src/Parser/JavaParser.y

@@ -7,6 +7,7 @@ import Parser.Lexer
 %name parse
 %tokentype { Token }
 %error { parseError }
+%errorhandlertype explist
   
 %token 
         BOOLEAN { BOOLEAN }
@@ -368,7 +369,7 @@ data Declarator = Declarator Identifier (Maybe Expression)
 convertDeclarator :: DataType -> Declarator -> VariableDeclaration
 convertDeclarator dataType (Declarator id assigment) = VariableDeclaration dataType id assigment
 
-parseError :: [Token] -> a
-parseError msg = error ("Parse error: " ++ show msg)
+parseError :: ([Token], [String]) -> a
+parseError (errortoken, expected) = error ("parse error on token: " ++ show errortoken ++ "\nexpected one of:      " ++ show expected)
 
 }