toString method

@override String toString()

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() {
  final parameters = [
    'data=${data.toStringAsFixed(4)}',
    if (operation != null) 'operation=${operation?.name}',
    if (label?.isNotEmpty == true) 'label=$label',
    'grad=${grad.toStringAsFixed(4)}',
    if (children.isNotEmpty) 'children=$children',
  ];

  return 'Value(${parameters.join(', ')})';
}