Trait frame_support::storage::TryAppendNMap

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

Storage N map that is capable of StorageTryAppend.

Required Methods

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

Try and append the item into the storage N 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, StorageNMapT> TryAppendNMap<K, T, I> for StorageNMapT

where K: KeyGenerator, T: FullCodec + StorageTryAppend<I>, I: Encode, StorageNMapT: StorageNMap<K, T>,