Add support for diffus

crates/newtype-uuid/Cargo.toml

@@ -18,12 +18,14 @@ all-features = true
 rustdoc-args = ["--cfg=doc_cfg"]
 
 [dependencies]
+diffus = { version = "0.10.0", optional = true, features = ["uuid-impl", "derive"] }
 serde = { version = "1", optional = true, features = ["derive"] }
 schemars = { version = "0.8", features = ["uuid1"], optional = true }
 uuid = { version = "1.7.0", default-features = false }
 
 [features]
 default = ["uuid/default", "std"]
+diffus = ["dep:diffus"]
 std = ["uuid/std", "alloc"]
 alloc = []
 v4 = ["uuid/v4"]

crates/newtype-uuid/README.md

@@ -95,6 +95,7 @@ permits conversions between typed and untyped UUIDs.
 ## Features
 
 - `default`: Enables default features in the newtype-uuid crate.
+- `diffus`: Enables type diff support via [diffus](https://github.com/distil/diffus)
 - `std`: Enables the use of the standard library. *Enabled by default.*
 - `serde`: Enables serialization and deserialization support via Serde. *Not enabled by
   default.*

crates/newtype-uuid/src/lib.rs

@@ -88,6 +88,7 @@
 //! # Features
 //!
 //! - `default`: Enables default features in the newtype-uuid crate.
+//! - `diffus`: Enables type diff support via [diffus](https://github.com/distil/diffus)
 //! - `std`: Enables the use of the standard library. *Enabled by default.*
 //! - `serde`: Enables serialization and deserialization support via Serde. *Not enabled by
 //!   default.*
@@ -367,6 +368,29 @@ mod schemars08_imp {
     }
 }
 
+#[cfg(feature = "diffus")]
+mod diffus_imp {
+    use super::*;
+    use diffus::{edit, Diffable};
+
+    /// Implements `Diffable` for `TypedUuid<T>`, if `T` implements `Diffable`.
+    impl<'a, T> Diffable<'a> for TypedUuid<T>
+    where
+        T: TypedUuidKind + Diffable<'a>,
+    {
+        type Diff = (&'a Self, &'a Self);
+
+        #[inline]
+        fn diff(&'a self, other: &'a Self) -> edit::Edit<'a, Self> {
+            if self.uuid == other.uuid {
+                edit::Edit::Copy(self)
+            } else {
+                edit::Edit::Change((self, other))
+            }
+        }
+    }
+}
+
 /// Represents marker types that can be used as a type parameter for [`TypedUuid`].
 ///
 /// Generally, an implementation of this will be a zero-sized type that can never be constructed. An

scripts/commands.sh

@@ -6,7 +6,7 @@ set -e -o pipefail
 
 CARGO="${CARGO:-cargo}"
 EXCLUDED_FEATURES_BY_DEFAULT=(internal-schemars08-tests)
-EXCLUDED_FEATURES_NO_STD=(schemars08 serde default std alloc v4)
+EXCLUDED_FEATURES_NO_STD=(schemars08 serde default std alloc v4 diffus)
 
 trap 'echo_err "Error occurred at $0 command: $BASH_COMMAND"' ERR
 trap 'echo_err "Exiting $0"' EXIT