BadNullCoalescingExpression.cs

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using BadScript2.Common;
using BadScript2.Parser.Expressions.Binary;
using BadScript2.Runtime;
using BadScript2.Runtime.Objects;
 
namespace BadScript2.Parser.Expressions.Access;
 
public class BadNullCoalescingExpression : BadBinaryExpression
{
    public BadNullCoalescingExpression(BadExpression left, BadExpression right, BadSourcePosition position) : base(left,
                                                                                                                   right,
                                                                                                                   position
                                                                                                                  ) { }
 
    protected override IEnumerable<BadObject> InnerExecute(BadExecutionContext context)
    {
        BadObject left = BadObject.Null;
 
        foreach (BadObject o in Left.Execute(context))
        {
            left = o;
        }
 
        left = left.Dereference(Position);
 
        if (left == BadObject.Null)
        {
            foreach (BadObject o in Right.Execute(context))
            {
                yield return o;
            }
        }
        else
        {
            yield return left;
        }
    }
 
    protected override string GetSymbol()
    {
        return "??";
    }
}