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hold_reason.rs
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hold_reason.rs
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// This file is part of Substrate.
// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License
use crate::construct_runtime::{parse::PalletPath, Pallet};
use proc_macro2::{Ident, TokenStream};
use quote::quote;
pub fn expand_outer_hold_reason(pallet_decls: &[Pallet], scrate: &TokenStream) -> TokenStream {
let mut conversion_fns = Vec::new();
let mut hold_reason_variants = Vec::new();
for decl in pallet_decls {
if let Some(_) = decl.find_part("HoldReason") {
let variant_name = &decl.name;
let path = &decl.path;
let index = decl.index;
conversion_fns.push(expand_conversion_fn(path, variant_name));
hold_reason_variants.push(expand_variant(index, path, variant_name));
}
}
quote! {
/// A reason for placing a hold on funds.
#[derive(
Copy, Clone, Eq, PartialEq, Ord, PartialOrd,
#scrate::codec::Encode, #scrate::codec::Decode, #scrate::codec::MaxEncodedLen,
#scrate::scale_info::TypeInfo,
#scrate::RuntimeDebug,
)]
pub enum RuntimeHoldReason {
#( #hold_reason_variants )*
}
#( #conversion_fns )*
}
}
fn expand_conversion_fn(path: &PalletPath, variant_name: &Ident) -> TokenStream {
quote! {
impl From<#path::HoldReason> for RuntimeHoldReason {
fn from(hr: #path::HoldReason) -> Self {
RuntimeHoldReason::#variant_name(hr)
}
}
}
}
fn expand_variant(index: u8, path: &PalletPath, variant_name: &Ident) -> TokenStream {
quote! {
#[codec(index = #index)]
#variant_name(#path::HoldReason),
}
}