impl Encode for [N; T], where 1 <= N <= 32, T: Encode

Author: burtonageo

src/encode.rs

@@ -63,6 +63,22 @@ unsafe impl Encode for *const c_void {
     const ENCODING: Encoding<'static> = Encoding::Pointer(&Encoding::Void);
 }
 
+// TODO: Replace this with a const generics implementation when they stabilise (#44580)
+macro_rules! slice_encode_impl {
+    ($($n:literal),* $(,)?) => {
+        $(
+            unsafe impl<T: Encode> Encode for [T; $n] {
+                const ENCODING: Encoding<'static> = Encoding::Array($n, &<T as Encode>::ENCODING);
+            }
+        )*
+    };
+}
+
+slice_encode_impl!(
+    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
+    27, 28, 29, 30, 31, 32
+);
+
 /*
 External crates cannot implement Encode for pointers or Optionals, but they
 *can* implement it for references. rust-lang/rust#25126