[imtringued]

That sounds like a pretty awful idea. If you're using a C library for parsing JSON then you must add an additional C to Nim/Crystal conversion step that requires additional RAM and CPU time.

[mratsim]

Nim compiles to C, there is no cost in calling C.

[sweeneyrod]

That's not how people use C libraries.

[SolitudeSF]

thats not how it works