Add line numbers to parse errors

[darronschall]

Originally filed by Touvan on 2010-02-17T21:42:37

What steps will reproduce the problem?

1. If you parse a manually create JSON file, it does not give you a line error
   for the error in the error text.

You can get the line number using something like this:

try {
JSON.decode(rawJSONString);
}
catch (e:JSONParseError) {
String(rawJSONString).substring(0, e.location).split("\n").length
}

It would be nicer if it was already included in the error text.

I'd be happy to make a patch if you are interested (I assume I'd have to patch
the tokenizer.parseError() lines in JSONDecoder.as ..)

[darronschall]

Updated by Touvan on 2010-02-17T21:54:32

oh, or maybe JSONTokenizer.as

[darronschall]

Updated by Touvan on 2010-03-03T19:35:51

I did this in JSONTokenizer, though I'm sure a property with the line number and a way to append it in the
parseError (where the rest of the message is constructed) call would be more appropriate. This worked for my
needs though.

public function parseError( message:String ):void {
throw new JSONParseError(
message + " (line " + jsonString.substring(0, loc).split("\n").length +")",
loc, jsonString
);
}