code: package edu.utexas.cs.utopia.cortado.expression.ast.bool;
  
  import edu.utexas.cs.utopia.cortado.expression.ast.Expr;
  import edu.utexas.cs.utopia.cortado.expression.factories.CachedExprTypeFactory;
  import edu.utexas.cs.utopia.cortado.expression.type.IntegerType;
  import edu.utexas.cs.utopia.cortado.expression.visitors.astvisitor.ExprRetVisitor;
  import edu.utexas.cs.utopia.cortado.expression.visitors.astvisitor.ExprVisitor;
  
  import java.util.Objects;
  
  public class LessEqExpr extends BoolExpr
  {
      private static final IntegerType INT_TY = CachedExprTypeFactory.getInstance().mkIntegerType();
  
      private final Expr left;
  
      private final Expr right;
  
      public LessEqExpr(Expr left, Expr right)
      {
          if(left.getType() != INT_TY || right.getType() != INT_TY)
              throw new IllegalArgumentException("Non-integer argument for operator <=");
  
          this.left = left;
          this.right = right;
      }
  
      public Expr getLeft()
      {
          return left;
      }
  
      public Expr getRight()
      {
          return right;
      }
  
      @Override
      public ExprKind getKind()
      {
          return ExprKind.LEQ;
      }
  
      @Override
      public void prettyPrint(StringBuilder b, String indent)
      {
          String opStr = "(<= ";
          String incrIndent = "    ";
  
          b.append(opStr);
          prettyPrintExprWithArgs(b, indent + incrIndent, left, right);
      }
  
      @Override
      public void accept(ExprVisitor v)
      {
          v.visit(this);
      }
  
      @Override
      public <R> R accept(ExprRetVisitor<R> v)
      {
          return v.visit(this);
      }
  
      @Override
      public boolean equals(Object o)
      {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
          LessEqExpr gEqExpr = (LessEqExpr) o;
          return left.equals(gEqExpr.left) && right.equals(gEqExpr.right);
      }
  
      @Override
      public int hashCode()
      {
          return memoizedHashCode != 0 ? memoizedHashCode : (memoizedHashCode = Objects.hash(left, right, this.getClass()));
      }
  }
  