mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-29 11:27:24 +00:00
Gav Wood
1e01162505
* Remove unneeded script * Rename Substrate Demo -> Substrate * Rename demo -> node * Build wasm from last rename. * Merge ed25519 into substrate-primitives * Minor tweak * Rename substrate -> core * Move substrate-runtime-support to core/runtime/support * Rename/move substrate-runtime-version * Move codec up a level * Rename substrate-codec -> parity-codec * Move environmental up a level * Move pwasm-* up to top, ready for removal * Remove requirement of s-r-support from s-r-primitives * Move core/runtime/primitives into core/runtime-primitives * Remove s-r-support dep from s-r-version * Remove dep of s-r-support from bft * Remove dep of s-r-support from node/consensus * Sever all other core deps from s-r-support * Forgot the no_std directive * Rename non-SRML modules to sr-* to avoid match clashes * Move runtime/* to srml/* * Rename substrate-runtime-* -> srml-* * Move srml to top-level
112 lines
2.6 KiB
Rust
112 lines
2.6 KiB
Rust
// Copyright 2018 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Substrate is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
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use proc_macro2::{Span, TokenStream, Ident};
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use syn::{
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Data, Fields,
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spanned::Spanned,
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};
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pub fn quote(data: &Data, type_name: &Ident, input: &TokenStream) -> TokenStream {
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let call_site = Span::call_site();
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match *data {
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Data::Struct(ref data) => match data.fields {
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Fields::Named(_) | Fields::Unnamed(_) => create_instance(
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call_site,
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quote! { #type_name },
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input,
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&data.fields,
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),
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Fields::Unit => {
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quote_spanned! {call_site =>
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drop(#input);
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Some(#type_name)
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}
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},
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},
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Data::Enum(ref data) => {
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assert!(data.variants.len() < 256, "Currently only enums with at most 256 variants are encodable.");
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let recurse = data.variants.iter().enumerate().map(|(i, v)| {
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let name = &v.ident;
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let index = super::index(v, i);
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let create = create_instance(
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call_site,
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quote! { #type_name :: #name },
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input,
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&v.fields,
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);
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quote_spanned! { v.span() =>
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x if x == #index as u8 => {
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#create
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},
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}
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});
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quote! {
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match #input.read_byte()? {
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#( #recurse )*
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_ => None,
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}
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}
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},
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Data::Union(_) => panic!("Union types are not supported."),
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}
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}
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fn create_instance(call_site: Span, name: TokenStream, input: &TokenStream, fields: &Fields) -> TokenStream {
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match *fields {
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Fields::Named(ref fields) => {
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let recurse = fields.named.iter().map(|f| {
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let name = &f.ident;
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let field = quote_spanned!(call_site => #name);
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quote_spanned! { f.span() =>
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#field: ::codec::Decode::decode(#input)?
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}
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});
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quote_spanned! {call_site =>
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Some(#name {
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#( #recurse, )*
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})
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}
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},
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Fields::Unnamed(ref fields) => {
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let recurse = fields.unnamed.iter().map(|f| {
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quote_spanned! { f.span() =>
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::codec::Decode::decode(#input)?
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}
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});
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quote_spanned! {call_site =>
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Some(#name (
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#( #recurse, )*
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))
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}
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},
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Fields::Unit => {
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quote_spanned! {call_site =>
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Some(#name)
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}
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},
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}
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}
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