Use const generics for array.rs

tls_codec/Readme.md

@@ -3,6 +3,7 @@
 ![MIT licensed][license-image]
 [![Project Chat][chat-image]][chat-link]
 [![][tls_codec-ci]][tls_codec-ci-link]
+![Rust Version][rustc-image]
 
 |                                        | crates.io                                      | docs.rs                                                      |
 | -------------------------------------- | ---------------------------------------------- | ------------------------------------------------------------ |
@@ -49,3 +50,4 @@ serialization/deserialization
 [tls_codec_derive-link]: https://crates.io/crates/tls_codec_derive
 [tls_codec_derive_docs]: https://img.shields.io/docsrs/tls_codec_derive/latest?style=for-the-badge
 [tls_codec_derive_docs-link]: https://docs.rs/tls_codec_derive/
+[rustc-image]: https://img.shields.io/badge/rustc-1.51+-blue.svg?style=for-the-badge

tls_codec/src/arrays.rs

@@ -3,43 +3,31 @@
 use super::{Deserialize, Error, Serialize, Size};
 use std::io::{Read, Write};
 
-macro_rules! impl_array {
-    ($($len:literal),*) => {
-        $(
-            impl Serialize for [u8; $len] {
-                fn tls_serialize<W: Write>(&self, writer: &mut W) -> Result<usize, Error> {
-                    let written = writer.write(self)?;
-                    if written == $len {
-                        Ok(written)
-                    } else {
-                        Err(Error::InvalidWriteLength(format!("Expected to write {} bytes but only {} were written.", $len, written)))
-                    }
-                }
-            }
-
-            impl Deserialize for [u8; $len] {
-                fn tls_deserialize<R: Read>(bytes: &mut R) -> Result<Self, Error> {
-                    let mut out = [0u8; $len];
-                    bytes.read_exact(&mut out)?;
-                    Ok(out)
-                }
-            }
+impl<const LEN: usize> Serialize for [u8; LEN] {
+    fn tls_serialize<W: Write>(&self, writer: &mut W) -> Result<usize, Error> {
+        let written = writer.write(self)?;
+        if written == LEN {
+            Ok(written)
+        } else {
+            Err(Error::InvalidWriteLength(format!(
+                "Expected to write {} bytes but only {} were written.",
+                LEN, written
+            )))
+        }
+    }
+}
 
-            impl Size for [u8; $len] {
-                #[inline]
-                fn tls_serialized_len(&self) -> usize {
-                    $len
-                }
-            }
-        )*
-    };
+impl<const LEN: usize> Deserialize for [u8; LEN] {
+    fn tls_deserialize<R: Read>(bytes: &mut R) -> Result<Self, Error> {
+        let mut out = [0u8; LEN];
+        bytes.read_exact(&mut out)?;
+        Ok(out)
+    }
 }
 
-impl_array!(
-    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, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
-    51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74,
-    75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98,
-    99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117,
-    118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128
-);
+impl<const LEN: usize> Size for [u8; LEN] {
+    #[inline]
+    fn tls_serialized_len(&self) -> usize {
+        LEN
+    }
+}