public ParseResult <object> Parse(IEnumerable <Type> verbTypes, string input)
{
Dictionary <string, Type> verbs = OptionsClassProcessor.GetVerbs(verbTypes);
var tokenizer = new Tokenizer(input);
var token = tokenizer.NextToken;
if (token.Kind != TokenKind.Value)
{
DisplayHelp(verbs, null);
return(ParseResult <object> .WithError("Could not find an expected verb"));
}
if (token.Value == "help")
{
DisplayHelp(verbs, tokenizer);
// The user intentionally asked for help, and this is not an error. The caller has to
// be aware of the option that they are getting a null value in that case.
return(ParseResult <object> .WithValue(null));
}
Type type;
if (!verbs.TryGetValue(token.Value, out type))
{
DisplayHelp(verbs, null);
return(ParseResult <object> .WithError("Could not find a match for verb '" + token.Value + "'"));
}
var result = Parse(type, tokenizer.RestOfInput);
if (!result.Success)
{
_helpWriter.Write(Usage(type));
}
return(result);
}
