From 49eec236ef01aa2489b72ad23a03cd8a90911768 Mon Sep 17 00:00:00 2001
From: Lynn <lynn@foldr.moe>
Date: Wed, 31 Jan 2024 16:37:45 +0100
Subject: [PATCH 1/2] Implement AsRef for DnaSequence

---
 src/rust_api.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/rust_api.rs b/src/rust_api.rs
index f52f217..3de1555 100644
--- a/src/rust_api.rs
+++ b/src/rust_api.rs
@@ -337,6 +337,12 @@ impl<T: NucleotideLike> FromStr for DnaSequence<T> {
     }
 }
 
+impl<T: NucleotideLike> AsRef<[T]> for DnaSequence<T> {
+    fn as_ref(&self) -> &[T] {
+        self.as_slice()
+    }
+}
+
 impl DnaSequence<Nucleotide> {
     /// Return canonical isomorphic DNA sequence.
     ///

From 7ffbbbdc678015e8b4321b00ef033d0a9363d88e Mon Sep 17 00:00:00 2001
From: Lynn <lynn@foldr.moe>
Date: Wed, 31 Jan 2024 16:43:12 +0100
Subject: [PATCH 2/2] Test AsRef impl

---
 src/rust_api.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/rust_api.rs b/src/rust_api.rs
index 3de1555..6a69cca 100644
--- a/src/rust_api.rs
+++ b/src/rust_api.rs
@@ -784,6 +784,13 @@ mod tests {
         protein(" an  gtnattag \t");
     }
 
+    #[test]
+    fn test_as_ref() {
+        let sequence = dna("ac");
+        let nucleotides: &[NucleotideAmbiguous] = sequence.as_ref();
+        assert!(nucleotides == &[NucleotideAmbiguous::A, NucleotideAmbiguous::C]);
+    }
+
     #[cfg(feature = "serde")]
     #[test]
     fn test_serde_json() {