public bool TakeSnapshot(string name)
{
if (Moves != null)
{
Moves.TakeSnapshot(name);
return(true);
}
else
{
return(false);
}
}
private HeuristicAction TryValue(TekBoard board, TekField field, int value)
{
bool prev = board.EatExceptions;
HeuristicAction result = HeuristicAction.haNone;
try
{
board.EatExceptions = false;
this.Enabled = false; // make sure FindHeuristic doesnt call this recursively!
if ((result = _tryValue(field, value)) == HeuristicAction.haNone)
{
temStoredResults.Clear();
temMoves.TakeSnapshot(_ssDescription(field));
try {
do
{
try
{
result = _tryHeuristic(heuristics.FindHeuristic(board), board);
}
catch (ETekFieldInvalid)
{
result = HeuristicAction.haImpossible;
}
} while (result == HeuristicAction.haNone);
}
finally
{
temMoves.RestoreSnapshot(_ssDescription(field));
_ssIndex++;
}
}
}
finally
{
board.EatExceptions = prev;
this.Enabled = true;
field.Value = 0; // backtracking
}
return(result);
}