Replace derivative dependency with derive-where (#7324)

# Description

Close #7122.

This PR replaces the unmaintained `derivative` dependency with
`derive-where`.

## Integration

This PR doesn't change the public interfaces.

## Review Notes

The `derivative` crate, previously used to derive basic traits for
structs with generics or enums, is no longer actively maintained. It has
been replaced with the `derive-where` crate, which offers a more
straightforward syntax while providing the same features as
`derivative`.

---------

Co-authored-by: Guillaume Thiolliere <[email protected]>

Author: conr2d

Cargo.lock

@@ -740,8 +740,8 @@ cumulus-test-relay-sproof-builder = { path = "cumulus/test/relay-sproof-builder"
 cumulus-test-runtime = { path = "cumulus/test/runtime" }
 cumulus-test-service = { path = "cumulus/test/service" }
 curve25519-dalek = { version = "4.1.3" }
-derivative = { version = "2.2.0", default-features = false }
 derive-syn-parse = { version = "0.2.0" }
+derive-where = { version = "1.2.7" }
 derive_more = { version = "0.99.17", default-features = false }
 digest = { version = "0.10.3", default-features = false }
 directories = { version = "5.0.1" }

Cargo.toml

@@ -27,7 +27,7 @@ frame-system = { workspace = true }
 
 # Other dependencies
 codec = { features = ["derive"], workspace = true }
-derivative = { features = ["use_core"], workspace = true }
+derive-where = { workspace = true }
 docify = { workspace = true }
 log = { workspace = true, default-features = true }
 scale-info = { features = ["derive"], workspace = true }

cumulus/pallets/weight-reclaim/Cargo.toml

@@ -29,7 +29,7 @@ extern crate alloc;
 use alloc::vec::Vec;
 use codec::{Decode, Encode};
 use cumulus_primitives_storage_weight_reclaim::get_proof_size;
-use derivative::Derivative;
+use derive_where::derive_where;
 use frame_support::{
 	dispatch::{DispatchInfo, PostDispatchInfo},
 	pallet_prelude::Weight,
@@ -83,13 +83,8 @@ pub mod pallet {
 /// calculates the unused weight using the post information and reclaim the unused weight.
 /// So this extension can be used as a drop-in replacement for `WeightReclaim` extension for
 /// parachains.
-#[derive(Encode, Decode, TypeInfo, Derivative)]
-#[derivative(
-	Clone(bound = "S: Clone"),
-	Eq(bound = "S: Eq"),
-	PartialEq(bound = "S: PartialEq"),
-	Default(bound = "S: Default")
-)]
+#[derive(Encode, Decode, TypeInfo)]
+#[derive_where(Clone, Eq, PartialEq, Default; S)]
 #[scale_info(skip_type_params(T))]
 pub struct StorageWeightReclaim<T, S>(pub S, core::marker::PhantomData<T>);
 

cumulus/pallets/weight-reclaim/src/lib.rs

@@ -15,7 +15,7 @@ workspace = true
 array-bytes = { workspace = true, default-features = true }
 bounded-collections = { features = ["serde"], workspace = true }
 codec = { features = ["derive", "max-encoded-len"], workspace = true }
-derivative = { features = ["use_core"], workspace = true }
+derive-where = { workspace = true }
 environmental = { workspace = true }
 frame-support = { workspace = true }
 hex-literal = { workspace = true, default-features = true }

polkadot/xcm/Cargo.toml

@@ -25,7 +25,7 @@
 extern crate alloc;
 
 use codec::{Decode, DecodeLimit, Encode, Error as CodecError, Input, MaxEncodedLen};
-use derivative::Derivative;
+use derive_where::derive_where;
 use frame_support::dispatch::GetDispatchInfo;
 use scale_info::TypeInfo;
 
@@ -88,13 +88,7 @@ macro_rules! versioned_type {
 		$(#[$index5:meta])+
 		V5($v5:ty),
 	}) => {
-		#[derive(Derivative, Encode, Decode, TypeInfo)]
-		#[derivative(
-			Clone(bound = ""),
-			Eq(bound = ""),
-			PartialEq(bound = ""),
-			Debug(bound = "")
-		)]
+		#[derive(Clone, Eq, PartialEq, Debug, Encode, Decode, TypeInfo)]
 		#[codec(encode_bound())]
 		#[codec(decode_bound())]
 		#[scale_info(replace_segment("staging_xcm", "xcm"))]
@@ -311,8 +305,8 @@ versioned_type! {
 }
 
 /// A single XCM message, together with its version code.
-#[derive(Derivative, Encode, Decode, TypeInfo)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Encode, Decode, TypeInfo)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(RuntimeCall))]

polkadot/xcm/src/lib.rs

@@ -28,7 +28,7 @@ use codec::{
 	MaxEncodedLen,
 };
 use core::{fmt::Debug, result};
-use derivative::Derivative;
+use derive_where::derive_where;
 use scale_info::TypeInfo;
 
 mod junction;
@@ -57,8 +57,8 @@ pub const VERSION: super::Version = 3;
 /// An identifier for a query.
 pub type QueryId = u64;
 
-#[derive(Derivative, Default, Encode, TypeInfo)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Default, Encode, TypeInfo)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]
 #[scale_info(replace_segment("staging_xcm", "xcm"))]
@@ -474,15 +474,8 @@ impl XcmContext {
 ///
 /// This is the inner XCM format and is version-sensitive. Messages are typically passed using the
 /// outer XCM format, known as `VersionedXcm`.
-#[derive(
-	Derivative,
-	Encode,
-	Decode,
-	TypeInfo,
-	xcm_procedural::XcmWeightInfoTrait,
-	xcm_procedural::Builder,
-)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Encode, Decode, TypeInfo, xcm_procedural::XcmWeightInfoTrait, xcm_procedural::Builder)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]

polkadot/xcm/src/v3/mod.rs

@@ -35,7 +35,7 @@ use codec::{
 	MaxEncodedLen,
 };
 use core::{fmt::Debug, result};
-use derivative::Derivative;
+use derive_where::derive_where;
 use frame_support::dispatch::GetDispatchInfo;
 use scale_info::TypeInfo;
 
@@ -65,8 +65,8 @@ pub const VERSION: super::Version = 4;
 /// An identifier for a query.
 pub type QueryId = u64;
 
-#[derive(Derivative, Default, Encode, TypeInfo)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Default, Encode, TypeInfo)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]
@@ -436,15 +436,8 @@ impl XcmContext {
 ///
 /// This is the inner XCM format and is version-sensitive. Messages are typically passed using the
 /// outer XCM format, known as `VersionedXcm`.
-#[derive(
-	Derivative,
-	Encode,
-	Decode,
-	TypeInfo,
-	xcm_procedural::XcmWeightInfoTrait,
-	xcm_procedural::Builder,
-)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Encode, Decode, TypeInfo, xcm_procedural::XcmWeightInfoTrait, xcm_procedural::Builder)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]

polkadot/xcm/src/v4/mod.rs

@@ -29,7 +29,7 @@ use codec::{
 	MaxEncodedLen,
 };
 use core::{fmt::Debug, result};
-use derivative::Derivative;
+use derive_where::derive_where;
 use scale_info::TypeInfo;
 
 mod asset;
@@ -59,8 +59,8 @@ pub const VERSION: super::Version = 5;
 /// An identifier for a query.
 pub type QueryId = u64;
 
-#[derive(Derivative, Default, Encode, TypeInfo)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Default, Encode, TypeInfo)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]
@@ -378,15 +378,8 @@ impl XcmContext {
 ///
 /// This is the inner XCM format and is version-sensitive. Messages are typically passed using the
 /// outer XCM format, known as `VersionedXcm`.
-#[derive(
-	Derivative,
-	Encode,
-	Decode,
-	TypeInfo,
-	xcm_procedural::XcmWeightInfoTrait,
-	xcm_procedural::Builder,
-)]
-#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
+#[derive(Encode, Decode, TypeInfo, xcm_procedural::XcmWeightInfoTrait, xcm_procedural::Builder)]
+#[derive_where(Clone, Eq, PartialEq, Debug)]
 #[codec(encode_bound())]
 #[codec(decode_bound())]
 #[scale_info(bounds(), skip_type_params(Call))]

polkadot/xcm/src/v5/mod.rs

@@ -0,0 +1,17 @@
+title: Replace derivative dependency with derive-where
+author: conr2d
+topic: runtime
+
+doc:
+- audience: Runtime Dev
+  description: |-
+    The `derivative` crate, previously used to derive basic traits for structs with
+    generics or enums, is no longer actively maintained. It has been replaced with
+    the `derive-where` crate, which offers a more straightforward syntax while
+    providing the same features as `derivative`.
+
+crates:
+  - name: cumulus-pallet-weight-reclaim
+    bump: patch
+  - name: staging-xcm
+    bump: patch