feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

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

@@ -0,0 +1,43 @@
+// This file is part of Substrate.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::{pallet::Def, NUMBER_OF_INSTANCE};
+use proc_macro2::Span;
+
+///
+/// * Provide inherent instance to be used by construct_runtime
+/// * Provide Instance1 ..= Instance16 for instantiable pallet
+pub fn expand_instances(def: &mut Def) -> proc_macro2::TokenStream {
+	let frame_support = &def.frame_support;
+	let inherent_ident = syn::Ident::new(crate::INHERENT_INSTANCE_NAME, Span::call_site());
+	let instances = if def.config.has_instance {
+		(1..=NUMBER_OF_INSTANCE)
+			.map(|i| syn::Ident::new(&format!("Instance{}", i), Span::call_site()))
+			.collect()
+	} else {
+		vec![]
+	};
+
+	quote::quote!(
+		/// Hidden instance generated to be internally used when module is used without
+		/// instance.
+		#[doc(hidden)]
+		pub type #inherent_ident = ();
+
+		#( pub use #frame_support::instances::#instances; )*
+	)
+}