Further tidy up codegen and somewhat rework the API

fearless_simd/examples/play.rs

@@ -6,7 +6,7 @@
     reason = "TODO: https://github.com/linebender/fearless_simd/issues/40"
 )]
 
-use fearless_simd::{Level, Simd, SimdBase, WithSimd, dispatch};
+use fearless_simd::{Level, dispatch, prelude::*};
 
 // The WithSimd idea is adapted from pulp but is clunky; we
 // will probably prefer the `dispatch!` macro.

fearless_simd/examples/sigmoid.rs

@@ -6,7 +6,7 @@
     reason = "TODO: https://github.com/linebender/fearless_simd/issues/40"
 )]
 
-use fearless_simd::{Level, Simd, SimdBase, SimdFloat, dispatch};
+use fearless_simd::{Level, dispatch, prelude::*};
 
 #[inline(always)]
 fn sigmoid<S: Simd>(simd: S, x: &[f32], out: &mut [f32]) {

fearless_simd/examples/srgb.rs

@@ -6,7 +6,7 @@
     reason = "TODO: https://github.com/linebender/fearless_simd/issues/40"
 )]
 
-use fearless_simd::{Level, Select, Simd, SimdInto, dispatch, f32x4};
+use fearless_simd::{Level, dispatch, f32x4, prelude::*};
 
 // This block shows how to use safe wrappers for compile-time enforcement
 // of using valid SIMD intrinsics.

fearless_simd/src/generated.rs

@@ -12,7 +12,6 @@
 #![cfg_attr(
     target_arch = "x86_64",
     expect(
-        clippy::should_implement_trait,
         clippy::missing_transmute_annotations,
         clippy::useless_transmute,
         clippy::new_without_default,
@@ -23,7 +22,6 @@
 #![cfg_attr(
     target_arch = "wasm32",
     expect(
-        clippy::should_implement_trait,
         clippy::missing_transmute_annotations,
         clippy::useless_transmute,
         clippy::new_without_default,
@@ -38,7 +36,6 @@
     ),
     expect(
         clippy::missing_safety_doc,
-        clippy::should_implement_trait,
         clippy::missing_transmute_annotations,
         clippy::useless_transmute,
         clippy::new_without_default,
@@ -57,7 +54,7 @@ mod fallback;
 #[cfg(target_arch = "aarch64")]
 mod neon;
 mod ops;
-mod simd_trait;
+pub(crate) mod simd_trait;
 mod simd_types;
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 mod sse4_2;