mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-16 01:25:42 +00:00
Shaopeng Wang
a531c5b762
* Implement 'transactional' annotation for runtime functions. * Allow function attributes for dispatchable calls in decl_module. * decl_module docs: add transactional function example. * decl_module docs: add function attributes notes. * Fix license header.
41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2020 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 proc_macro::TokenStream;
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use quote::quote;
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use syn::{parse_macro_input, ItemFn};
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pub fn transactional(_attr: TokenStream, input: TokenStream) -> TokenStream {
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let ItemFn { attrs, vis, sig, block } = parse_macro_input!(input as ItemFn);
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let output = quote! {
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#(#attrs)*
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#vis #sig {
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use frame_support::storage::{with_transaction, TransactionOutcome};
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with_transaction(|| {
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let r = #block;
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if r.is_ok() {
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TransactionOutcome::Commit(r)
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} else {
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TransactionOutcome::Rollback(r)
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}
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})
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}
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};
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output.into()
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}
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