Feature request: method properties() and reverse() on Node

[pchampin]

These method would produce an iterator over (Reference, Indexed<Object>) pairs, or something similar.

I am working on the JSON-LD parser for Sophia, and I need to inspect the output for expand to produce RDF quads. I could convert it to a JsonValue, but that would introduce an unnecessary overhead, IMO.

Or am I missing something?

[timothee-haudebourg]

I think you are not missing anything. I've been so focused on the general design of the library I've neglected the actual API it seems. I should release a new version soon with the changes made in the generic-json branch. I'll try to furnish the API with this kind of methods.

[timothee-haudebourg]

I've released version 0.5.0 which includes the two methods Node::properties and reverse_properties that should do what you need, along with some other useful methods.

Beware that I also moved away from the json crate. The JSON type is now a type parameter. It can theoretically be any JSON type as long as it implements the generic_json::Json trait, but for now only the ijson::IValue type does, which can be parsed using serde_json. I plan to add support for serde_json::Value as soon as possible.

[pchampin]

I tried to do the switch, but it created a subdependency on cc-traits 0.7.0 which needs the unstable toolchain (#![feature(generic_associated_types)]).

Is this dependency unavoidable?? As much as I would love to use GATs myself, I prefer to keep Sophia on the stable channel... :-/

[timothee-haudebourg]

I'm afraid it wont be avoidable for a little while even if I don't like it either. I need two unstable features: generic_associated_types and trait_alias. GAT were supposed to be stabilized soon, I guess there are still some details to figure out. I'm a little bit more worried about trait aliases. Those are required to make the JSON abstraction layer work, but sadly it seems it won't be stabilized soon...

If you really need it and absolutely want to avoid unstable features, I can try to release a 0.4.1 version with those methods, if crates.io will let me.

[timothee-haudebourg]

I'm currently thinking about getting rid of the trait_alias feature. If I can pull that off, then we'll just have to wait until GATs are stabilized (which should happen soon) and json-ld will be usable with stable Rust.

[pchampin]

Thanks for the feedback. Yes, I would prefer to keep Sophia on the stable channel, but I guess I can wait until GATs are stabilized to further integrate json-ld. Anyway, I don't have much time for progressing right now... :-/