Add non mut spare_capacity().

jaamesd · jaamesd · commit 818ba561ee0c · 2025-09-08T05:48:44.000-07:00
diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
@@ -1117,6 +1117,11 @@ impl BytesMut {
             slice::from_raw_parts_mut(ptr.cast(), len)
         }
     }
+    /// Returns the remaining spare capacity of the buffer.
+    #[inline]
+    pub fn spare_capacity(&self) -> usize {
+        self.cap - self.len
+    }
 }
 
 impl Drop for BytesMut {

Original file line number	Diff line number	Diff line change
`@@ -1117,6 +1117,11 @@ impl BytesMut {`
`1117`	`1117`	`slice::from_raw_parts_mut(ptr.cast(), len)`
`1118`	`1118`	`}`
`1119`	`1119`	`}`
	`1120`	`+ /// Returns the remaining spare capacity of the buffer.`
	`1121`	`+ #[inline]`
	`1122`	`+ pub fn spare_capacity(&self) -> usize {`
	`1123`	`+ self.cap - self.len`
	`1124`	`+ }`
`1120`	`1125`	`}`
`1121`	`1126`
`1122`	`1127`	`impl Drop for BytesMut {`