Dear colleagues,
In swift we are able to add extension of classes that allows us to add
methods but we cannot add attributes, properties. C# language allows
developers to make its *classes *partial*. It is possible to split the
definition of class, struct or interface over two or more source files*.
Could we make swift able to do this stuff ?
*Are you interested about this kind of feature ?*
Proposed solution
Add partial keyword to alert the compiler that this class is splited over
one or more source files.
*Example*
// Common logic for bank model
partial class Bank {
var amount: Int
init() {
amount = 0
super.init()
}
func withdraw(amount amount: Int) {
self.amount -= amount
}
}
// Business logic for customer within bank model
partial class Bank {
unowned let owner: Customer
init(customer: Customer) {
self.owner = customer
}
func notifyCustomer() {
// some code
}
}
<https://github.com/djnivek/swift-evolution/blob/56929274a31ff58295841a74a1eb2ace9db3e428/proposals/0008-makes-swift-class-struct-definitions-partial.md#alternative-solution>Alternative
solution
We also could add more feature with the extension paradigm. Adding
properties, attributes and more directly on the *extension scope*.
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