CODEWITHSUNDEEP
swiftcodable
Jonny
Jonny

Reputation: 2094

What errors can happen when encode with Swift JSONEncoder

JSONEncoder method func encode<T>(_ value: T) throws -> Data where T : Encodable is throwable.

I wonder why is it throwable: If the value to encode is not conform to Encodable, it can't pass compiler checking, so it should encounter no errors at runtime.

Upvotes: 5

Views: 1865

Answers (1)

nathan
nathan

Reputation: 9395

From JSONEncoder's source code:

/// - throws: `EncodingError.invalidValue` if a non-conforming floating-point value is encountered during encoding, and the encoding strategy is `.throw`.
/// - throws: An error if any value throws an error during encoding.


Debug descriptions for all errors:

Top-level (T.self) did not encode any values.

Top-level (T.self) encoded as null JSON fragment.

Top-level (T.self) encoded as number JSON fragment.

Top-level (T.self) encoded as string JSON fragment.

Upvotes: 7

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