For example, inXtext, if there are errors that can't recover from,the validator will show red squiggle lines for all the code below that error by default. But the tokenizer and parser will fail to parse the code after that error same as in Langium. Can langium also implement that? why...
so you need to sign ALL jars in theappletdir. It can be done by standard JDK tools (they may be not in your path though). First, create a keystore with one key. Run the following command in theappletdir: