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Tadeo hepperle
2024-02-16 18:36:57 +01:00
parent 0a471e2039
commit 81c145db1e
1 changed files with 2 additions and 5 deletions
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subxt/src/config/extrinsic_params.rs
+2 -5
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@@ -83,7 +83,7 @@ pub trait ExtrinsicParamsEncoder: 'static {
/// Like the `From<T>` trait, if value is Some(_), but it lets us circumvent the orphan rule, because we want to implement /// Like the `From<T>` trait, if value is Some(_), but it lets us circumvent the orphan rule, because we want to implement
/// `DefaultOrFrom<Header>` for `()`, such that DefaultOrFrom<Header> is implemented by `((),(),(),CheckMortalityParams)`, if `CheckMortalityParams` implements `DefaultFrom<Header>` /// `DefaultOrFrom<Header>` for `()`, such that DefaultOrFrom<Header> is implemented by `((),(),(),CheckMortalityParams)`, if `CheckMortalityParams` implements `DefaultFrom<Header>`
pub trait DefaultOrFrom<T> { pub trait DefaultOrFrom<T> {
/// If value /// If value is None, Self is constructed as some default value. Otherwise it takes the value of `T` into account.
fn default_or_from(value: Option<&T>) -> Self; fn default_or_from(value: Option<&T>) -> Self;
} }
@@ -93,9 +93,6 @@ impl<T> DefaultOrFrom<T> for () {
macro_rules! impl_default_from_tuples { macro_rules! impl_default_from_tuples {
($($ident:ident),+) => { ($($ident:ident),+) => {
// We do some magic when the tuple is wrapped in AnyOf. We
// look at the metadata, and use this to select and make use of only the extensions
// that we actually need for the chain we're dealing with.
impl <T, $($ident),+> DefaultOrFrom<T> for ($($ident,)+) impl <T, $($ident),+> DefaultOrFrom<T> for ($($ident,)+)
where where
$($ident: DefaultOrFrom<T>,)+ $($ident: DefaultOrFrom<T>,)+
@@ -109,7 +106,7 @@ macro_rules! impl_default_from_tuples {
} }
} }
// Note: these implementations are necessary for AnyOf to work properly where arbitrary tuples are the `OtherParams`. // Note: these implementations are necessary, such that `DefaultOrFrom` works with `AnyOf` where arbitrary tuples are the `OtherParams`.
#[rustfmt::skip] #[rustfmt::skip]
const _: () = { const _: () = {
impl_default_from_tuples!(A); impl_default_from_tuples!(A);