[5.7] Fix JSONDecoder superDecoder darwin/linux discrepancy #4631
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* Don't throw DecodingError if superDecoder doesn't exist * Add decoderForKeyNoThrow * Improve JSONDecoder error handling When trying to created a keyed container or unkeyed containter from a null value throw a `DecodingError.valueNotFound` error instead of a `typeMismatch` error. This is more inline with Darwin.
parkera
approved these changes
Sep 12, 2022
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@swift-ci test |
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Is there any reason this hasn't been merged. |
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On Darwin when you call
superDecoderon theJSONDecoderkeyed container and there is no associated value for the key passed in, it returns a new decoder that returns empty containers. On Linux it would throw aDecodingError.keyNotFounderror.This PR resolves this discrepancy by catching the
DecodingError.keyNotFounderror and returning a decoder that references aJSONValue.null.The PR also adds a new test
test_notFoundSuperDecoderto verify this fix.This resolves #3169