Comments (3)
@ruixingchen
Swift Array is not allowed to use existential type that have associated type to Element.
You can extends the Differentiable
protocol by wrapping it with struct or enum.
e,g.
struct EntityWrapper: Differentiable {
var base: Entity
var id: String { base.id }
...
}
var dataSource: [EntityWrapper] = []
struct A: Entity {...}
struct B: Entity {...}
struct C: Entity {...}
enum EntityVariant: Differentiable {
case a(A)
case b(B)
case c(C)
...
}
var dataSource: [EntityVariant] = []
from differencekit.
@ra1028
thanks, but sadly not working ๐ข
struct EntityWrapper: Differentiable {
var base: Entity //ERROR HERE
var id: String { base.id }
...
}
Xcode says that Protocol 'Entity' can only be used as a generic constraint because it has Self or associated type requirements
I used associatedType in one of my protocol, but then the protocol comes to be nothing, it can only be used as a generic constraint, I cant use it as a TYPE, or put it in an array, at last I remove the associatedType and use Any instead, now the protocol is free and wild ๐
from differencekit.
@ruixingchen
I looked at your sample code and suggested to implement it with wrapper type because Entity can be used as an existential type if the Differentiable
conformance is removed from it.
If the Entity has an associated type for other reasons, I recommend to use the enum that I suggested before.
The further discussion will be about Swift's existential type, and the issue will deviate from "how to use DifferenceKit".
from differencekit.
Related Issues (20)
- Compute changeset in the background
- To do the insert and delete operations at once
- Delete .swift-version
- Crash when I reload collectionView HOT 1
- Help needed with crash - NSInternalInconsistencyException HOT 1
- Buggy default reload method HOT 1
- How can I reload a table that is behind on the navigation stack? HOT 1
- UICollectionView reload animation
- Duplicate items with some edge cases in AppKitExtension HOT 13
- Why DifferenceKit is so much faster than Apple's Foundation diffing? HOT 2
- Animation option for row reloading is not a valid option in AppKitExtension
- Does it work seamlessly when using an UICollectionView with SwiftUI cells? HOT 2
- tvOS UICollectionView.reload crash
- The algorithm cannot get the best diff results๏ผ HOT 1
- `Differentiable` requres `Equatable` AND `Hashable`, but docs say otherwise
- Using only the diffing algorithm
- Invalid batch updates detected
- How to apply ChageSet to an array?
- Use UITableView reconfigureRows and UICollectionView reconfigureItems for ChangeSet.elementUpdated
- How to use DifferenceKit with diffable data sources? HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. ๐๐๐
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google โค๏ธ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from differencekit.