From 5e8a2a90eda390cbe5272e209fdc085ad7d51077 Mon Sep 17 00:00:00 2001
From: Marvin Schlegel <i22031@hb.dhbw-stuttgart.de>
Date: Wed, 8 May 2024 00:00:18 +0200
Subject: [PATCH] parser improve error messages

---
 src/Parser/JavaParser.y | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Parser/JavaParser.y b/src/Parser/JavaParser.y
index 8edb2df..6c249ac 100644
--- a/src/Parser/JavaParser.y
+++ b/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)
 
 }