PostIncrement.cs

using System;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.Script.Operators.Assignments.Post
{
    public class PostIncrement : ScriptLeafNodeVariableReference
    {
        public PostIncrement(string VariableName, int Start, int Length, Expression Expression)
            : base(VariableName, Start, Length, Expression)
        {
        }
 
        public override IElement Evaluate(Variables Variables)
        {
            if (!Variables.TryGetVariable(this.variableName, out Variable v))
                throw new ScriptRuntimeException("Variable not found: " + this.variableName, this);
 
            IElement Value = v.ValueElement;
            IElement Value2;
 
            if (Value.AssociatedObjectValue is double d)
                Value2 = new DoubleNumber(d + 1);
            else
                Value2 = Pre.PreIncrement.Increment(Value, this);
 
            Variables[this.variableName] = Value2;
 
            return Value;
        }
 
    }
}