[swift-evolution] [proposal] default func ==(_:_:)
Jan E. Schotsman
jeschot at xs4all.nl
Wed Jan 27 02:40:43 CST 2016
Feature name - provide default func ==(_:_:) for types declared
Author: Jan E.Schotsman
If all of a type's stored properties are Equatable it makes sense for
Swift to provide a default equality implementation.
In a project where many large types are defined that need to be
Equatable it gets cumbersome to write explicit equality functions for
If a type is declared Equatable, all its stored properties are
Equatable and no func ==(_:_:) is defined by the developer the
compiler will synthetisize a memberwise equality function.
(Recursiveness of this procedure is almost automatic)
Impact on existing code
There is no impact on existing code. Equality functions equal to the
default implementation can simply be removed.
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