Checklist
Problem
When a single type has a lot of dependencies, the registration gets long and repetitive, and is fragile to changing the init:
Service(.transient, FooProtocol.self) { r in
Foo(
bar: r.resolve(),
baz: r.resolve(),
qux: r.resolve(),
// ...
)
}Feature Request
As of Swift 5.9 (Xcode 15), we can add an overload like this:
#if swift(>=5.9)
extension Service {
@available(swift 5.9)
public init<TRegistration, each TDependency>(
_ scope: Scope,
_ type: TRegistration.Type,
name: String? = nil,
_ callback: @escaping (repeat each TDependency) -> TRegistration
) {
self.init(scope, type, name: name) { (r: Resolver) in
callback(repeat r.resolve((each TDependency).self))
}
}
}
#endifeach TDependency represents a "parameter pack"; the number of generic arguments to this initializer is variable. With this overload, one can say:
Service(.transient, FooProtocol.self, Foo.init)
I tested this locally and it works without confusing the compiler on existing registrations. However, I tested this on Linux, so I had to disable everything related to SwiftUI/Combine. I don't have a Mac to test those parts myself.
Value
The Factory.register blocks would become shorter, making them easier to read and write. Most callbacks passed to the Service are just an initializer.
Something similar could be done for MultitypeService.
Checklist
Problem
When a single type has a lot of dependencies, the registration gets long and repetitive, and is fragile to changing the init:
Feature Request
As of Swift 5.9 (Xcode 15), we can add an overload like this:
each TDependencyrepresents a "parameter pack"; the number of generic arguments to this initializer is variable. With this overload, one can say:I tested this locally and it works without confusing the compiler on existing registrations. However, I tested this on Linux, so I had to disable everything related to SwiftUI/Combine. I don't have a Mac to test those parts myself.
Value
The
Factory.registerblocks would become shorter, making them easier to read and write. Most callbacks passed to theServiceare just an initializer.Something similar could be done for
MultitypeService.