Allow pallet's info to be enumerated (#10053)

* Allow pallet's info to be enumerated

* Fixes

* Formatting

* Flat tuple for getting all pallet instances

* Renaming and fixing reversedness

* Formatting

* Fixes

* Back to nesting

* Back to nestingx

* Revert executive lib

* Reversions

* Reversions

* Fixes

* Fixes

* Formatting

* Fixes

* Spelling

* Comments

substrate/frame/support/procedural/src/construct_runtime/mod.rs

@@ -217,6 +217,7 @@ fn decl_all_pallets<'a>(
 
 	quote!(
 		#types
+
 		/// All pallets included in the runtime as a nested tuple of types.
 		/// Excludes the System pallet.
 		pub type AllPallets = ( #all_pallets );

substrate/frame/support/procedural/src/pallet/expand/pallet_struct.rs

@@ -233,6 +233,25 @@ pub fn expand_pallet_struct(def: &mut Def) -> proc_macro2::TokenStream {
 			}
 		}
 
+		impl<#type_impl_gen> #frame_support::traits::PalletsInfoAccess
+			for #pallet_ident<#type_use_gen>
+			#config_where_clause
+		{
+			fn count() -> usize { 1 }
+			fn accumulate(
+				acc: &mut #frame_support::sp_std::vec::Vec<#frame_support::traits::PalletInfoData>
+			) {
+				use #frame_support::traits::PalletInfoAccess;
+				let item = #frame_support::traits::PalletInfoData {
+					index: Self::index(),
+					name: Self::name(),
+					module_name: Self::module_name(),
+					crate_version: Self::crate_version(),
+				};
+				acc.push(item);
+			}
+		}
+
 		#storage_info
 	)
 }