Struct ListFile 

pub struct ListFile<T> {
    pub version: u32,
    pub items: Vec<T>,
}

On-disk shape for a persisted list: a versioned wrapper around Vec<T>. Apps write migrations against this type, not the bare Vec.

Fields

version: u32

Schema version, matched against Versioned::CURRENT_VERSION on load to run any registered migrations before deserialization.

items: Vec<T>

The ordered list of items as stored on disk.

Trait Implementations

impl<T: Clone> Clone for ListFile<T>

fn clone(&self) -> ListFile<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for ListFile<T>

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

Formats the value using the given formatter.

impl<T> Default for ListFile<T>

fn default() -> Self

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for ListFile<T>

where T: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Serialize for ListFile<T>

where T: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: 'static> Versioned for ListFile<T>

T doesn’t carry a version itself; the wrapper does. This impl is parameterized on the version a particular app uses by way of the Versioned for ListFile<T> instance the app produces. We provide a default CURRENT_VERSION = 1; apps that bump the schema replace the impl via newtype.

const CURRENT_VERSION: u32 = 1

The version this build understands. Bump when the schema changes in a way that requires migration.

fn version(&self) -> u32

The version embedded in this instance.

fn set_version(&mut self, v: u32)

Write a new version into this instance. Used by the migrator after a successful chain of steps.