add tests, implement StoragePrefixedMap on types

frame/support/procedural/src/pallet/expand/module.rs

@@ -49,7 +49,7 @@ pub fn expand_module(def: &mut Def) -> proc_macro2::TokenStream {
 
 		quote::quote_spanned!(fn_deposit_event_span =>
 			impl<#type_impl_gen> Module<#type_use_gen> {
-				fn deposit_event(event: Event<#event_use_gen>) {
+				pub fn deposit_event(event: Event<#event_use_gen>) {
 					let event = <
 						<T as Trait#trait_use_gen>::Event as
 						From<Event<#event_use_gen>>

frame/support/src/lib.rs

@@ -831,6 +831,9 @@ pub mod pallet_prelude {
 	pub use sp_std::marker::PhantomData;
 	pub use frame_support::traits::{Get, Instance, ModuleInterface, GenesisBuilder, IsType};
 	pub use frame_support::dispatch::{DispatchResultWithPostInfo, Parameter};
+	pub use frame_support::storage::types::*;
+	pub use frame_support::{EqNoBound, PartialEqNoBound, DebugStripped, DebugNoBound, CloneNoBound};
+	pub use codec::{Encode, Decode};
 	pub use sp_inherents::ProvideInherent;
 	pub use sp_inherents::InherentData;
 	pub use sp_inherents::InherentIdentifier;
@@ -846,7 +849,6 @@ pub mod pallet_prelude {
 			UnknownTransaction,
 		},
 	};
-	pub use frame_support::storage::types::*;
 	pub use crate::{
 		StorageValue, StorageMap, StorageDoubleMap, StoragePrefixedMap, IterableStorageMap,
 		IterableStorageDoubleMap,
@@ -1146,6 +1148,7 @@ pub mod pallet_prelude {
 /// 	// Define the module struct placeholder, various pallet function are implemented on it.
 /// 	// The macro checks struct generics: is expected `T` or `T, I = DefaultInstance`
 /// 	#[pallet::module]
+/// 	#[pallet::generate(fn deposit_event)]
 /// 	pub struct Module<T>(PhantomData<T>);
 ///
 /// 	// Implement on the module interface on module.

frame/support/src/storage/types.rs

@@ -160,6 +160,24 @@ where
 	}
 }
 
+impl<Prefix, Hasher, Key, Value, QueryKind, OnEmpty> super::StoragePrefixedMap<Value> for
+	StorageMapType<Prefix, Hasher, Key, Value, QueryKind, OnEmpty>
+where
+	Prefix: StorageInstance,
+	Hasher: crate::hash::StorageHasher,
+	Key: FullEncode,
+	Value: FullCodec,
+	QueryKind: QueryKindTrait<Value>,
+	OnEmpty: crate::traits::Get<QueryKind::Query> + 'static,
+{
+	fn module_prefix() -> &'static [u8] {
+		<Self as super::generator::StorageMap<Key, Value>>::module_prefix()
+	}
+	fn storage_prefix() -> &'static [u8] {
+		<Self as super::generator::StorageMap<Key, Value>>::storage_prefix()
+	}
+}
+
 /// A type that implements StorageDoubleMap when generics are correctly set:
 /// * Prefix must implement StorageInstance, when used inside pallet macro with
 ///   `#[pallet::storage]` just write `_` the macro will expand with an automatically generated
@@ -210,6 +228,27 @@ where
 	}
 }
 
+impl<Prefix, Hasher1, Key1, Hasher2, Key2, Value, QueryKind, OnEmpty>
+	super::StoragePrefixedMap<Value> for
+	StorageDoubleMapType<Prefix, Hasher1, Key1, Hasher2, Key2, Value, QueryKind, OnEmpty>
+where
+	Prefix: StorageInstance,
+	Hasher1: crate::hash::StorageHasher,
+	Hasher2: crate::hash::StorageHasher,
+	Key1: FullEncode,
+	Key2: FullEncode,
+	Value: FullCodec,
+	QueryKind: QueryKindTrait<Value>,
+	OnEmpty: crate::traits::Get<QueryKind::Query> + 'static
+{
+	fn module_prefix() -> &'static [u8] {
+		<Self as super::generator::StorageDoubleMap<Key1, Key2, Value>>::module_prefix()
+	}
+	fn storage_prefix() -> &'static [u8] {
+		<Self as super::generator::StorageDoubleMap<Key1, Key2, Value>>::storage_prefix()
+	}
+}
+
 /// Part of storage metadata for storage value.
 pub trait StorageValueMetadata {
 	const MODIFIER: StorageEntryModifier;