feat: derive Allocative on FixedBytes (alloy-rs#531)

* use allocative

* ci: don't run --all-features on MSRV

* feat: add allocative to address

---------

Co-authored-by: DaniPopes <57450786+DaniPopes@users.noreply.github.com>

.github/workflows/ci.yml

@@ -20,8 +20,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: ["stable", "beta", "nightly", "1.65"] # MSRV
+        rust: ["stable", "beta", "nightly"]
         flags: ["--no-default-features", "", "--all-features"]
+        include:
+          - rust: "1.65" # MSRV
+            flags: "--no-default-features"
+          - rust: "1.65" # MSRV
+            flags: ""
+          - rust: "1.65" # MSRV
+            flags: "--features json"
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master

Cargo.toml

@@ -71,3 +71,4 @@ ruint = { version = "1.11.1", default-features = false, features = ["alloc"] }
 ruint-macro = { version = "1", default-features = false }
 winnow = { version = "0.6", default-features = false, features = ["alloc"] }
 postgres-types = "0.2.6"
+allocative = { version = "0.3.2", default-features = false }

crates/primitives/Cargo.toml

@@ -54,6 +54,9 @@ derive_arbitrary = { workspace = true, optional = true }
 proptest = { workspace = true, optional = true }
 proptest-derive = { workspace = true, optional = true }
 
+# allocative
+allocative = { workspace = true, optional = true }
+
 # postgres
 postgres-types = { workspace = true, optional = true }
 
@@ -97,6 +100,7 @@ arbitrary = [
     "ethereum_ssz?/arbitrary",
 ]
 k256 = ["dep:k256"]
+allocative = ["dep:allocative"]
 
 # `const-hex` compatibility feature for `hex`.
 # Should not be needed most of the time.

crates/primitives/src/bits/fixed.rs

@@ -27,6 +27,7 @@ use derive_more::{Deref, DerefMut, From, Index, IndexMut, IntoIterator};
     IntoIterator,
 )]
 #[cfg_attr(feature = "arbitrary", derive(derive_arbitrary::Arbitrary, proptest_derive::Arbitrary))]
+#[cfg_attr(feature = "allocative", derive(allocative::Allocative))]
 #[repr(transparent)]
 pub struct FixedBytes<const N: usize>(#[into_iterator(owned, ref, ref_mut)] pub [u8; N]);
 

crates/primitives/src/bits/macros.rs

@@ -176,6 +176,7 @@ macro_rules! wrap_fixed_bytes {
         $crate::impl_fb_traits!($name, $n);
         $crate::impl_rlp!($name, $n);
         $crate::impl_serde!($name);
+        $crate::impl_allocative!($name);
         $crate::impl_arbitrary!($name, $n);
         $crate::impl_ssz_fixed_len!($name, $n);
         $crate::impl_rand!($name);
@@ -558,6 +559,27 @@ macro_rules! impl_rlp {
     ($t:ty, $n:literal) => {};
 }
 
+#[doc(hidden)]
+#[macro_export]
+#[cfg(feature = "allocative")]
+macro_rules! impl_allocative {
+    ($t:ty) => {
+        impl $crate::private::allocative::Allocative for $t {
+            #[inline]
+            fn visit<'a, 'b: 'a>(&self, visitor: &'a mut $crate::private::allocative::Visitor<'b>) {
+                $crate::private::allocative::Allocative::visit(&self.0, visitor)
+            }
+        }
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+#[cfg(not(feature = "allocative"))]
+macro_rules! impl_allocative {
+    ($t:ty) => {};
+}
+
 #[doc(hidden)]
 #[macro_export]
 #[cfg(feature = "serde")]

crates/primitives/src/lib.rs

@@ -121,6 +121,9 @@ pub mod private {
     #[cfg(feature = "rlp")]
     pub use alloy_rlp;
 
+    #[cfg(feature = "allocative")]
+    pub use allocative;
+
     #[cfg(feature = "ssz")]
     pub use ssz;