Coverage Summary for Class: Expr (dev.suresh)

 package dev.suresh;
 
 import org.jspecify.annotations.NullMarked;
 
 @NullMarked
 public sealed interface Expr {
     record Add(Expr left, Expr right) implements Expr {
     }
 
     record Mul(Expr left, Expr right) implements Expr {
     }
 
     record Div(Expr left, Expr right) implements Expr {
     }
 
     record Neg(Expr e) implements Expr {
     }
 
     sealed interface Const extends Expr {
         record Int(int i) implements Const {
         }
 
         record Double(double d) implements Const {
         }
 
         record Long(long l) implements Const {
         }
 
         record Str(String s) implements Const {
         }
     }
 
     static long eval(Expr expr) {
         return switch (expr) {
             case Expr.Add(var l, var r) -> eval(l) + eval(r);
             case Expr.Mul(var l, var r) -> eval(l) * eval(r);
             case Expr.Div(var l, var r) -> eval(l) / eval(r);
             case Expr.Neg(var e) -> -eval(e);
             case Expr.Const c -> switch (c) {
                 case Expr.Const.Int(var i) -> i;
                 case Expr.Const.Double(var d) -> (long) d;
                 case Expr.Const.Long(var l) -> l;
                 case Expr.Const.Str(var s) -> Long.parseLong(s);
             };
         };
     }
 }