Add literal 'null', 'true' and 'false' consts to RawValue struct.

[bheylin]

I have been using RawValue a lot lately to implement server endpoints that accept large JSON objects, extract some specific fields and ultimately save the entire JSON to the DB.

As part of this process, a proc-macro based JSON pre-processor is used to automate HTTP error responses. This also uses RawValue to avoid allocating when traversing unknown JSON data.

The pre-processor uses literal "null"'s as part of it's logic, and at the moment I'm deserializing a literal "null" string to RawValue every time I need one.

This could be done once and stored in a LazyLock or something similar, but I thought that adding literal values to the RawValue struct is the least complex solution.

What do you think?

[dtolnay]

Thanks!

[dtolnay]

Published in serde_json 1.0.134.

I was waiting to publish this because I was not happy with how rustdoc originally rendered these. rust-lang/rust#134321

[bheylin]

No worries, there's no rush on a release for me.

I didn't realize that Rustdoc rendered each impl literally.