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Implement () for Happened (#6529)

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chenwei
2020-06-29 02:17:15 +08:00
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parent f1bd59c6a9
commit 749cc1fd34
1 changed files with 4 additions and 0 deletions
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substrate/frame/support/src/traits.rs
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@@ -329,6 +329,10 @@ pub trait Happened<T> {
fn happened(t: &T);
}
impl<T> Happened<T> for () {
fn happened(_: &T) {}
}
/// A shim for placing around a storage item in order to use it as a `StoredValue`. Ideally this
/// wouldn't be needed as `StorageValue`s should blanket implement `StoredValue`s, however this
/// would break the ability to have custom impls of `StoredValue`. The other workaround is to