public static int CalculateMoveCost(IMaybe <LocationCandiate> parent, Vector location)
{
var parentCost = parent.Select(x => x._currentCost).OrElse(0);
var moveCost = parent
.Select(x => (int)(x.Location.DistanceFrom(location) * DistanceMultiplier))
.OrElse(0);
return(parentCost + moveCost);
}
public static IMaybe <U> Apply <T, U>(this IMaybe <Func <T, U> > func, IMaybe <T> m)
{
if (func.HasValue)
{
return(m.Select(func.Value));
}
else
{
return(None <U>());
}
}
public T this[int index]
{
get
{
Debug.Assert(index >= 0);
return(_buffer
.Select(buffer => buffer[index])
.OrElse(() => _source[index]));
}
}
public static IMaybe <Path> FindRoute(
this Vector start, Vector target,
Func <Vector, bool> isValidMove,
IMaybe <int> breakSize)
{
Debug.Assert(isValidMove != null);
if (start == target)
{
return(Maybe <Path> .None);
}
var lists = RouteFinderLists
.Create()
.Open(LocationCandiate.Create(target, start));
while (lists.HasOpenCandidates)
{
// Capture to stop access modified closure
var closedList = lists.ClosedList;
if (breakSize.Select(x => x < closedList.Count).OrElse(false))
{
break;
}
var currentNode = lists.NextOpenCandiate;
if (currentNode.Location == target)
{
return(BuildActorPath(currentNode).ToSome());
}
lists = OpenCandidateMoves(
lists, currentNode, target, isValidMove);
}
return(Maybe <Path> .None);
}
public static IMaybe <TResult> Map <T, TResult>(
this IMaybe <T> source,
Func <T, TResult> selector)
=> source.Select(selector);
public void Select_Theory(IMaybe <int> m1, Func <int, string> mapFn, object expectation)
{
var result = m1.Select(mapFn);
Assert.Equal(expectation, result);
}
public static IMaybe <TResult> SelectMany <T, TResult>(
this IMaybe <T> source,
Func <T, IMaybe <TResult> > selector)
{
return(source.Select(selector).Flatten());
}