better parser errors

error_test/parser/pattern_errors.sui

@@ -1,5 +1,14 @@
 # Pattern matching errors
+struct Point
+  x: int,
+  y: int,
+end
 
+enum Result
+  Ok(int)
+  Err(string)
+end
+ 
 # Invalid pattern in match
 fn test() -> int
     match 42
@@ -7,26 +16,20 @@ fn test() -> int
     end
 
 # Missing colon in struct pattern
-fn test() -> int
-    struct Point
-        x: int
-        y: int
-    end
-    let p = Point { x: 5, y: 10 }
+fn test() -> int do
+   let p = Point { x: 5, y: 10 }
     match p
         Point { x 5, y: 10 } => 1
     end
+end
 
 # Invalid enum pattern
-fn test() -> int
-    enum Result
-        Ok(int)
-        Err(string)
-    end
-    let r = Result::Ok(42)
+fn test() -> int do
+   let r = Result::Ok(42)
     match r
         Result::Ok value => value
     end
+end
 
 # Missing pattern in match arm
 fn test() -> int
@@ -38,4 +41,4 @@ fn test() -> int
 fn test() -> int
     match 42
         x 0
-    end
+    end