mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-28 07:27:55 +00:00
Bastian Köcher
e3e651f72c
* Happy new year Updates the copyright years and fixes wrong license headers. * Fix the template * Split HEADER into HEADER-APACHE & HEADER-GPL
102 lines
3.4 KiB
Rust
102 lines
3.4 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2021 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, Result, Token};
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use syn::parse::{Parse, ParseStream};
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mod pass_by;
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mod runtime_interface;
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mod utils;
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struct Options {
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wasm_only: bool,
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tracing: bool
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}
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impl Options {
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fn unpack(self) -> (bool, bool) {
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(self.wasm_only, self.tracing)
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}
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}
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impl Default for Options {
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fn default() -> Self {
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Options { wasm_only: false, tracing: true }
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}
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}
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impl Parse for Options {
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fn parse(input: ParseStream) -> Result<Self> {
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let mut res = Self::default();
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while !input.is_empty() {
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let lookahead = input.lookahead1();
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if lookahead.peek(runtime_interface::keywords::wasm_only) {
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let _ = input.parse::<runtime_interface::keywords::wasm_only>();
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res.wasm_only = true;
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} else if lookahead.peek(runtime_interface::keywords::no_tracing) {
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let _ = input.parse::<runtime_interface::keywords::no_tracing>();
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res.tracing = false;
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} else if lookahead.peek(Token![,]) {
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let _ = input.parse::<Token![,]>();
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} else {
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return Err(lookahead.error())
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}
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}
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Ok(res)
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}
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}
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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, tracing) = parse_macro_input!(attrs as Options).unpack();
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runtime_interface::runtime_interface_impl(trait_def, wasm_only, tracing)
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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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} |