Merge pull request #54 from AndersTrier/AndersTrier/engines_copy

Engines: derive Copy

src/engine/engine_avx2.rs

@@ -19,7 +19,7 @@ use crate::engine::{
 /// [`NoSimd`] but takes advantage of the x86 AVX2 SIMD instructions.
 ///
 /// [`NoSimd`]: crate::engine::NoSimd
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub struct Avx2 {
     mul128: &'static Mul128,
     skew: &'static Skew,

src/engine/engine_naive.rs

@@ -12,7 +12,7 @@ use crate::engine::{
 ///   the source code to understand [`Engine`].
 /// - [`Naive`] also includes some debug assertions
 ///   which are not present in other implementations.
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub struct Naive {
     exp: &'static Exp,
     log: &'static Log,

src/engine/engine_neon.rs

@@ -14,7 +14,7 @@ use std::iter::zip;
 /// [`NoSimd`] but takes advantage of the Arm Neon SIMD instructions.
 ///
 /// [`NoSimd`]: crate::engine::NoSimd
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub struct Neon {
     mul128: &'static Mul128,
     skew: &'static Skew,

src/engine/engine_nosimd.rs

@@ -11,7 +11,7 @@ use crate::engine::{
 /// Optimized [`Engine`] without SIMD.
 ///
 /// [`NoSimd`] is a basic optimized engine which works on all CPUs.
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub struct NoSimd {
     mul16: &'static Mul16,
     skew: &'static Skew,

src/engine/engine_ssse3.rs

@@ -19,7 +19,7 @@ use crate::engine::{
 /// [`NoSimd`] but takes advantage of the x86 SSSE3 SIMD instructions.
 ///
 /// [`NoSimd`]: crate::engine::NoSimd
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub struct Ssse3 {
     mul128: &'static Mul128,
     skew: &'static Skew,