public override Verb CreateVerb(string[] tokens)
{
var text = new StringBuilder();
var unicode = new StringBuilder();
var quote = tokens[1][0];
var type = QuotePositionType.First;
var start = position;
for (var i = position; i < source.Length; i++)
{
var ch = source[i];
switch (type)
{
case QuotePositionType.First:
if (ch == quote)
{
type = QuotePositionType.Content;
Color(position, i - position, Whitespaces);
start = i;
}
break;
case QuotePositionType.Escaped:
switch (ch)
{
case 't':
text.Append('\t');
break;
case 'r':
text.Append('\r');
break;
case 'n':
text.Append('\n');
break;
case 'l':
text.Append("\r\n");
break;
case 'u':
type = QuotePositionType.Unicode;
unicode.Clear();
continue;
default:
text.Append("`");
text.Append(ch);
break;
}
type = QuotePositionType.Content;
break;
case QuotePositionType.Content:
if (ch == quote)
{
overridePosition = i + 1;
Color(start, i - start + 1, Strings);
result.Value = Runtime.ReplaceEscapedValues(text.ToString());
return(new Push(result.Value));
}
if (ch == '`')
{
type = QuotePositionType.Escaped;
}
else
{
text.Append(ch);
}
break;
case QuotePositionType.Unicode:
if (ch.ToString().IsMatch("['0-9a-fA-F_']"))
{
unicode.Append(ch);
}
else
{
var number = HexParser.GetNumber(unicode.ToString());
text.Append((char)number);
type = QuotePositionType.Content;
if (ch != '`')
{
goto case QuotePositionType.Content;
}
}
break;
}
}
throw "Open string".Throws();
}
static char getHex(string unicode) => (char)HexParser.GetNumber(unicode);