,16 @@ impl Parser {
   }
   */
 
-  pub fn format_parse_trace(self) -> Vec<String> {
-    self.parse_record.into_iter().map(|r| {
+  pub fn format_parse_trace(&self) -> String {
+    let mut buf = String::new();
+    for r in self.parse_record.iter() {
       let mut indent = String::new();
       for _ in 0..r.level {
         indent.push(' ');
       }
-      format!("{}Production `{}`, token: {}", indent, r.production_name, r.next_token)
-    }).collect()
+      buf.push_str(&format!("{}Production `{}`, token: {}\n", indent, r.production_name, r.next_token))
+    }
+    buf
   }
 }
 

schala-lang/language/src/schala.rs

@@ -95,16 +95,23 @@ fn tokenizing(input: &str, _handle: &mut Schala, comp: Option<&mut PassDebugArti
 
 fn parsing(input: Vec<tokenizing::Token>, handle: &mut Schala, comp: Option<&mut PassDebugArtifact>) -> Result<ast::AST, String> {
   use crate::parsing::Parser;
+  use ParsingDebugType::*;
 
   let mut parser = handle.active_parser.take().unwrap_or_else(|| Parser::new(input));
   let ast = parser.parse();
-  let trace = parser.format_parse_trace();
 
   comp.map(|comp| {
-    let debug_info = match comp.parsing.as_ref().unwrap_or(&ParsingDebugType::CompactAST) {
-      ParsingDebugType::CompactAST => format!("{:?}", ast),
-      ParsingDebugType::ExpandedAST => format!("{:#?}", ast),
-      ParsingDebugType::Trace => format!("{}", trace[0]) //TODO fix this
+    let debug_format = comp.parsing.as_ref().unwrap_or(&CompactAST);
+    let debug_info = match debug_format {
+      CompactAST => match ast {
+        Ok(ref ast) => format!("{:?}", ast),
+        Err(_) => "Error - see output".to_string(),
+      },
+      ExpandedAST => match ast {
+        Ok(ref ast) => format!("{:#?}", ast),
+        Err(_) => "Error - see output".to_string(),
+      },
+      Trace => parser.format_parse_trace(),
     };
     comp.add_artifact(debug_info);
   });