Trying to derive a class type = JSONDecoder from a string

Question

joe@softwareops.com OP

Created Aug ’20

Replies 2

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Participants 2

I get a compiler error at the live below. I have tried other combinations as well.

Code Block let decoder = JSONDecoder()
if let className = transation.name,
						let newClass = Bundle.main.classNamed(className) 
	{
		let object = try decoder.decode(type(of: newClass.self), from: decompressedData)	<==== Type of expression is ambiguous without more context
	}

Or

Code Block let object = try decoder.decode(newClass.self, from: decompressedData) <==== Type of expression is ambiguous without more context

Is what I want to do possible?

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Answer 1

OOPer OP

Aug ’20

Is what I want to do possible?

NO.
Decodable is based on the static type system. Swift compiler needs to know the type at compile-time.
Any attempt to use some dynamic type will fail.

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Answer 2

joe@softwareops.com OP

Aug ’20

Got it. And thanks for the clarification.

0