String: add StringView, similar to VecView

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added `VecView`, the `!Sized` version of `Vec`.
 - Added pool implementations for 64-bit architectures.
 - Added `IntoIterator` implementation for `LinearMap`
+- Added `StringView`, the `!Sized` version of `String`.
 
 ### Changed
 

src/ser.rs

@@ -1,8 +1,8 @@
 use core::hash::{BuildHasher, Hash};
 
 use crate::{
-    binary_heap::Kind as BinaryHeapKind, BinaryHeap, Deque, IndexMap, IndexSet, LinearMap, String,
-    Vec,
+    binary_heap::Kind as BinaryHeapKind, string::StringView, BinaryHeap, Deque, IndexMap, IndexSet,
+    LinearMap, String, Vec,
 };
 use serde::ser::{Serialize, SerializeMap, SerializeSeq, Serializer};
 
@@ -113,6 +113,15 @@ where
 
 // String containers
 
+impl Serialize for StringView {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(&*self)
+    }
+}
+
 impl<const N: usize> Serialize for String<N> {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where