private static (bool, int) TryToMatch(string input, IMatcher matcher, TokensCollection result)
{
var match = matcher.TryMatch(input);
if (!match.IsMatching)
{
return(false, 0);
}
result.Add(match.Token);
return(true, match.NextIndex);
}
public IReadOnlyCollection <IToken> Tokenize(string jackClass)
{
if (jackClass == null)
{
throw new ArgumentNullException(nameof(jackClass));
}
var result = new TokensCollection();
var index = 0;
while (index < jackClass.Length)
{
var codeToTokenize = jackClass.Substring(index);
var foundMatch = false;
foreach (var matcher in _matchers)
{
var match = matcher.TryMatch(codeToTokenize);
if (!match.IsMatching)
{
continue;
}
foundMatch = true;
result.Add(match.Token);
index += match.NextIndex;
break;
}
if (!foundMatch)
{
// TODO: Throw custom exception
throw new Exception("The given code cannot be tokenized");
}
}
return(result.AsReadOnly());
}