URL: http://github.com/simdjson/simdjson/issues/2456
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Suppose that you have a car data structure and you only want to read two of its fields from JSON.
object.extract_into<"make", "model">(car);is very nice and it should be easy work in simdjson 4.0 with reflection.
It is better than having to annotate the car struct.
Reference: #2274 (comment)