private static IState GetState(IState parentState, XElement stateElement, Solver solver)
=> stateElement == null
? parentState
: StateParser.Parse(null, parentState, stateElement, solver).State;
private static Solver SolverWithPuzzleStates(this Solver initialSolver, XDocument document)
=> (from statesElement in document.Root.Elements("States")
private static (Algorithm Algorithm, PuzzleColor[] Colors) GetBaseAlgorithm(XElement element, Solver solver)
{
var attribute = element.Attribute("Base");
if (attribute == null)
{
return(Algorithm.Empty, null);
}
var(name, colors) = ExpressionParser.ParseInner(attribute.Value);
Algorithm algorithm;
if (!solver.AlgorithmTemplates.TryGetValue(name, out algorithm))
{
if (!solver.Algorithms.TryGetValue(name, out algorithm))
{
throw new InvalidOperationException($"The '{name}' algorithm or algorithm template could not be found.");
}
}
return(algorithm, colors);
}