Update Pallet placeholder struct as per FRAME v2 (#14348)

* Update Pallet placeholder struct as per FRAME v3

* ".git/.scripts/commands/fmt/fmt.sh"

* Update lib.rs

Removed the unused import

---------

Co-authored-by: command-bot <>

substrate/frame/asset-conversion/src/lib.rs

@@ -111,7 +111,7 @@ pub mod pallet {
 	use sp_std::prelude::*;
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/atomic-swap/src/lib.rs

@@ -184,7 +184,7 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::storage]
 	pub type PendingSwaps<T: Config> = StorageDoubleMap<

substrate/frame/beefy/src/lib.rs

@@ -112,7 +112,7 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	/// The current authorities set
 	#[pallet::storage]

substrate/frame/benchmarking/pov/src/lib.rs

@@ -32,7 +32,7 @@ pub mod pallet {
 	use sp_std::prelude::*;
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/benchmarking/src/tests.rs

@@ -35,7 +35,7 @@ mod pallet_test {
 	use frame_system::pallet_prelude::*;
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/contracts/src/lib.rs

@@ -129,7 +129,7 @@ use pallet_contracts_primitives::{
 use scale_info::TypeInfo;
 use smallvec::Array;
 use sp_runtime::traits::{Convert, Hash, Saturating, StaticLookup, Zero};
-use sp_std::{fmt::Debug, marker::PhantomData, prelude::*};
+use sp_std::{fmt::Debug, prelude::*};
 
 pub use crate::{
 	address::{AddressGenerator, DefaultAddressGenerator},
@@ -191,7 +191,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::storage_version(STORAGE_VERSION)]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/election-provider-multi-phase/src/lib.rs

@@ -1343,7 +1343,7 @@ pub mod pallet {
 	#[pallet::pallet]
 	#[pallet::without_storage_info]
 	#[pallet::storage_version(STORAGE_VERSION)]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 }
 
 impl<T: Config> Pallet<T> {

substrate/frame/elections-phragmen/src/lib.rs

@@ -192,7 +192,7 @@ pub mod pallet {
 	#[pallet::pallet]
 	#[pallet::storage_version(STORAGE_VERSION)]
 	#[pallet::without_storage_info]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/indices/src/lib.rs

@@ -75,7 +75,7 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::call]
 	impl<T: Config> Pallet<T> {

substrate/frame/nft-fractionalization/src/lib.rs

@@ -86,7 +86,7 @@ pub mod pallet {
 	use sp_std::{fmt::Display, prelude::*};
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {

substrate/frame/preimage/src/lib.rs

@@ -108,7 +108,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::storage_version(STORAGE_VERSION)]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::event]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]

substrate/frame/scheduler/src/mock.rs

@@ -50,7 +50,7 @@ pub mod logger {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::hooks]
 	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}

substrate/frame/sudo/src/lib.rs

@@ -59,7 +59,7 @@
 //! 	use frame_system::pallet_prelude::*;
 //!
 //! 	#[pallet::pallet]
-//! 	pub struct Pallet<T>(PhantomData<T>);
+//! 	pub struct Pallet<T>(_);
 //!
 //! 	#[pallet::config]
 //! 	pub trait Config: frame_system::Config {}
@@ -141,7 +141,7 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::call]
 	impl<T: Config> Pallet<T> {

substrate/frame/sudo/src/mock.rs

@@ -39,7 +39,7 @@ pub mod logger {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::call]
 	impl<T: Config> Pallet<T> {

substrate/frame/support/src/dispatch.rs

@@ -3582,7 +3582,7 @@ mod weight_tests {
 		use crate::pallet_prelude::*;
 
 		#[pallet::pallet]
-		pub struct Pallet<T>(PhantomData<T>);
+		pub struct Pallet<T>(_);
 
 		#[pallet::config]
 		#[pallet::disable_frame_system_supertrait_check]

substrate/frame/support/src/lib.rs

@@ -848,7 +848,7 @@ pub mod tests {
 		use crate::pallet_prelude::*;
 
 		#[pallet::pallet]
-		pub struct Pallet<T>(PhantomData<T>);
+		pub struct Pallet<T>(_);
 
 		#[pallet::config]
 		#[pallet::disable_frame_system_supertrait_check]

substrate/frame/support/src/storage/generator/mod.rs

@@ -53,7 +53,7 @@ mod tests {
 		use crate::pallet_prelude::*;
 
 		#[pallet::pallet]
-		pub struct Pallet<T>(PhantomData<T>);
+		pub struct Pallet<T>(_);
 
 		#[pallet::config]
 		#[pallet::disable_frame_system_supertrait_check]

substrate/frame/support/test/tests/final_keys.rs

@@ -34,7 +34,7 @@ mod no_instance {
 	use frame_support_test as frame_system;
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {}

substrate/frame/support/test/tests/genesisconfig.rs

@@ -28,7 +28,7 @@ pub mod pallet {
 	use frame_support_test as frame_system;
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {}

substrate/frame/support/test/tests/issue2219.rs

@@ -80,7 +80,7 @@ mod module {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config + TypeInfo {}

substrate/frame/timestamp/src/lib.rs

@@ -151,7 +151,7 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	/// Current time for the current block.
 	#[pallet::storage]

substrate/test-utils/runtime/src/substrate_test_pallet.rs

@@ -45,7 +45,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	#[pallet::without_storage_info]
-	pub struct Pallet<T>(PhantomData<T>);
+	pub struct Pallet<T>(_);
 
 	#[pallet::config]
 	pub trait Config: frame_system::Config {}

substrate/utils/frame/rpc/support/src/lib.rs

@@ -94,7 +94,7 @@ use sp_storage::{StorageData, StorageKey};
 /// 	use frame_support::pallet_prelude::*;
 ///
 /// 	#[pallet::pallet]
-/// 	pub struct Pallet<T>(PhantomData<T>);
+/// 	pub struct Pallet<T>(_);
 ///
 /// 	#[pallet::config]
 /// 	pub trait Config: frame_system::Config {}