public static Token ParsingUsingIterator(PeekableEnumerableAdapter <char> iterator)
{
string s = "";
while (iterator.HasNext)
{
char lookahead = iterator.Peek();
if (AlphabetHelper.IsLetter(lookahead))
{
s += lookahead;
}
else
{
break;
}
iterator.Next();
}
if (KeyWords.IsKeyword(s))
{
return(new Token(TokenType.KEYWORD, s));
}
if (s.Equals("true") || s.Equals("false"))
{
return(new Token(TokenType.BOOLEAN, s));
}
return(new Token(TokenType.VARIABLE, s));
}
public static Token MakeString(PeekableEnumerableAdapter <char> iterator)
{
string s = "";
IMakeStringState startState = new StartMakeStringState();
MakeStringContent content = new MakeStringContent(startState);
while (iterator.HasNext)
{
char c = iterator.Next();
content.C = c;
Token token = content.State.DoAction(content, s + c);
if (token != null)
{
return(token);
}
else
{
s = content.Concat(s);
}
}
throw new LexicalException("Unexpected error");
}