Struct EngineGeneration 

pub struct EngineGeneration(/* private fields */);

A generation counter that makes the otherwise-untracked runtime engine model invalidate correctly. The engine model is a leaked &'static side handle (not a salsa input), so a query memoized while it was still absent (engine() == None, on wasm32 before set_engine_api) would otherwise return that stale empty result forever. Every engine() read records a dependency on this input; set_engine_api bumps it, recomputing those queries. The value is irrelevant — only that setting it advances the revision. Used on wasm32 only (native has the bundled model from the start, so it never changes — no generation tracking, no overhead).

Implementations

impl EngineGeneration

pub fn ingredient(db: &dyn Database) -> &IngredientImpl<Self>

pub fn ingredient_mut( zalsa_mut: &mut Zalsa, ) -> (&mut IngredientImpl<Self>, &mut Runtime)

impl EngineGeneration

pub fn new<Db_>(db: &Db_, generation: u32) -> Self

where Db_: ?Sized + Database,

pub fn builder(generation: u32) -> <Self as HasBuilder>::Builder

pub fn generation<'db, Db_>(self, db: &'db Db_) -> u32

where Db_: ?Sized + Database,

An opaque counter (only its revision matters).

pub fn set_generation<'db, Db_>( self, db: &'db mut Db_, ) -> impl Setter<FieldTy = u32>

where Db_: ?Sized + Database,

pub fn default_debug_fmt(this: Self, f: &mut Formatter<'_>) -> Result

where for<'__trivial_bounds> u32: Debug,

Default debug formatting for this struct (may be useful if you define your own Debug impl)

Trait Implementations

impl AsId for EngineGeneration

fn as_id(&self) -> Id

impl Clone for EngineGeneration

fn clone(&self) -> EngineGeneration

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Configuration for EngineGeneration

const LOCATION: Location

const DEBUG_NAME: &'static str = "EngineGeneration"

const FIELD_DEBUG_NAMES: &'static [&'static str]

const PERSIST: bool = false

Whether this struct should be persisted with the database.

type Singleton = NotSingleton

The singleton state for this input if any.

type Struct = EngineGeneration

The input struct (which wraps an Id)

type Fields = (u32,)

A (possibly empty) tuple of the fields for this struct.

type Revisions = [Revision; 1]

Available on non-crate feature persistence only.

type Durabilities = [Durability; 1]

Available on non-crate feature persistence only.

fn serialize<S: Serializer>( fields: &Self::Fields, serializer: S, ) -> Result<S::Ok, S::Error>

Serialize the fields using serde.

fn deserialize<'de, D: Deserializer<'de>>( deserializer: D, ) -> Result<Self::Fields, D::Error>

Deserialize the fields using serde.

fn heap_size(_value: &Self::Fields) -> Option<usize>

Returns the size of any heap allocations in the output value, in bytes.

impl Copy for EngineGeneration

impl Eq for EngineGeneration

impl FromId for EngineGeneration

fn from_id(id: Id) -> Self

impl HasBuilder for EngineGeneration

type Builder = Builder_

impl HasJar for EngineGeneration

const KIND: JarKind = zalsa_::JarKind::Struct

The [JarKind] for Self::Jar.

type Jar = JarImpl<EngineGeneration>

The [Jar] associated with this ingredient.

impl Hash for EngineGeneration

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for EngineGeneration

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl SalsaStructInDb for EngineGeneration

const LEAF_TYPE_IDS: &'static [ConstTypeId]

The type IDs of all concrete (leaf) salsa struct types that this type can contain.

type MemoIngredientMap = MemoIngredientSingletonIndex

fn lookup_ingredient_index(aux: &Zalsa) -> IngredientIndices

Lookup or create ingredient indices.

fn entries(zalsa: &Zalsa) -> impl Iterator<Item = DatabaseKeyIndex> + '_

Returns the IDs of any instances of this struct in the database.

fn cast(id: Id, type_id: TypeId) -> Option<Self>

Plumbing to support nested salsa supertypes.

unsafe fn memo_table( zalsa: &Zalsa, id: Id, current_revision: Revision, ) -> MemoTableWithTypes<'_>

Return the memo table associated with id.

impl StructuralPartialEq for EngineGeneration

impl Update for EngineGeneration

unsafe fn maybe_update(old_pointer: *mut Self, new_value: Self) -> bool

Returns