operator == method

  1. @override
bool operator == (
  1. dynamic other
)
override

The equality operator.

The default behavior for all Objects is to return true if and only if this and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

  • Total: It must return a boolean for all arguments. It should never throw or return null.

  • Reflexive: For all objects o, o == o must be true.

  • Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

  • Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator it should override the hashCode method as well to maintain consistency.

Implementation

@override
bool operator ==(dynamic other) {
  if (identical(this, other))
    return true;
  return other is TextStyle
      && other._fontFamily == _fontFamily
      && other._fontSize == _fontSize
      && other._letterSpacing == _letterSpacing
      && other._wordSpacing == _wordSpacing
      && other._height == _height
      && other._decorationThickness == _decorationThickness
      && other._locale == _locale
      && other._background == _background
      && other._foreground == _foreground
      && _listEquals<int>(other._encoded, _encoded)
      && _listEquals<Shadow>(other._shadows, _shadows)
      && _listEquals<String>(other._fontFamilyFallback, _fontFamilyFallback)
      && _listEquals<FontFeature>(other._fontFeatures, _fontFeatures);
}