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Make pallet macro generate accessor to PalletInfo information on pallet placeholder (#8630)

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* generate accessor to PalletInfo information on pallet placeholder

* remove unused

* use trait, and add tests

* less verbose doc

* add PalletInfoAccess to prelude for ease usage
This commit is contained in:
Guillaume Thiolliere
2021-04-19 12:09:23 +02:00
committed by GitHub
parent d64f79924a
commit ea10494ca9
8 changed files with 67 additions and 4 deletions
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substrate/frame/support/procedural/src/pallet/expand/pallet_struct.rs
+23
View File
@@ -23,6 +23,7 @@ use crate::pallet::{Def, parse::helper::get_doc_literals};
/// * Implement ModuleErrorMetadata on Pallet
/// * declare Module type alias for construct_runtime
/// * replace the first field type of `struct Pallet` with `PhantomData` if it is `_`
/// * implementation of `PalletInfoAccess` information
pub fn expand_pallet_struct(def: &mut Def) -> proc_macro2::TokenStream {
let frame_support = &def.frame_support;
let frame_system = &def.frame_system;
@@ -134,5 +135,27 @@ pub fn expand_pallet_struct(def: &mut Def) -> proc_macro2::TokenStream {
.put_into_storage::<<T as #frame_system::Config>::PalletInfo, Self>();
}
}
// Implement `PalletInfoAccess` for `Pallet`
impl<#type_impl_gen> #frame_support::traits::PalletInfoAccess
for #pallet_ident<#type_use_gen>
#config_where_clause
{
fn index() -> usize {
<
<T as #frame_system::Config>::PalletInfo as #frame_support::traits::PalletInfo
>::index::<Self>()
.expect("Pallet is part of the runtime because pallet `Config` trait is \
implemented by the runtime")
}
fn name() -> &'static str {
<
<T as #frame_system::Config>::PalletInfo as #frame_support::traits::PalletInfo
>::name::<Self>()
.expect("Pallet is part of the runtime because pallet `Config` trait is \
implemented by the runtime")
}
}
)
}