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allow where clause in decl_error (#7324)

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This commit is contained in:
Guillaume Thiolliere
2020-10-14 17:39:27 +02:00
committed by GitHub
parent 8503cc0892
commit 1164ced041
2 changed files with 18 additions and 2 deletions
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substrate/frame/support/src/error.rs
+11 -2
View File
@@ -77,6 +77,7 @@ macro_rules! decl_error {
$generic:ident: $trait:path $generic:ident: $trait:path
$(, $inst_generic:ident: $instance:path)? $(, $inst_generic:ident: $instance:path)?
> >
$( where $( $where_ty:ty: $where_bound:path )* $(,)? )?
{ {
$( $(
$( #[doc = $doc_attr:tt] )* $( #[doc = $doc_attr:tt] )*
@@ -86,7 +87,9 @@ macro_rules! decl_error {
} }
) => { ) => {
$(#[$attr])* $(#[$attr])*
pub enum $error<$generic: $trait $(, $inst_generic: $instance)?> { pub enum $error<$generic: $trait $(, $inst_generic: $instance)?>
$( where $( $where_ty: $where_bound )* )?
{
#[doc(hidden)] #[doc(hidden)]
__Ignore( __Ignore(
$crate::sp_std::marker::PhantomData<($generic, $( $inst_generic)?)>, $crate::sp_std::marker::PhantomData<($generic, $( $inst_generic)?)>,
@@ -100,13 +103,16 @@ macro_rules! decl_error {
impl<$generic: $trait $(, $inst_generic: $instance)?> $crate::sp_std::fmt::Debug impl<$generic: $trait $(, $inst_generic: $instance)?> $crate::sp_std::fmt::Debug
for $error<$generic $(, $inst_generic)?> for $error<$generic $(, $inst_generic)?>
$( where $( $where_ty: $where_bound )* )?
{ {
fn fmt(&self, f: &mut $crate::sp_std::fmt::Formatter<'_>) -> $crate::sp_std::fmt::Result { fn fmt(&self, f: &mut $crate::sp_std::fmt::Formatter<'_>) -> $crate::sp_std::fmt::Result {
f.write_str(self.as_str()) f.write_str(self.as_str())
} }
} }
impl<$generic: $trait $(, $inst_generic: $instance)?> $error<$generic $(, $inst_generic)?> { impl<$generic: $trait $(, $inst_generic: $instance)?> $error<$generic $(, $inst_generic)?>
$( where $( $where_ty: $where_bound )* )?
{
fn as_u8(&self) -> u8 { fn as_u8(&self) -> u8 {
$crate::decl_error! { $crate::decl_error! {
@GENERATE_AS_U8 @GENERATE_AS_U8
@@ -130,6 +136,7 @@ macro_rules! decl_error {
impl<$generic: $trait $(, $inst_generic: $instance)?> From<$error<$generic $(, $inst_generic)?>> impl<$generic: $trait $(, $inst_generic: $instance)?> From<$error<$generic $(, $inst_generic)?>>
for &'static str for &'static str
$( where $( $where_ty: $where_bound )* )?
{ {
fn from(err: $error<$generic $(, $inst_generic)?>) -> &'static str { fn from(err: $error<$generic $(, $inst_generic)?>) -> &'static str {
err.as_str() err.as_str()
@@ -138,6 +145,7 @@ macro_rules! decl_error {
impl<$generic: $trait $(, $inst_generic: $instance)?> From<$error<$generic $(, $inst_generic)?>> impl<$generic: $trait $(, $inst_generic: $instance)?> From<$error<$generic $(, $inst_generic)?>>
for $crate::sp_runtime::DispatchError for $crate::sp_runtime::DispatchError
$( where $( $where_ty: $where_bound )* )?
{ {
fn from(err: $error<$generic $(, $inst_generic)?>) -> Self { fn from(err: $error<$generic $(, $inst_generic)?>) -> Self {
let index = <$generic::PalletInfo as $crate::traits::PalletInfo> let index = <$generic::PalletInfo as $crate::traits::PalletInfo>
@@ -154,6 +162,7 @@ macro_rules! decl_error {
impl<$generic: $trait $(, $inst_generic: $instance)?> $crate::error::ModuleErrorMetadata impl<$generic: $trait $(, $inst_generic: $instance)?> $crate::error::ModuleErrorMetadata
for $error<$generic $(, $inst_generic)?> for $error<$generic $(, $inst_generic)?>
$( where $( $where_ty: $where_bound )* )?
{ {
fn metadata() -> &'static [$crate::error::ErrorMetadata] { fn metadata() -> &'static [$crate::error::ErrorMetadata] {
&[ &[
substrate/frame/support/test/tests/instance.rs
+7
View File
@@ -81,6 +81,13 @@ mod module1 {
} }
} }
frame_support::decl_error! {
pub enum Error for Module<T: Trait<I>, I: Instance> where T::BlockNumber: From<u32> {
/// Test
Test,
}
}
frame_support::decl_event! { frame_support::decl_event! {
pub enum Event<T, I> where Phantom = std::marker::PhantomData<T> { pub enum Event<T, I> where Phantom = std::marker::PhantomData<T> {
_Phantom(Phantom), _Phantom(Phantom),