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 representation.

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 = traces.map((trace) {
    return trace.frames
        .map((frame) => frame.location.length)
        .fold(0, math.max);
  }).fold(0, math.max);

  // Don't call out to [Trace.toString] here because that doesn't ensure that
  // padding is consistent across all traces.
  return traces.map((trace) {
    return trace.frames.map((frame) {
      return '${frame.location.padRight(longest)}  ${frame.member}\n';
    }).join();
  }).join(chainGap);
}