clippy: add clippy to Cargo.toml (#27)

* clippy: add clippy to Cargo.toml

* fix clippy

* fix clippy with latest nightly

Cargo.toml

@@ -12,6 +12,24 @@ homepage = "https://github.com/alloy-rs/rlp"
 repository = "https://github.com/alloy-rs/rlp"
 exclude = ["benches/", "tests/"]
 
+[workspace.lints.rust]
+missing-debug-implementations = "warn"
+missing-docs = "warn"
+unreachable-pub = "warn"
+unused-must-use = "deny"
+rust-2018-idioms = "deny"
+unnameable-types = "warn"
+
+[workspace.lints.rustdoc]
+all = "warn"
+
+[workspace.lints.clippy]
+all = { level = "warn", priority = -1 }
+missing-const-for-fn = "warn"
+use-self = "warn"
+option-if-let-else = "warn"
+redundant-clone = "warn"
+
 [workspace.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]

crates/rlp-derive/Cargo.toml

@@ -13,6 +13,9 @@ license.workspace = true
 repository.workspace = true
 exclude.workspace = true
 
+[lints]
+workspace = true
+
 [lib]
 proc-macro = true
 

crates/rlp-derive/src/lib.rs

@@ -3,18 +3,14 @@
     html_logo_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/alloy.jpg",
     html_favicon_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/favicon.ico"
 )]
-#![warn(missing_docs, unreachable_pub, rustdoc::all)]
-#![deny(unused_must_use, unused_crate_dependencies)]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 
-extern crate proc_macro;
-
 mod de;
 mod en;
 mod utils;
 
-use de::*;
-use en::*;
+use de::{impl_decodable, impl_decodable_wrapper};
+use en::{impl_encodable, impl_encodable_wrapper, impl_max_encoded_len};
 use proc_macro::TokenStream;
 
 /// Derives `Encodable` for the type which encodes the all fields as list:

crates/rlp-derive/src/utils.rs

@@ -22,7 +22,7 @@ pub(crate) fn parse_struct<'a>(
 }
 
 pub(crate) fn attributes_include(attrs: &[Attribute], attr_name: &str) -> bool {
-    for attr in attrs.iter() {
+    for attr in attrs {
         if attr.path().is_ident("rlp") {
             if let Meta::List(meta) = &attr.meta {
                 let mut is_attr = false;
@@ -51,12 +51,13 @@ pub(crate) fn is_optional(field: &Field) -> bool {
 }
 
 pub(crate) fn field_ident(index: usize, field: &syn::Field) -> TokenStream {
-    if let Some(ident) = &field.ident {
-        quote! { #ident }
-    } else {
-        let index = syn::Index::from(index);
-        quote! { #index }
-    }
+    field.ident.as_ref().map_or_else(
+        || {
+            let index = syn::Index::from(index);
+            quote! { #index }
+        },
+        |ident| quote! { #ident },
+    )
 }
 
 pub(crate) fn make_generics(generics: &Generics, trait_name: TokenStream) -> Generics {

crates/rlp/Cargo.toml

@@ -13,6 +13,9 @@ license.workspace = true
 repository.workspace = true
 exclude.workspace = true
 
+[lints]
+workspace = true
+
 [package.metadata.docs.rs]
 all-features = true
 rustdoc-args = ["--cfg", "docsrs"]

crates/rlp/src/decode.rs

@@ -10,6 +10,7 @@ pub trait Decodable: Sized {
 }
 
 /// An active RLP decoder, with a specific slice of a payload.
+#[derive(Debug)]
 pub struct Rlp<'a> {
     payload_view: &'a [u8],
 }
@@ -254,11 +255,10 @@ mod tests {
                 expected,
                 "input: {}{}",
                 hex::encode(orig),
-                if let Ok(expected) = &expected {
-                    format!("; expected: {}", hex::encode(crate::encode(expected)))
-                } else {
-                    String::new()
-                }
+                expected.as_ref().map_or_else(
+                    |_| String::new(),
+                    |expected| format!("; expected: {}", hex::encode(crate::encode(expected)))
+                )
             );
 
             if expected.is_ok() {

crates/rlp/src/header.rs

@@ -135,7 +135,7 @@ impl Header {
             payload.advance(rlp_length);
         }
 
-        return Ok(PayloadView::List(items));
+        Ok(PayloadView::List(items))
     }
 
     /// Encodes the header into the `out` buffer.
@@ -161,6 +161,7 @@ impl Header {
 }
 
 /// Structured representation of an RLP payload.
+#[derive(Debug)]
 pub enum PayloadView<'a> {
     /// Payload is a byte string.
     String(&'a [u8]),

crates/rlp/src/lib.rs

@@ -3,14 +3,6 @@
     html_logo_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/alloy.jpg",
     html_favicon_url = "https://raw.githubusercontent.com/alloy-rs/core/main/assets/favicon.ico"
 )]
-#![warn(
-    missing_docs,
-    unreachable_pub,
-    unused_crate_dependencies,
-    clippy::missing_const_for_fn,
-    rustdoc::all
-)]
-#![deny(unused_must_use, rust_2018_idioms)]
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 

crates/rlp/tests/derive.rs

@@ -1,3 +1,5 @@
+//! Tests for the derive macros.
+
 #![cfg(feature = "derive")]
 #![allow(dead_code)]
 
@@ -21,7 +23,7 @@ fn simple_derive() {
 }
 
 #[test]
-fn wrapper() {
+const fn wrapper() {
     #[derive(RlpEncodableWrapper, RlpDecodableWrapper, RlpMaxEncodedLen, PartialEq, Debug)]
     struct Wrapper([u8; 8]);
 
@@ -30,7 +32,7 @@ fn wrapper() {
 }
 
 #[test]
-fn generics() {
+const fn generics() {
     trait LT<'a> {}
 
     #[derive(RlpEncodable, RlpDecodable, RlpMaxEncodedLen)]
@@ -45,7 +47,7 @@ fn generics() {
 }
 
 #[test]
-fn opt() {
+const fn opt() {
     #[derive(RlpEncodable, RlpDecodable)]
     #[rlp(trailing)]
     struct Options<T>(Option<Vec<T>>);

examples/enum.rs

@@ -1,3 +1,6 @@
+//! This example demonstrates how to encode and decode an enum using
+//! `alloy_rlp`.
+
 use alloy_rlp::{encode, encode_list, Decodable, Encodable, Error, Header};
 use bytes::BufMut;