From 25d110f8fe6c787d3e2597c9017dd05fe904de83 Mon Sep 17 00:00:00 2001
From: David Koloski <djkoloski@gmail.com>
Date: Mon, 29 Nov 2021 13:32:01 -0500
Subject: [PATCH] Add serialize method that takes a supplied vec

---
 src/ser/mod.rs     | 12 ++++++++++++
 src/ser/raw/mod.rs |  7 ++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/ser/mod.rs b/src/ser/mod.rs
index a15065e8..ff59340d 100644
--- a/src/ser/mod.rs
+++ b/src/ser/mod.rs
@@ -283,6 +283,18 @@ where
     Ok(serializer.into_vec())
 }
 
+/// Serialize the given `T` as a BSON byte vector into the provided `Vec`.
+#[inline]
+pub fn into_vec<T>(value: &T, vec: Vec<u8>) -> Result<Vec<u8>>
+where
+    T: Serialize,
+{
+    let mut serializer = raw::Serializer::with_vec(vec);
+    value.serialize(&mut serializer)?;
+    Ok(serializer.into_vec())
+}
+
+
 /// Serialize the given `T` as a [`RawDocumentBuf`].
 ///
 /// ```rust
diff --git a/src/ser/raw/mod.rs b/src/ser/raw/mod.rs
index 960c5a46..41f062f3 100644
--- a/src/ser/raw/mod.rs
+++ b/src/ser/raw/mod.rs
@@ -56,8 +56,13 @@ impl SerializerHint {
 
 impl Serializer {
     pub(crate) fn new() -> Self {
+        Self::with_vec(Vec::new())
+    }
+
+    pub(crate) fn with_vec(mut bytes: Vec<u8>) -> Self {
+        bytes.clear();
         Self {
-            bytes: Vec::new(),
+            bytes,
             type_index: 0,
             hint: SerializerHint::None,
         }