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# Description In the PR #13832 I used some newtypes for the old IDs. `SpanId` and `RegId` already used newtypes, to streamline the code, I made them into the same style as the other marker-based IDs. Since `RegId` should be a bit smaller (it uses a `u32` instead of `usize`) according to @devyn, I made the `Id` type generic with `usize` as the default inner value. The question still stands how `Display` should be implemented if even. # User-Facing Changes Users of the internal values of `RegId` or `SpanId` have breaking changes but who outside nushell itself even uses these? # After Submitting The IDs will be streamlined and all type-safe. |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.