source: branches/PushGP/HeuristicLab.PushGP/HeuristicLab.Problems.ProgramSynthesis/Push/Expressions/PushExpressions.cs @ 14777

namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
  using HeuristicLab.Problems.ProgramSynthesis.Push.Interpreter;
  using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;

  public abstract class PushExpression<T> : StatefulExpression<T> {

    protected PushExpression(T state) : base(state) { }

    protected bool Eval(IStack<T> stack) {
      stack.Push(this.State);
      return true;
    }

    public override string StringRepresentation { get { return this.State.ToString(); } }
  }

  public class IntegerPushExpression : PushExpression<long> {
    public IntegerPushExpression(long state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.IntegerStack);
    }
  }

  public class FloatPushExpression : PushExpression<double> {
    public FloatPushExpression(double state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.FloatStack);
    }
  }

  public class BooleanPushExpression : PushExpression<bool> {
    public BooleanPushExpression(bool state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.BooleanStack);
    }
  }

  public class NamePushExpression : PushExpression<string> {
    public NamePushExpression(string state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.NameStack);
    }
  }

  public class ExecPushExpression : PushExpression<Expression> {
    public ExecPushExpression(Expression state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.ExecStack);
    }
  }

  public class CharPushExpression : PushExpression<char> {
    public CharPushExpression(char state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.CharStack);
    }
  }

  public class StringPushExpression : PushExpression<string> {
    public StringPushExpression(string state)
      : base(state) {
    }

    public override bool Eval(IPushInterpreter interpreter) {
      return Eval(interpreter.StringStack);
    }
  }
}