Struct MemoryVault 

pub struct MemoryVault { /* private fields */ }

RAM-only vault: nothing touches disk and everything is lost on restart.

Implementations

impl MemoryVault

pub fn len(&self) -> usize

How many values it holds.

pub fn is_empty(&self) -> bool

True if it holds no values.

pub fn oldest_created_at(&self) -> Option<i64>

Unix seconds when the oldest value it holds was added.

pub fn clear(&self)

Forgets every value. Numbers already handed out are never given to another value, so an old placeholder can’t restore to the wrong one.

pub fn adopt(&self, from: &ScopeId, into: &ScopeId) -> bool

Copies every value of from into into under the same numbers, so placeholders made in from mean the same in into. Only done while into has never handed out or reserved a number; otherwise copies nothing and returns false.

Trait Implementations

impl Default for MemoryVault

fn default() -> Self

Returns the “default value” for a type.

impl Vault for MemoryVault

fn get_or_create( &self, scope: &ScopeId, kind: &EntityKind, value: &str, ) -> Result<u64, VaultError>

Returns the placeholder number for value, creating one if needed. The same value of the same kind in the same scope always gets the same number.

fn lookup( &self, scope: &ScopeId, kind: &EntityKind, n: u64, ) -> Result<Option<String>, VaultError>

Returns the value behind placeholder number n, if this scope knows it.

fn reserve( &self, scope: &ScopeId, kind: &EntityKind, n: u64, ) -> Result<(), VaultError>

Makes sure number n is never handed out for a new value. Used for placeholder-shaped text the user wrote themselves.