build method

@override LogSpan build()

Builds this span into another span, or returns itself if already terminal.

Override this for composable spans that build to other spans. Default implementation returns this.

Example:

class Timestamp extends LeafSpan {
  final DateTime date;
  Timestamp(this.date);

  @override
  LogSpan build() => PlainText('${date.hour}:${date.minute}');
}

Implementation

@override
LogSpan build() {
  final hour = date.hour.toString().padLeft(2, '0');
  final minute = date.minute.toString().padLeft(2, '0');
  final second = date.second.toString().padLeft(2, '0');
  final ms = date.millisecond.toString().padLeft(3, '0');
  return PlainText('[$hour:$minute:$second.$ms]');
}