What is meant by ensuring certain conditions for objects implementing the Equatable protocol?

The Equatable protocol in Swift requires the implementation of the equality operator (==), which determines when two objects are considered equal. Ensuring certain conditions for objects implementing Equatable means that the operator's implementation should be:

• Reflexive: an object is always equal to itself (a == a).
• Symmetric: if a == b, then b == a.
• Transitive: if a == b and b == c, then a == c.

This guarantees correct and predictable behavior of object comparison. For example, for a Person structure with fields name and age, the == operator should compare these fields to determine equality.