Phase 1 of repo reorg (#719)

* 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
2026-07-02 08:17:24 +00:00 · 2018-09-12 11:13:31 +02:00
parent 8fe5aa4c81
commit 1e01162505
374 changed files with 2845 additions and 2902 deletions
@@ -0,0 +1,111 @@
+// Copyright 2018 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use proc_macro2::{Span, TokenStream, Ident};
+use syn::{
+	Data, Fields,
+	spanned::Spanned,
+};
+
+pub fn quote(data: &Data, type_name: &Ident, input: &TokenStream) -> TokenStream {
+	let call_site = Span::call_site();
+	match *data {
+		Data::Struct(ref data) => match data.fields {
+			Fields::Named(_) | Fields::Unnamed(_) => create_instance(
+				call_site,
+				quote! { #type_name },
+				input,
+				&data.fields,
+			),
+			Fields::Unit => {
+				quote_spanned! {call_site =>
+					drop(#input);
+					Some(#type_name)
+				}
+			},
+		},
+		Data::Enum(ref data) => {
+			assert!(data.variants.len() < 256, "Currently only enums with at most 256 variants are encodable.");
+
+			let recurse = data.variants.iter().enumerate().map(|(i, v)| {
+				let name = &v.ident;
+				let index = super::index(v, i);
+
+				let create = create_instance(
+					call_site,
+					quote! { #type_name :: #name },
+					input,
+					&v.fields,
+				);
+
+				quote_spanned! { v.span() =>
+					x if x == #index as u8 => {
+						#create
+					},
+				}
+			});
+
+			quote! {
+				match #input.read_byte()? {
+					#( #recurse )*
+					_ => None,
+				}
+
+			}
+
+		},
+		Data::Union(_) => panic!("Union types are not supported."),
+	}
+}
+
+fn create_instance(call_site: Span, name: TokenStream, input: &TokenStream, fields: &Fields) -> TokenStream {
+	match *fields {
+		Fields::Named(ref fields) => {
+			let recurse = fields.named.iter().map(|f| {
+				let name = &f.ident;
+				let field = quote_spanned!(call_site => #name);
+
+				quote_spanned! { f.span() =>
+					#field: ::codec::Decode::decode(#input)?
+				}
+			});
+
+			quote_spanned! {call_site =>
+				Some(#name {
+					#( #recurse, )*
+				})
+			}
+		},
+		Fields::Unnamed(ref fields) => {
+			let recurse = fields.unnamed.iter().map(|f| {
+				quote_spanned! { f.span() =>
+					::codec::Decode::decode(#input)?
+				}
+			});
+
+			quote_spanned! {call_site =>
+				Some(#name (
+					#( #recurse, )*
+				))
+			}
+		},
+		Fields::Unit => {
+			quote_spanned! {call_site =>
+				Some(#name)
+			}
+		},
+	}
+}