public override string Parse(string nothing)
{
state = INITIAL;
result = "";
while (Data.HasNext())
{
char c = Data.Next();
switch (state)
{
case INITIAL:
onInitial(c);
break;
case IN_STRING:
onInString(c);
break;
case IN_ESCAPE_SEQUENCE:
onInEscapeSequence(c);
break;
case FINAL:
return(result);
default:
throw new InvalidOperationException($"Unreachable state reached in StringElementParser : {Data.GetPosTextForException()}");
}
}
return(result);
}
private void onInitial(char c)
{
if (c == '"')
{
state = IN_STRING;
}
else if (!ParserUtil.IsNewLineOrWhitespace(c))
{
throw new InvalidCharException("Ungültiges Zeichen in String: StringElementParser.onInitial!", Data);
}
}
private void onInString(char c)
{
if (c == '"')
{
state = FINAL;
}
else if (c == '\\')
{
state = IN_ESCAPE_SEQUENCE;
}
else
{
result += c;
}
}
private void onInEscapeSequence(char c)
{
state = IN_STRING;
switch (c)
{
case 'n': result += '\n';
break;
case 'r': result += '\r';
break;
case 't': result += '\t';
break;
case '\\': result += '\\';
break;
default:
throw new InvalidCharException("Ungültige Escape-Sequenz gefunden", Data);
}
}