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() {
  String explanation;

  if (_messagePrefix == requiredPrefix) {
    explanation = 'Prop $propName is required. ';
  } else if (_messagePrefix == invalidPrefix) {
    explanation = 'Prop $propName set to $invalidValue. ';
  } else if (_messagePrefix == combinationPrefix) {
    explanation = 'Prop $propName and prop $prop2Name are set to incompatible values. ';
  } else {
    explanation = 'Prop $propName. ';
  }

  return '$_messagePrefix$explanation$message'.trim();
}