Move bytes implementation into a submodule in abstractions

src/text/abstraction.rs

@@ -1,6 +1,3 @@
-#[cfg(feature = "bytes")]
-use bstr::ByteSlice;
-
 use std::borrow::Cow;
 use std::hash::Hash;
 use std::ops::Range;
@@ -47,15 +44,6 @@ impl<'a, T: DiffableStr + ?Sized> DiffableStrRef for Cow<'a, T> {
     }
 }
 
-#[cfg(feature = "bytes")]
-impl DiffableStrRef for Vec<u8> {
-    type Output = [u8];
-
-    fn as_diffable_str(&self) -> &[u8] {
-        self.as_slice()
-    }
-}
-
 /// All supported diffable strings.
 ///
 /// The text module can work with different types of strings depending
@@ -221,10 +209,23 @@ impl DiffableStr for str {
     }
 }
 
+#[cfg(feature = "bytes")]
+mod bytes_support {
+    use super::*;
+
+    use bstr::ByteSlice;
+
+    impl DiffableStrRef for Vec<u8> {
+        type Output = [u8];
+
+        fn as_diffable_str(&self) -> &[u8] {
+            self.as_slice()
+        }
+    }
+
     /// Allows viewing ASCII compatible byte slices as strings.
     ///
     /// Requires the `bytes` feature.
-#[cfg(feature = "bytes")]
     impl DiffableStr for [u8] {
         fn tokenize_lines(&self) -> Vec<&Self> {
             let mut iter = self.char_indices().peekable();
@@ -332,6 +333,7 @@ impl DiffableStr for [u8] {
             self
         }
     }
+}
 
 #[test]
 fn test_split_lines() {