CODEWITHSUNDEEP
swiftswift-protocols
Hariharasudhan Duraisamy
Hariharasudhan Duraisamy

Reputation: 23

Can i pass protocol type to generic class

I have a protocol A and there are multiple structs conforming to protocol A. I need to store different struct objects in a collection. But my collection type is predefined by another service, which is of type - class Storage<Value:Codable>. I can't pass in Value type as A, and it throws an error saying Protocol A does not conform to type Decodable. I just want to know if this is a right approach passing a custom protocol and can i make a custom protocol conform to Codable Protocol. Sample code snippet.

Any thoughts would be helpful

class Storage<Value: Codable>{}

protocol A {}

struct Type1: A, Codable, Equatable, Comparable {}
struct Type2: A, Codable, Equatable, Comparable {}

let storage = Storage<A>() // Throws error - Type 'A' does not conform to protocol 'Decodable'

Upvotes: 0

Views: 96

Answers (1)

Kstin
Kstin

Reputation: 679

use basic class

class Storage<Value: Codable>{}

protocol A {}

class Type: A, Codable {}
class Type1: Type, Equatable, Comparable {}
class Type2: Type, Equatable, Comparable {}

let storage = Storage<Type>()

Upvotes: 1

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