mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 16:57:58 +00:00
Benjamin Kampmann
93 lines
2.6 KiB
Rust
93 lines
2.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2017-2020 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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// tag::description[]
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//! Proc macro helpers for procedural macros
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// end::description[]
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// reexport proc macros
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pub use frame_support_procedural_tools_derive::*;
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use proc_macro_crate::crate_name;
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use syn::parse::Error;
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use quote::quote;
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pub mod syn_ext;
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// FIXME #1569, remove the following functions, which are copied from sp-api-macros
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use proc_macro2::{TokenStream, Span};
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use syn::Ident;
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fn generate_hidden_includes_mod_name(unique_id: &str) -> Ident {
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Ident::new(&format!("sp_api_hidden_includes_{}", unique_id), Span::call_site())
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}
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/// Generates the access to the `frame-support` crate.
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pub fn generate_crate_access(unique_id: &str, def_crate: &str) -> TokenStream {
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if std::env::var("CARGO_PKG_NAME").unwrap() == def_crate {
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quote::quote!( frame_support )
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} else {
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let mod_name = generate_hidden_includes_mod_name(unique_id);
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quote::quote!( self::#mod_name::hidden_include )
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}
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}
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/// Generates the hidden includes that are required to make the macro independent from its scope.
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pub fn generate_hidden_includes(unique_id: &str, def_crate: &str) -> TokenStream {
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if std::env::var("CARGO_PKG_NAME").unwrap() == def_crate {
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TokenStream::new()
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} else {
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let mod_name = generate_hidden_includes_mod_name(unique_id);
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match crate_name(def_crate) {
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Ok(name) => {
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let name = Ident::new(&name, Span::call_site());
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quote::quote!(
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#[doc(hidden)]
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mod #mod_name {
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pub extern crate #name as hidden_include;
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}
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)
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},
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Err(e) => {
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let err = Error::new(Span::call_site(), &e).to_compile_error();
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quote!( #err )
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}
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}
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}
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}
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// fn to remove white spaces around string types
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// (basically whitespaces around tokens)
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pub fn clean_type_string(input: &str) -> String {
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input
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.replace(" ::", "::")
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.replace(":: ", "::")
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.replace(" ,", ",")
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.replace(" ;", ";")
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.replace(" [", "[")
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.replace("[ ", "[")
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.replace(" ]", "]")
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.replace(" (", "(")
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.replace("( ", "(")
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.replace(" )", ")")
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.replace(" <", "<")
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.replace("< ", "<")
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.replace(" >", ">")
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}
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