Trait frame_support::storage::TryAppendMap

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

Storage map that is capable of StorageTryAppend.

Required Methods

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

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>,