Refactor statements

src/lang/Nub.Lang/Frontend/Parsing/Expressions/UnaryExpressionNode.cs

@@ -0,0 +1,15 @@
+using Nub.Lang.Frontend.Lexing;
+
+namespace Nub.Lang.Frontend.Parsing;
+
+public class UnaryExpressionNode(IReadOnlyList<Token> tokens, UnaryExpressionOperator @operator, ExpressionNode operand) : ExpressionNode(tokens)
+{
+    public UnaryExpressionOperator Operator { get; } = @operator;
+    public ExpressionNode Operand { get; } = operand;
+}
+
+public enum UnaryExpressionOperator
+{
+    Negate,
+    Invert
+}