Trait frame_support::storage::TryAppendMap

source ·
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<(), ()>;
}
Expand description

Storage map that is capable of StorageTryAppend.

Required Methods§

source

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§

source§

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