rune VS json

A Lisp, a weird dialect of Lisp, is not better than Lua. Why use Rune [0]?!

[0]: https://rune-rs.github.io/

This is what I based my comment on - https://github.com/rune-rs/rune/issues/444

Late start today as well. I really thought today would be the day that I'd have to abandon my goal of no heap allocations. But, luckily I had an arena allocator available that I could fairly easily adapt to store data on the stack. And with some tweaks we have today's solution:

I'd have given you bonus points for using a rust styled scripting language like rune but that's pretty neat still

As note about using rust syntax for scripting: https://rune-rs.github.io/

I know you said you don’t want to embed another language but IMO Rune is worth a consideration here. It can be a pretty thin abstraction over rust by passing native structs to scripts and calling methods on them. The syntax and semantics are very close to rust so it feels natural. https://github.com/rune-rs/rune

The biggest technical difference I'd say is that Rune uses a stack-based machine which makes adding deep C support somewhat obvious while Rhai performs AST walking to execute scripts.

Oh wow. So serde_json doesn't roundtrip floats by default, it uses some imprecise faster algorithm https://github.com/serde-rs/json/issues/707

Good thing there's msgpack I guess.

tokio / hyper / toml / serde / serde_json / json5 / console

Serde JSON, an extension of the serde crate that enables the serialization and deserialization of Rust structs.

To serialize and deserialize data, we'll employ the popular serde crate along with serde_json. This will allow us to easily convert between Rust types and JSON when working with API requests and responses. For async operations we'll use the Rust futures crate.

From the Cargo.toml file above, we can see that the Perseus version at the time of publication is 0.4.2 and has the following dependencies that are common to both the engine side (server-side) and client side of a Perseus application: sycamore, serde, and serde_json.

serde_json

Number parsing uses a fairly naive but uses a lossless algorithm in musli-json. In serde_json they use a fork of lexical I haven't wrapped my head around. I wanted something simple to start with.

Your best best would be to use an enum. Either your own or something like the one from serde_json depending on what you are trying to do.

Don't do that if you care about memory usage. In your toy program, I wouldn't be surprised if memory usage was a lot better if you used Box instead. (even if it doesn't look like it, you can handle almost all the use cases of serde_json::Value with it, often not much less convenient)