Trait pallet_roles::storage::TryAppendMap

pub trait TryAppendMap<K, T, I>where
    K: Encode,
    T: StorageTryAppend<I>,
    I: Encode,{
    fn try_append<LikeK, LikeI>(key: LikeK, item: LikeI) -> Result<(), ()>
    where
        LikeK: EncodeLike<K> + Clone,
        LikeI: EncodeLike<I>;
}

Storage map that is capable of StorageTryAppend.

Required Methods

fn try_append<LikeK, LikeI>(key: LikeK, item: LikeI) -> Result<(), ()>where
    LikeK: EncodeLike<K> + Clone,
    LikeI: EncodeLike<I>,

Try and append the item into the storage map at the given key.

This might fail if bounds are not respected.

Implementors

impl<K, T, I, StorageMapT> TryAppendMap<K, T, I> for StorageMapTwhere
    K: FullCodec,
    T: FullCodec + StorageTryAppend<I>,
    I: Encode,
    StorageMapT: StorageMap<K, T>,