Trait StorageDecodeNonDedupLength

pub trait StorageDecodeNonDedupLength: Sealed + DecodeLength {
    // Provided method
    fn decode_non_dedup_len(key: &[u8]) -> Option<usize> { ... }
}

It is expected that the length is at the beginning of the encoded object and that the length is a Compact<u32>.

Note

The length returned by this trait is not deduplicated, i.e. it is the length of the underlying stored Vec.

This trait is sealed.

Provided Methods

fn decode_non_dedup_len(key: &[u8]) -> Option<usize>

Decode the length of the storage value at key.

This function assumes that the length is at the beginning of the encoded object and is a Compact<u32>.

Returns None if the storage value does not exist or the decoding failed.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T: Encode> StorageDecodeNonDedupLength for BTreeSet<T>

Implementors

impl<T, S> StorageDecodeNonDedupLength for BoundedBTreeSet<T, S>

impl<T: StorageDecodeLength> StorageDecodeNonDedupLength for T