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.

Object Safety

This trait is not object safe.

Implementors

impl<K, T, I, StorageMapT> TryAppendMap<K, T, I> for StorageMapT

where K: FullCodec, T: FullCodec + StorageTryAppend<I>, I: Encode, StorageMapT: StorageMap<K, T>,