operator == method

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

The equality operator.

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

  • 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 ==(Object other) =>
    other is LabelStyle &&
    super == other &&
    textStyle == other.textStyle &&
    // span is a function.
    textAlign == other.textAlign &&
    textDirection == other.textDirection &&
    textScaleFactor == other.textScaleFactor &&
    maxLines == other.maxLines &&
    ellipsis == other.ellipsis &&
    locale == other.locale &&
    strutStyle == other.strutStyle &&
    textWidthBasis == other.textWidthBasis &&
    textHeightBehavior == other.textHeightBehavior &&
    minWidth == other.minWidth &&
    maxWidth == other.maxWidth;