toString method Null safety

  1. @override
String toString()
override

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string represetion.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Implementation

@override
String toString() {
  // Figure out the longest path so we know how much to pad.
  var longest =
      frames.map((frame) => frame.location.length).fold(0, math.max);

  // Print out the stack trace nicely formatted.
  return frames.map((frame) {
    if (frame is UnparsedFrame) return '$frame\n';
    return '${frame.location.padRight(longest)}  ${frame.member}\n';
  }).join();
}