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This is technically breaking, as reported by the semver check, but nobody would be using the removed type because it's useless / not referenced anywhere.

make diagnostic::Label::new private

This one needs to be public in order for users to implement Diagnostic properly. Users can bring their own errors for Assign and Resolve but they have to implement Diagnostic.

remove NoLeadingSlash struct

Ugh, thank you. Sorry I left that in.

This one needs to be public in order for users to implement Diagnostic properly. Users can bring their own errors for Assign and Resolve but they have to implement Diagnostic.

Ah, interesting, but do we expect users to implement Diagnostic themselves?

I dont necessarily expect it - I doubt anyone is implementing Assign and Resolve for custom languages or data structures - but it is possible and in an effort to facilitate that, the traits were designed so that implementations bring their own error types for resolve::Resolve and assign::Assign.

You know what, you're completely right. I lost track of what those traits were for, it does make sense that people can use jsonptr with their own types. Although, now that I think about it, it also only makes sense for JSON-like data structures.

I'll update this PR and remove that change. Thanks!

it also only makes sense for JSON-like data structures.

So YAML's integer based maps were what I had in mind when I created it. I didn't look to see whether or not serde_yaml supported the structure but figured if a crate ever came along that did, they'd need their own error.

In retrospect, it was likely overkill and have made the errors themselves a bigger pain than needed.

Since you haven't explicitly nacked, and other than the deprecation this is mostly docs changes, I'm going to proceed with merging. 👍