Lark.js
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lark-parser
SyntaxError: Invalid regular expression returned when parsing
Grammar file: https://github.com/opencybersecurityalliance/kestrel-lang/blob/develop/src/kestrel/syntax/kestrel.lark Generated parser: kestrelParser.js.zip
When parsing this statement procs2 = GET process abc, the parser throws the exception like below which is not caught by parser.
Code
function handle_errors(e) { return true; }
try {
treeData = parser.parse(text, null, handle_errors).children[0];
} catch (e) {
console.debug("uncaught error:", e)
}
Expected:
This kind of error can be handled by the parser, so we can get the parsing tree and the error info like Unexpected character or Unexpected Token.
This happens because Javascript's regex implementation doesn't support all the features that Python has.
This might take a bit longer to fix.
Meanwhile, a possible work around is to change
FUNCNAME: (MIN|MAX|SUM|AVG|COUNT|NUNIQUE)
to
funcname: (MIN|MAX|SUM|AVG|COUNT|NUNIQUE)
This happens because Javascript's regex implementation doesn't support all the features that Python has.
This might take a bit longer to fix.
Meanwhile, a possible work around is to change
FUNCNAME: (MIN|MAX|SUM|AVG|COUNT|NUNIQUE)to
funcname: (MIN|MAX|SUM|AVG|COUNT|NUNIQUE)
Do you mean to edit the generated parser.js? However, I could not find the string.
FUNCNAME: (MIN|MAX|SUM|AVG|COUNT|NUNIQUE)
yeah, updating the grammar from FUNCNAME to funcname works. Looking forward to your fix. :)
The "fix" is most likely going to be preventing users from doing what you were trying to do and throwing an error instead.
I don't know if there is a way to make it work in Javascript. At least, without implementing part of the regex mechanism myself.
I got it. Thanks. Would you mind to release a version which contains other fixes first?