Customization lambda for Json.ignoreUnknownKeys

[kunyavskiy]

What is your use-case and why do you need this feature?

We have a config file, which is json. On the one side, I want to disable unknown keys so that one can receive an error when they mistyped the config key. On the other side, this would disallow something like #comment key in the config, which can be quite useful.

Describe the solution you'd like

I suggest adding something like JsonConfiguration.isAllowedUnknowKey: (String, SerialDescriptor) -> Unit, where end-user can decide if this unknown key is fine or not.

[qwwdfsad]

On the other side, this would disallow something like #comment key in the config, which can be quite useful.

Isn't it the case that something like Json5 support is what would be nicer here?

[kunyavskiy]

That sounds even better but much harder. Do you have any plans on json5 support? Or do you recommend community-driven formatted as good enough?

[qwwdfsad]

We are considering it as one of the features in the next major release

[sandwwraith]

I'll close this as a duplicate of #797 then.