Sarcasm.Unparsing.FormatYielder.UpdateCacheOnTheFly C# (CSharp) Méthode

        private void UpdateCacheOnTheFly(UnparsableAst self, State state)
        {
            if (state == State.Before)
            {
                if (self.SyntaxParent == null)
                    topAncestorCacheForLeft = null;     // self is root node
                else if (self.IsLeftSiblingCalculated && self.LeftSibling != null)
                    topAncestorCacheForLeft = self;
                else
                    topAncestorCacheForLeft = UnparsableAst.NonCalculated;
            }
            else if (state == State.After)
            {
                if (direction == Unparser.Direction.LeftToRight && self.BnfTerm is Terminal)
                    leftTerminalLeaveCache = self;
                else if (direction == Unparser.Direction.RightToLeft && self == topAncestorCacheForLeft)
                    leftTerminalLeaveCache = UnparsableAst.NonCalculated;
            }
        }