Updated Expression type

src/Syntax.hs

@@ -32,11 +32,13 @@ data Expression
   | LiteralBool Bool -- Boolean literal, e.g., True
   | LiteralChar Char -- Character literal, e.g., 'a'
   | LiteralString String -- String literal, e.g., "Hello, World!"
+  -- Lists
   | Variable Identifier -- Variable reference, e.g., x
   | BinaryOperation BinaryOperator Expression Expression -- Binary operation, e.g., x + y
   | UnaryOperation UnaryOperator Expression -- Unary operation, e.g., -x
   | FunctionCall Identifier [Expression] -- Function call, e.g., f(x, y)
   | Ternary Expression Expression Expression -- Conditional expression, e.g., if x then y else z
+  | Expression Expression
   deriving (Show)
 
 data BinaryOperator