Struct StorageSigned

pub struct StorageSigned<const B: usize, const L: usize>
where
    IntBitCount<B>: SupportedInt,
{ /* private fields */ }

Accessor for a storage-backed Signed.

Note: in the future L won’t be needed.

Implementations

impl<const B: usize, const L: usize> StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

pub fn get(&self) -> Signed<B, L>

Gets the underlying Signed in persistent storage.

pub fn set(&mut self, value: Signed<B, L>)

Gets the underlying Signed in persistent storage.

Trait Implementations

impl<const B: usize, const L: usize> Debug for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<const B: usize, const L: usize> Erase for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

fn erase(&mut self)

Erase the value from persistent storage.

impl<const B: usize, const L: usize, T> From<&T> for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt, T: Host + Clone + 'static,

fn from(host: &T) -> Self

Converts to this type from the input type.

impl<const B: usize, const L: usize> From<StorageSigned<B, L>> for Signed<B, L>

where IntBitCount<B>: SupportedInt,

fn from(value: StorageSigned<B, L>) -> Self

Converts to this type from the input type.

impl<const B: usize, const L: usize> HostAccess for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

fn vm(&self) -> &dyn Host

Provides access to the parametrized host of a contract, giving access to all the desired hostios from the user.

impl<'a, const B: usize, const L: usize> SimpleStorageType<'a> for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

fn set_by_wrapped(&mut self, value: Self::Wraps<'a>)

Write the value to persistent storage.

impl<const B: usize, const L: usize> StorageType for StorageSigned<B, L>

where IntBitCount<B>: SupportedInt,

const SLOT_BYTES: usize

The number of bytes in a slot needed to represent the type. Must not exceed 32. For types larger than 32 bytes that are stored inline with a struct’s fields, set this to 32 and return the full size in StorageType::new.

type Wraps<'a> = Signed<B, L>

For primitive types, this is the type being stored. For collections, this is the StorageType being collected.

type WrapsMut<'a> = StorageGuardMut<'a, StorageSigned<B, L>>

Mutable accessor to the type being stored.

unsafe fn new(slot: U256, offset: u8, host: VM) -> Self

Where in persistent storage the type should live. Although useful for framework designers creating new storage types, most user programs shouldn’t call this. Note: implementations will have to be const once generic_const_exprs stabilizes.

fn load<'s>(self) -> Self::Wraps<'s>

Load the wrapped type, consuming the accessor. Note: most types have a get and/or getter, which don’t consume Self.

fn load_mut<'s>(self) -> Self::WrapsMut<'s>

Load the wrapped mutable type, consuming the accessor. Note: most types have a set and/or setter, which don’t consume Self.

const REQUIRED_SLOTS: usize = 0usize

The number of words this type must fill. For primitives this is always 0. For complex types requiring more than one inline word, set this to the total size.