From 2e4cc0b443a4aa63b7faf5304e267fa0bad66a88 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Fri, 15 Jul 2016 00:58:48 -0700
Subject: [PATCH] Restore serialize_seq_fixed_size

---
 serde/src/ser/mod.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/serde/src/ser/mod.rs b/serde/src/ser/mod.rs
index 855d914b..a8cc930f 100644
--- a/serde/src/ser/mod.rs
+++ b/serde/src/ser/mod.rs
@@ -214,6 +214,15 @@ pub trait Serializer {
         state: Self::SeqState,
     ) -> Result<(), Self::Error>;
 
+    /// Begins to serialize a sequence whose length will be known at
+    /// deserialization time. This call must be followed by zero or more calls
+    /// to `serialize_seq_elt`, then a call to `serialize_seq_end`. A reasonable
+    /// implementation would be to forward to `serialize_seq`.
+    fn serialize_seq_fixed_size(
+        &mut self,
+        size: usize,
+    ) -> Result<Self::SeqState, Self::Error>;
+
     /// Begins to serialize a tuple. This call must be followed by zero or more
     /// calls to `serialize_tuple_elt`, then a call to `serialize_tuple_end`. A
     /// reasonable implementation would be to forward to `serialize_seq`.