/// <param name="p">The current state.</param>
/// <param name="x">The current tape cell contents.</param>
/// <param name="q">The next state.</param>
/// <param name="y">The character to replace the tape cell with.</param>
/// <param name="d">The direction to move the tape head after transitioning.</param>
public TuringTransition(State p, char x, State q, char y, TuringMachine.Direction d) : base(p, x, q)
{
B = y;
Direction = d;
if (p == null || q == null)
{
throw new NullReferenceException("Null state reference not allowed!");
}
}
private static TuringMachine.ParseError ParseDirection(string parseString, out TuringMachine.Direction direction)
{
switch (parseString)
{
case "L":
direction = TuringMachine.Direction.L;
return(null);
case "R":
direction = TuringMachine.Direction.R;
return(null);
default:
direction = TuringMachine.Direction.L;
return(new TuringMachine.ParseError("Invalid direction symbol: \"" + parseString + "\""));
}
}
