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14 changes: 13 additions & 1 deletion src/rustdoc-json-types/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -188,7 +188,19 @@ pub enum TypeBindingKind {
Constraint(Vec<GenericBound>),
}

#[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
/// An opaque identifier for an item.
///
/// It can be used to lookup in [Crate::index] or [Crate::paths] to resolve it
/// to an [Item].
///
/// Id's are only valid within a single JSON blob. They cannot be used to
/// resolve references between the JSON output's for different crates.
///
/// Rustdoc makes no guarantees about the inner value of Id's. Applications
/// should treat them as opaque keys to lookup items, and avoid attempting
/// to parse them, or otherwise depend on any implementation details.
#[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
// FIXME(aDotInTheVoid): Consider making this non-public in rustdoc-types.
pub struct Id(pub String);

#[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
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