From 592fc5a0e8666f4b29ba7f49cbf027a7d525ba69 Mon Sep 17 00:00:00 2001
From: Matt Brubeck <mbrubeck@limpet.net>
Date: Tue, 20 Oct 2020 15:16:26 -0700
Subject: [PATCH] Add SmallVec::append method

Fixes #236.
---
 src/lib.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 8db5fa2..8f4ba72 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -771,6 +771,24 @@ impl<A: Array> SmallVec<A> {
         }
     }
 
+    /// Moves all the elements of `other` into `self`, leaving `other` empty.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// # use smallvec::{SmallVec, smallvec};
+    /// let mut v0: SmallVec<[u8; 16]> = smallvec![1, 2, 3];
+    /// let mut v1: SmallVec<[u8; 32]> = smallvec![4, 5, 6];
+    /// v0.append(&mut v1);
+    /// assert_eq!(*v0, [1, 2, 3, 4, 5, 6]);
+    /// assert_eq!(*v1, []);
+    /// ```
+    pub fn append<B>(&mut self, other: &mut SmallVec<B>)
+    where B: Array<Item = A::Item>
+    {
+        self.extend(other.drain(..))
+    }
+
     /// Re-allocate to set the capacity to `max(new_cap, inline_size())`.
     ///
     /// Panics if `new_cap` is less than the vector's length