VectorDoWhileDefinition.cs

using System.Threading.Tasks;
using Waher.Runtime.Collections;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
using Waher.Script.Operators.Conditional;
 
namespace Waher.Script.Operators.Vectors
{
    public class VectorDoWhileDefinition : BinaryOperator
    {
        public VectorDoWhileDefinition(DoWhile Elements, int Start, int Length, Expression Expression)
            : base(Elements.LeftOperand, Elements.RightOperand, Start, Length, Expression)
        {
        }
 
        public override IElement Evaluate(Variables Variables)
        {
            ChunkedList<IElement> Elements = new ChunkedList<IElement>();
            BooleanValue Condition;
 
            do
            {
                try
                {
                    Elements.Add(this.left.Evaluate(Variables));
                }
                catch (ScriptBreakLoopException ex)
                {
                    if (ex.HasLoopValue)
                        Elements.Add(ex.LoopValue);
 
                    //ScriptBreakLoopException.Reuse(ex);
                    break;
                }
                catch (ScriptContinueLoopException ex)
                {
                    if (ex.HasLoopValue)
                        Elements.Add(ex.LoopValue);
 
                    //ScriptContinueLoopException.Reuse(ex);
                }
                
                Condition = this.right.Evaluate(Variables) as BooleanValue;
                if (Condition is null)
                    throw new ConditionNotBooleanScriptException(this);
            }
            while (Condition.Value);
 
            return this.Encapsulate(Elements);
        }
 
        public override async Task<IElement> EvaluateAsync(Variables Variables)
        {
            if (!this.isAsync)
                return this.Evaluate(Variables);
 
            ChunkedList<IElement> Elements = new ChunkedList<IElement>();
            BooleanValue Condition;
 
            do
            {
                try
                {
                    Elements.Add(await this.left.EvaluateAsync(Variables));
                }
                catch (ScriptBreakLoopException ex)
                {
                    if (ex.HasLoopValue)
                        Elements.Add(ex.LoopValue);
 
                    //ScriptBreakLoopException.Reuse(ex);
                    break;
                }
                catch (ScriptContinueLoopException ex)
                {
                    if (ex.HasLoopValue)
                        Elements.Add(ex.LoopValue);
 
                    //ScriptContinueLoopException.Reuse(ex);
                }
 
                Condition = await this.right.EvaluateAsync(Variables) as BooleanValue;
                if (Condition is null)
                    throw new ConditionNotBooleanScriptException(this);
            }
            while (Condition.Value);
 
            return this.Encapsulate(Elements);
        }
 
        protected virtual IElement Encapsulate(ChunkedList<IElement> Elements)
        {
            return VectorDefinition.Encapsulate(Elements, true, this);
        }
 
    }
}