Create ByteBuf with MutByteBuf::with_capacity

src/buf/byte.rs

@@ -22,16 +22,11 @@ pub struct ByteBuf {
 impl ByteBuf {
     /// Create a new `ByteBuf` by copying the contents of the given slice.
     pub fn from_slice(bytes: &[u8]) -> ByteBuf {
-        let mut buf = ByteBuf::mut_with_capacity(bytes.len());
+        let mut buf = MutByteBuf::with_capacity(bytes.len());
         buf.write_slice(bytes);
         buf.flip()
     }
 
-    pub fn mut_with_capacity(capacity: usize) -> MutByteBuf {
-        assert!(capacity <= MAX_CAPACITY);
-        MutByteBuf { buf: ByteBuf::new(capacity as u32) }
-    }
-
     pub unsafe fn from_mem_ref(mem: alloc::MemRef, cap: u32, pos: u32, lim: u32) -> ByteBuf {
         debug_assert!(pos <= lim && lim <= cap, "invalid arguments; cap={}; pos={}; lim={}", cap, pos, lim);
 
@@ -180,6 +175,11 @@ pub struct MutByteBuf {
 }
 
 impl MutByteBuf {
+    pub fn with_capacity(capacity: usize) -> MutByteBuf {
+        assert!(capacity <= MAX_CAPACITY);
+        MutByteBuf { buf: ByteBuf::new(capacity as u32) }
+    }
+
     pub fn capacity(&self) -> usize {
         self.buf.capacity() as usize
     }