Enum linera_views::batch::WriteOperation

pub enum WriteOperation {
    Delete {
        key: Vec<u8>,
    },
    DeletePrefix {
        key_prefix: Vec<u8>,
    },
    Put {
        key: Vec<u8>,
        value: Vec<u8>,
    },
}

A write operation as requested by a view when it needs to persist staged changes. There are 3 possibilities for the batch:

• Deletion of a specific key.
• Deletion of all keys matching a specific prefix.
• Insertion or replacement of a key with a value.

Variants

Delete

Delete the given key.

Fields

key: Vec<u8>

The key that will be deleted.

DeletePrefix

Delete all the keys matching the given prefix.

Fields

key_prefix: Vec<u8>

The prefix of the keys to be deleted.

Put

Set or replace the value of a given key.

Fields

key: Vec<u8>

The key to be inserted or replaced.

value: Vec<u8>

The value to be inserted on the key.

Trait Implementations

impl Clone for WriteOperation

fn clone(&self) -> WriteOperation

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WriteOperation

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

Formats the value using the given formatter.

impl PartialEq for WriteOperation

fn eq(&self, other: &WriteOperation) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl WitLoad for WriteOperation

fn load<Instance>( memory: &Memory<'_, Instance>, location: GuestPointer, ) -> Result<Self, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Loads an instance of the type from the location in the guest’s memory.

fn lift_from<Instance>( _: <Self::Layout as Layout>::Flat, memory: &Memory<'_, Instance>, ) -> Result<Self, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Lifts an instance of the type from the flat_layout representation.

impl WitStore for WriteOperation

fn store<Instance>( &self, memory: &mut Memory<'_, Instance>, location: GuestPointer, ) -> Result<(), RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Stores the type at the location in the guest’s memory.

fn lower<Instance>( &self, memory: &mut Memory<'_, Instance>, ) -> Result<<Self::Layout as Layout>::Flat, RuntimeError>

where Instance: InstanceWithMemory, <Instance::Runtime as Runtime>::Memory: RuntimeMemory<Instance>,

Lowers the type into its flat layout representation.

impl WitType for WriteOperation

const SIZE: u32 = 20u32

The size of the type when laid out in memory.

type Layout = HCons<u8, <<HCons<Vec<u8>, HNil> as WitType>::Layout as Merge<<<HCons<Vec<u8>, HNil> as WitType>::Layout as Merge<<HCons<Vec<u8>, HCons<Vec<u8>, HNil>> as WitType>::Layout>>::Output>>::Output>

The layout of the type as fundamental types.

type Dependencies = HCons<Vec<u8>, HCons<Vec<u8>, HCons<Vec<u8>, HCons<Vec<u8>, HNil>>>>

Other WitTypes that this type depends on.

fn wit_type_name() -> Cow<'static, str>

Generates the WIT type name for this type.

fn wit_type_declaration() -> Cow<'static, str>

Generates the WIT type declaration for this type.

impl Eq for WriteOperation

impl StructuralPartialEq for WriteOperation