public ParsingResult Parse(string expression)
{
InputStream input = new InputStream(expression);
var tokens = grammar.Parse(input);
var filteredTokens = grammar.Filter(tokens);
var tokensList = filteredTokens.ToList();
var sortedParameters = (from token in tokensList
where token is ParameterToken
let i = tokensList.IndexOf(token)
orderby i
select token).Distinct(new NameParameterEqueliatyComparer()).ToList();
var mixedTokens = grammar.ConvertToMixed(filteredTokens);
var ast = grammar.CreateAST(mixedTokens);
if (mixedTokens.Count != 1)
{
throw new ParserException("Wrong expression.");
}
var optimizedAst = ast.Optimize();
var paramsDict = Parameters.ToDictionary(s => Parameters.IndexOf(s));
var dict = new Dictionary <string, int>();
foreach (var item in paramsDict)
{
dict.Add(item.Value, item.Key);
}
var result = new ParsingResult
{
Tree = optimizedAst,
ParameterNames = sortedParameters.Select(token => ((ParameterToken)token).ParameterName),
ParameterExpressions = grammar.ParameterExpressions.Values.OrderBy(p => dict[p.Name]).ToArray()
};
return(result);
}