Struct StableBTreeSet 

pub struct StableBTreeSet<K: Storable + Ord + Clone, M: Memory = DefaultMemoryImpl> { /* private fields */ }

Governed ordered set sharing Storage’s owned map engine with unit values.

Implementations

impl<K: Storable + Ord + Clone, M: Memory> StableBTreeSet<K, M>

pub fn create(memory: RuntimeMemory<M>) -> Result<Self, CollectionError>

Create a collection only in zero-page memory.

Errors

Refuses nonempty memory or initial growth refusal; engine failures trap.

pub fn reset(memory: RuntimeMemory<M>) -> Result<Self, CollectionError>

Deliberately replace any contents in this admitted allocation.

Errors

Returns initial growth refusal; engine failures trap.

pub fn load(memory: RuntimeMemory<M>) -> Result<Self, CollectionError>

Load retained collection state without initializing a replacement.

Errors

Refuses empty or foreign framing; malformed engine state traps.

pub fn insert(&mut self, key: K) -> Result<bool, CollectionError>

Perform insert on the governed ordered set.

Errors

Engine and codec failures trap, possibly after writes on native hosts.

pub fn contains(&self, key: &K) -> Result<bool, CollectionError>

Perform contains on the governed ordered set.

Errors

Engine and codec failures trap instead of returning an ordinary error.

pub const fn is_empty(&self) -> bool

Perform is_empty on the governed ordered set.

pub const fn len(&self) -> u64

Perform len on the governed ordered set.

pub fn remove(&mut self, key: &K) -> Result<bool, CollectionError>

Perform remove on the governed ordered set.

Errors

Engine and codec failures trap, possibly after writes on native hosts.

pub fn iter(&self) -> SetIter<'_, K, M>

Perform iter on the governed ordered set.

Trait Implementations

impl<'a, K: Storable + Ord + Clone, M: Memory> IntoIterator for &'a StableBTreeSet<K, M>

type Item = Result<K, CollectionError>

The type of the elements being iterated over.

type IntoIter = SetIter<'a, K, M>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.