BadUnaryUnpackExpression.cs

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using BadScript2.Common;
using BadScript2.Runtime;
using BadScript2.Runtime.Error;
using BadScript2.Runtime.Objects;
 
namespace BadScript2.Parser.Expressions.Binary;
 
public class BadUnaryUnpackExpression : BadExpression
{
    public readonly BadExpression Right;
 
    public BadUnaryUnpackExpression(BadExpression right) : base(right.IsConstant, right.Position)
    {
        Right = right;
    }
 
 
    public override IEnumerable<BadExpression> GetDescendants()
    {
        return Right.GetDescendantsAndSelf();
    }
 
    public static void Unpack(BadTable table, BadObject right, BadSourcePosition position)
    {
        if (right is not BadTable rightT)
        {
            throw new BadRuntimeException("Unpack operator requires 1 table", position);
        }
 
        foreach (KeyValuePair<string, BadObject> o in rightT.InnerTable)
        {
            table.InnerTable[o.Key] = o.Value;
            table.PropertyInfos[o.Key] = rightT.PropertyInfos[o.Key];
        }
    }
 
    protected override IEnumerable<BadObject> InnerExecute(BadExecutionContext context)
    {
        BadTable result = context.Scope.GetTable();
        BadObject right = BadObject.Null;
 
        foreach (BadObject o in Right.Execute(context))
        {
            right = o;
 
            yield return o;
        }
 
        right = right.Dereference();
 
        Unpack(result, right, Position);
 
        yield return result;
    }
}