Update rule.adoc

rules/S7461/rust/rule.adoc

@@ -1,44 +1,41 @@
-FIXME: add a description
-
-// If you want to factorize the description uncomment the following line and create the file.
-//include::../description.adoc[]
 
 == Why is this an issue?
 
-FIXME: remove the unused optional headers (that are commented out)
-
-//=== What is the potential impact?
-
-== How to fix it
-//== How to fix it in FRAMEWORK NAME
+When a type implements `Borrow<T>`, it should provide consistent behavior between the borrowed and owned values, especially regarding `Eq`, `Ord`, and `Hash`. However, `str` and `[u8]` have different Hash implementations, leading to inconsistent hash values for the same underlying data when accessed through different Borrow implementations. This violates the principle that `hash(x) == hash((x as Borrow<[u8]>).borrow()) == hash((x as Borrow<str>).borrow())` must hold, and can cause issues with hash-based collections and comparisons.
 
 === Code examples
 
 ==== Noncompliant code example
 
-[source,rust,diff-id=1,diff-type=noncompliant]
+[source,rust]
 ----
-FIXME
+use std::borrow::Borrow;
+use std::hash::{Hash, Hasher};
+
+struct ExampleType {
+    data: String,
+}
+
+impl Hash for ExampleType {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.data.hash(state); // Noncompliant: Inconsistent Hash
+    }
+}
+
+impl Borrow<str> for ExampleType {
+    fn borrow(&self) -> &str {
+        &self.data
+    }
+}
+
+impl Borrow<[u8]> for ExampleType {
+    fn borrow(&self) -> &[u8] {
+        self.data.as_bytes()
+    }
+}
 ----
 
-==== Compliant solution
+== Resources
+=== Documentation
 
-[source,rust,diff-id=1,diff-type=compliant]
-----
-FIXME
-----
-
-//=== How does this work?
-
-//=== Pitfalls
-
-//=== Going the extra mile
-
-
-//== Resources
-//=== Documentation
-//=== Articles & blog posts
-//=== Conference presentations
-//=== Standards
-//=== External coding guidelines
-//=== Benchmarks
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#impl_hash_borrow_with_str_and_bytes