mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-08 07:48:00 +00:00
Vivek Pandya
bc53b9a03a
* Change copyright year to 2023 from 2022 * Fix incorrect update of copyright year * Remove years from copy right header * Fix remaining files * Fix typo in a header and remove update-copyright.sh
124 lines
3.5 KiB
Rust
124 lines
3.5 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 syn::spanned::Spanned;
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/// Derive Debug but do not bound any generics.
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pub fn derive_debug_no_bound(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
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let input: syn::DeriveInput = match syn::parse(input) {
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Ok(input) => input,
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Err(e) => return e.to_compile_error().into(),
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};
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let input_ident = &input.ident;
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let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
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let impl_ = match input.data {
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syn::Data::Struct(struct_) => match struct_.fields {
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syn::Fields::Named(named) => {
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let fields =
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named.named.iter().map(|i| &i.ident).map(
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|i| quote::quote_spanned!(i.span() => .field(stringify!(#i), &self.#i) ),
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);
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quote::quote!(
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fmt.debug_struct(stringify!(#input_ident))
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#( #fields )*
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.finish()
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)
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},
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syn::Fields::Unnamed(unnamed) => {
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let fields = unnamed
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.unnamed
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.iter()
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.enumerate()
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.map(|(i, _)| syn::Index::from(i))
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.map(|i| quote::quote_spanned!(i.span() => .field(&self.#i) ));
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quote::quote!(
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fmt.debug_tuple(stringify!(#input_ident))
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#( #fields )*
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.finish()
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)
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},
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syn::Fields::Unit => quote::quote!(fmt.write_str(stringify!(#input_ident))),
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},
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syn::Data::Enum(enum_) => {
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let variants = enum_.variants.iter().map(|variant| {
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let ident = &variant.ident;
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let full_variant_str = format!("{}::{}", input_ident, ident);
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match &variant.fields {
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syn::Fields::Named(named) => {
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let captured = named.named.iter().map(|i| &i.ident);
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let debugged = captured.clone().map(|i| {
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quote::quote_spanned!(i.span() =>
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.field(stringify!(#i), &#i)
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)
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});
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quote::quote!(
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Self::#ident { #( ref #captured, )* } => {
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fmt.debug_struct(#full_variant_str)
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#( #debugged )*
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.finish()
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}
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)
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},
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syn::Fields::Unnamed(unnamed) => {
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let captured = unnamed
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.unnamed
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.iter()
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.enumerate()
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.map(|(i, f)| syn::Ident::new(&format!("_{}", i), f.span()));
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let debugged = captured
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.clone()
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.map(|i| quote::quote_spanned!(i.span() => .field(&#i)));
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quote::quote!(
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Self::#ident ( #( ref #captured, )* ) => {
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fmt.debug_tuple(#full_variant_str)
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#( #debugged )*
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.finish()
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}
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)
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},
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syn::Fields::Unit => quote::quote!(
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Self::#ident => fmt.write_str(#full_variant_str)
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),
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}
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});
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quote::quote!(match *self {
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#( #variants, )*
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})
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},
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syn::Data::Union(_) => {
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let msg = "Union type not supported by `derive(DebugNoBound)`";
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return syn::Error::new(input.span(), msg).to_compile_error().into()
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},
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};
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quote::quote!(
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const _: () = {
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impl #impl_generics core::fmt::Debug for #input_ident #ty_generics #where_clause {
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fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
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#impl_
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}
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}
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};
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)
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.into()
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}
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