source: branches/PushGP/HeuristicLab.Algorithms.PushGP/HeuristicLab.Algorithms.PushGP/Expressions/PushResultExpression.cs @ 14392

using System;
using HeuristicLab.Algorithms.PushGP.Stack;

namespace HeuristicLab.Algorithms.PushGP.Expressions
{
    public abstract class PushResultExpression<T> : Expression
    {
        public PushResultExpression(string stringRepresentation) : base(stringRepresentation)
        { }

        protected void Eval(IStack<T> stack, int count, Func<T[], T> templateFunc)
        {
            if (stack.Count < count)
                return;

            stack.PushResult(count, templateFunc);
        }

        protected void Eval(IStack<T> stack, int count, Func<T[], T> templateFunc, T ignoreValue)
        {
            if (stack.Count < count || stack.Top.Equals(ignoreValue))
                return;

            stack.PushResult(count, templateFunc);
        }

        protected void Eval<R>(IStack<T> stack, IStack<R> resultStack, int count, Func<T[], R> templateFunc)
        {
            if (stack.Count < count)
                return;

            var items = stack.Pop(count);
            var result = templateFunc(items);

            resultStack.Push(result);
        }
    }
}