private ParseResult ParseInternal(string text, Type forcedOutputType, params Parameter[] parameters)
{
_parameters = parameters;
var tokenizer = new Tokenizer();
var nodes = tokenizer.Tokenize(text);
tokenizer.AggregateOperators(nodes);
tokenizer.Categorize(nodes, _parameters);
var expressionBuilder = new ExpressionBuilder(parameters, forcedOutputType);
var expression = expressionBuilder.BuildExpression(nodes);
var lambda = Expression.Lambda(expression, expressionBuilder.Parameters);
return(new ParseResult(lambda));
}