From 34827fa4b3f1431a71d57855adfd517bd0c0a374 Mon Sep 17 00:00:00 2001
From: Alejandro Vaz <alejandro.vaz.myt@gmail.com>
Date: Sat, 29 Aug 2026 14:57:05 +0200
Subject: [PATCH] feat: added borsh serialize

---
 Cargo.lock   | 16 ++++++++++++++++
 Cargo.toml   |  1 +
 src/borsh.rs | 15 +++++++++++++++
 src/lib.rs   |  2 ++
 4 files changed, 34 insertions(+)
 create mode 100644 src/borsh.rs

diff --git a/Cargo.lock b/Cargo.lock
index cc011d5..fc87786 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -40,6 +40,15 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "borsh"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "553c5d846a6ba5150c65e3b1b8ec073bcf1abc20f9b7220de384a4443ea4e20a"
+dependencies = [
+ "cfg_aliases",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.3"
@@ -64,6 +73,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+
 [[package]]
 name = "ciborium"
 version = "0.2.2"
@@ -500,6 +515,7 @@ checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
 name = "smallvec"
 version = "2.0.0-alpha.12"
 dependencies = [
+ "borsh",
  "bytes",
  "criterion",
  "malloc_size_of",
diff --git a/Cargo.toml b/Cargo.toml
index 912a2ed..7531d8b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,6 +21,7 @@ serde = ["dep:serde_core"]
 internals = []
 
 [dependencies]
+borsh = { version = "1.8", optional = true, default-features = false }
 bytes = { version = "1", optional = true, default-features = false }
 serde_core = { version = "1.0.221", optional = true, default-features = false }
 malloc_size_of = { version = "0.1.1", optional = true, default-features = false }
diff --git a/src/borsh.rs b/src/borsh.rs
new file mode 100644
index 0000000..10f1dcb
--- /dev/null
+++ b/src/borsh.rs
@@ -0,0 +1,15 @@
+use super::SmallVec;
+use borsh::{
+    io::{Result as Serial, Write},
+    BorshSerialize,
+};
+
+impl<Type: BorshSerialize, const INLINE: usize> BorshSerialize for SmallVec<Type, INLINE> {
+    fn serialize<Writer: Write>(&self, writer: &mut Writer) -> Serial<()> {
+        self.len.0.serialize(writer)?;
+        for element in self {
+            element.serialize(writer)?;
+        }
+        return Ok(());
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 5018c7b..972b740 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -65,6 +65,8 @@ pub extern crate alloc;
 #[cfg(any(test, feature = "std"))]
 extern crate std;
 
+#[cfg(feature = "borsh")]
+mod borsh;
 mod rawsmallvec;
 #[cfg(test)]
 mod tests;