mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 09:17:58 +00:00
Benjamin Kampmann
65 lines
2.5 KiB
Rust
65 lines
2.5 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2020 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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//! This crate provides procedural macros for usage within the context of the Substrate runtime
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//! interface.
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//!
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//! The following macros are provided:
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//!
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//! 1. The [`#[runtime_interface]`](attr.runtime_interface.html) attribute macro for generating the
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//! runtime interfaces.
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//! 2. The [`PassByCodec`](derive.PassByCodec.html) derive macro for implementing `PassBy` with `Codec`.
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//! 3. The [`PassByEnum`](derive.PassByInner.html) derive macro for implementing `PassBy` with `Enum`.
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//! 4. The [`PassByInner`](derive.PassByInner.html) derive macro for implementing `PassBy` with `Inner`.
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use syn::{parse_macro_input, ItemTrait, DeriveInput};
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mod pass_by;
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mod runtime_interface;
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mod utils;
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#[proc_macro_attribute]
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pub fn runtime_interface(
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attrs: proc_macro::TokenStream,
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input: proc_macro::TokenStream,
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) -> proc_macro::TokenStream {
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let trait_def = parse_macro_input!(input as ItemTrait);
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let wasm_only = parse_macro_input!(attrs as Option<runtime_interface::keywords::wasm_only>);
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runtime_interface::runtime_interface_impl(trait_def, wasm_only.is_some())
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.unwrap_or_else(|e| e.to_compile_error())
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.into()
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}
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#[proc_macro_derive(PassByCodec)]
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pub fn pass_by_codec(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
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let input = parse_macro_input!(input as DeriveInput);
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pass_by::codec_derive_impl(input).unwrap_or_else(|e| e.to_compile_error()).into()
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}
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#[proc_macro_derive(PassByInner)]
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pub fn pass_by_inner(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
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let input = parse_macro_input!(input as DeriveInput);
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pass_by::inner_derive_impl(input).unwrap_or_else(|e| e.to_compile_error()).into()
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}
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#[proc_macro_derive(PassByEnum)]
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pub fn pass_by_enum(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
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let input = parse_macro_input!(input as DeriveInput);
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pass_by::enum_derive_impl(input).unwrap_or_else(|e| e.to_compile_error()).into()
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}
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