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