Getting line and colone in the code.

[Oualitsen]

Hello,
I have a side project that is a parser for graphql. the main goal of it is to generate classes from a graphql schema.
I cannot seem to find a way to get the line and the column of the code that is being parsed.
I want to throw some ParseException with a good description and the where (namely the line : column) the issue came from.
I have already used JavaCC for parsing a subset of the ECMAScript language as a school project and I remember that JavaCC has that.
I wonder if petitParser has that or should we implement something to track the lines and the columns.
Thank you,
Ramdane.

[renggli]

The Token class provides such a helper:

dart-petitparser/lib/src/core/token.dart

Line 89 in fc676d0

static List<int> lineAndColumnOf(String buffer, int position) {

You can either use that static method, or build your own similar helper.

Example usage:

final result = parser.parse(input);
if (result.isFailure) {
  final lineAndColumn = Token.lineAndColumnOf(input, result.position);
  print('Error ${result.message} at ${lineAndColumn.join(':')}');
  ...

[Oualitsen]

Thank you very much for your fast response and Good Job by the way Lukas :)