Customizing deserialization of uint64_t

[chfast]

Is there a way to customize how built-in types like uint64_t are deserialized by the library? I have a JSON schema where some numeric values are serialized as a string with hex-encoded value, e.g. "0x8000000000000001". I want to make j.get<uint64_t>() to work for these too.

[nlohmann]

No, this is currently not possible.

[chfast]

Can this be done by defining my own serializer as described in https://json.nlohmann.me/features/arbitrary_types/#can-i-write-my-own-serializer-advanced-use ?