pezkuwichain/pezkuwi-subxt
1
0
Fork 0
mirror of https://github.com/pezkuwichain/pezkuwi-subxt.git synced 2026-04-27 17:28:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add mutate_exists to StorageDoubleMap. (#6704)

Browse Source
This commit is contained in:
Shaopeng Wang
2020-08-04 20:02:24 +12:00
committed by GitHub
parent c7d6a11460
commit 3a853d4dde
3 changed files with 33 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/support/src/storage/generator/double_map.rs
+9
View File
@@ -228,6 +228,15 @@ impl<K1, K2, V, G> storage::StorageDoubleMap<K1, K2, V> for G where
Self::try_mutate(k1, k2, |v| Ok::<R, Never>(f(v))).expect("`Never` can not be constructed; qed")
}
fn mutate_exists<KArg1, KArg2, R, F>(k1: KArg1, k2: KArg2, f: F) -> R
where
KArg1: EncodeLike<K1>,
KArg2: EncodeLike<K2>,
F: FnOnce(&mut Option<V>) -> R,
{
Self::try_mutate_exists(k1, k2, |v| Ok::<R, Never>(f(v))).expect("`Never` can not be constructed; qed")
}
fn try_mutate<KArg1, KArg2, R, E, F>(k1: KArg1, k2: KArg2, f: F) -> Result<R, E> where
KArg1: EncodeLike<K1>,
KArg2: EncodeLike<K2>,
substrate/frame/support/src/storage/mod.rs
+7
View File
@@ -366,6 +366,13 @@ pub trait StorageDoubleMap<K1: FullEncode, K2: FullEncode, V: FullCodec> {
KArg2: EncodeLike<K2>,
F: FnOnce(&mut Self::Query) -> Result<R, E>;
/// Mutate the value under the given keys. Deletes the item if mutated to a `None`.
fn mutate_exists<KArg1, KArg2, R, F>(k1: KArg1, k2: KArg2, f: F) -> R
where
KArg1: EncodeLike<K1>,
KArg2: EncodeLike<K2>,
F: FnOnce(&mut Option<V>) -> R;
/// Mutate the item, only if an `Ok` value is returned. Deletes the item if mutated to a `None`.
fn try_mutate_exists<KArg1, KArg2, R, E, F>(k1: KArg1, k2: KArg2, f: F) -> Result<R, E>
where