private ParserNode BuildGraphInternal(RuleExpression rootExpression)
{
_currContext = GraphContext.ForRoot(rootExpression);
_recursiveNodes.Clear();
do
{
var ctx = _currContext;
if (ctx.expression != null)
{
ctx.expression.Visit(_expressionsVisitor);
}
else
{
throw new NotImplementedException(); // should never happen
}
if (_currContext == ctx)
{
throw new InvalidOperationException(string.Format("Missing transition for expression [{0}] of rule [{1}] was not created!", _currContext.expression, _currContext.rule));
}
if (_currContext == null)
{
throw new InvalidOperationException(string.Format("Invalid handler for expression [{0}] of rule [{1}]!", _currContext.expression, _currContext.rule));
}
//if (_currContext.prevContext != ctx)
// throw new InvalidOperationException(string.Format("Invalid previos context was set from handler for expression [{0}] of rule [{1}] was not created!", _currContext.expression, _currContext.rule));
} while (_currContext.parentContext != null);
if (_currContext.childEntries == null ||
_currContext.childEntries.prev != null)
{
throw new InvalidOperationException();
}
foreach (var item in _recursiveNodes)
{
ParserNode target = null;
for (var n = item.Parent; n != null; n = n.Parent)
{
if (n.Rule == item.Rule && n.Parent.Rule != item.Rule && n.Parent is ParserNode.RuleCall)
// && item.TargetCallExpr.ToString() && )
{
target = n.Parent;
break;
}
}
if (target == null)
{
throw new InvalidOperationException(string.Format("Filed to find recursive rule call target for rule [{0}] from rule [{1}]!", item.Rule, item.Parent.Rule));
}
item.SetTarget(target);
}
return(_currContext.childEntries.node);
}
