Compatibility: optional write Longs without quotes

[ChrisMuki]

I have a issue that i need to write a client for an existing server app that expects long as numeric values, not quoted as string and also no decimal point.

I know that this is an extension/deviation to the JSON spec.

I already thought about a workaround to put my long values into a case class with custom reader and writer and modifying the result of write with a regex.

But is there a way to do this without workarounds?
A feature to enable selectively?

Otherwise i would need to switch to jackson or apply my "workaround"

[plokhotnyuk]

More efficient way to handle your challenge is adding to the scope of derivation macros a custom writer like this