EqualPartialInverse

Constructs an Equal[(A, B)] given an Equal[A] and Equal[B] by first comparing the A values for equality and then comparing the B values for equality, if necessary.

Constructs an Equal[C] given an Equal[A], an Equal[B] and a function f to transform a C value into an (A, B). The instance will convert each C value into an (A, B), compare the A values for equality, and then compare the B values for equality if necessary.

Constructs an Equal[B] given an Equal[A] and a function f to transform a B value into an A value. The instance will convert each B value into an A and the compare the A values for equality.

Constructs an Equal[Either[A, B]] given an Equal[A] and an Equal[B]. The instance will compare the Either[A, B] values and if both are Right or Left compare them for equality.

Constructs an Equal[C] given an Equal[A], an Equal[B], and a function f to transform a C value into an Either[A, B]. The instance will convert each C value into an Either[A, B] and then if both are Right or Left compare them for equality.

Returns whether two values of type A are equal.

Returns whether two values of type A are not equal.

The identity element.