toString method
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 buffer = StringBuffer()..write(expression.toString());
switch (relation) {
case Relation.equalTo:
buffer.write(' == 0 ');
break;
case Relation.greaterThanOrEqualTo:
buffer.write(' >= 0 ');
break;
case Relation.lessThanOrEqualTo:
buffer.write(' <= 0 ');
break;
}
buffer.write(' | priority = $priority');
if (priority == Priority.required) {
buffer.write(' (required)');
}
return buffer.toString();
}