DefaultImplementationsSection

A section that contains default implementations of a protocol-requirement, for example a property or a method.

struct DefaultImplementationsSection

Discussion

Protocol extensions might provide a default implementation of a required property or a method, that can optionally be available under certain conditions.

For example the AdditiveArithmetic protocol from the Swift Standard Library requires conforming types to have the notion of zero through a requirement of a static-property member called zero. However, if your type conforming to AdditiveArithmetic represents an integer and adopts ExpressibleByIntegerLiteral it will get a default zero implementation, because the standard library knows how to represent zero in integer arithmetic.

To aid documentation discoverability, DefaultImplementationsSection lists all default implementations of a certain requirement, grouped by the type that provides the implementations.