Struct Set 

pub struct Set<T> { /* private fields */ }

A set whose concurrent adds and removes merge per element. Stored as a map keyed by each element’s JSON form.

Implementations

impl<T> Set<T>

where T: Model,

pub fn new() -> Set<T>

pub fn insert(&mut self, value: T) -> bool

Add value; returns whether it was absent.

pub fn remove(&mut self, value: &T) -> bool

Remove value; returns whether it was present.

pub fn contains(&self, value: &T) -> bool

impl<T> Set<T>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn iter(&self) -> impl ExactSizeIterator

The elements, ordered by their stored keys.

Trait Implementations

impl<T> Clone for Set<T>

where T: Clone,

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for Set<T>

where T: Debug,

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

Formats the value using the given formatter.

impl<T> Default for Set<T>

fn default() -> Set<T>

Returns the “default value” for a type.

impl<T> FromIterator<T> for Set<T>

where T: Model,

fn from_iter<I>(iter: I) -> Set<T>

where I: IntoIterator<Item = T>,

Creates a value from an iterator.

impl<T> Model for Set<T>

where T: Model,

const CHECKS: bool = T::CHECKS

Whether this type or any value inside it has a #[model(check)] invariant; Self::check has nothing to do otherwise.

const OPS: bool = T::OPS

Whether this type or a value inside it has a vocabulary of its own (Operations, rich text’s): a record routes those edits’ gestures, landing places and schemas only into such fields, and never instantiates the routing for the others.

const TABLE: &'static ModelTable

The type’s functions as data, which a record holding it reaches it through ([crate::table]): by default its own functions, erased.

type Paths<R> = Path<R, Set<T>>

The typed paths into a value of this type, rooted in the record R: a struct of field paths for a record, the Path itself for a value edited whole or through its own operations.

fn value_schema() -> Value

The JSON Schema of this value’s JSON form (Self::to_json), as the published field edit describes what a path takes; the default accepts any value.

fn paths_at<R>(path: Path<R, Set<T>>) -> Path<R, Set<T>>

The paths of the value at path.

fn op_coalesces( path: &[Segment], previous: &Value, next: &Value, ) -> Option<bool>

Whether two edits in the own vocabulary of the value at path below this type are one gesture (Operations); None when nothing there has one.

fn op_continuable(path: &[Segment], op: &Value) -> Option<bool>

Whether a gesture may go on after the edit op at path.

fn op_describe(path: &[Segment], op: &Value) -> Option<OpDescription>

What the edit op at path below this type did, in the history entry’s terms (Operations::describe).

fn op_lands(&self, path: &[Segment], op: &Value) -> Option<Place>

Where the actor of the edit op at path below this value is after it applied.

fn op_schemas(prefix: &str, out: &mut Vec<(String, Value)>)

The schemas of the own vocabularies of the values below this type, by path pattern from prefix (* for every item).

fn to_json(&self) -> Value

The value as JSON: what [EditOp::Set] carries and history shows.

fn from_json(value: &Value) -> Result<Set<T>, ModelError>

A value from its Self::to_json form.

fn edit( doc: &mut AutoCommit, slot: Slot<'_>, path: &[Segment], op: &EditOp, cx: &mut ActionCx, ) -> Result<(), ModelError>

Apply the field edit op at path, below the value in slot, touching only what it changes, then run the invariants of the values it touched. The default edits a value only as a whole.

fn check(&self) -> Result<(), Refusal>

Run every #[model(check)] invariant of this value and the values inside it.

fn get_at(&self, path: &[Segment]) -> Option<&(dyn Any + 'static)>

The value at path below this one, if it is there. A value with nothing inside it is found only at the empty path.

fn diff<R>(&self, after: &Set<T>, path: &[Segment], out: &mut Vec<Edit<R>>)

The field edits that turn self into after, at path below the record: what a surface that edited a local copy submits. The default sets the value whole when it changed; containers and records edit only what differs, item by item and field by field.

fn load( doc: &AutoCommit, value: &Value<'_>, id: &ExId, ) -> Result<Set<T>, ModelError>

Read from the value a parent found in its slot.

fn store(&self, doc: &mut AutoCommit, slot: Slot<'_>) -> Result<(), ModelError>

Write self into slot, changing only what differs from what the slot already holds.

fn stores_as(&self, before: &Set<T>) -> bool

Whether writing self over a slot that holds before, as a store left it, would change nothing: an in-memory comparison, so an action that changed one item of a long collection does not visit the others. Must only answer true when store would write no operation; the default answers false (unknown).

fn store_changed( &self, before: &Set<T>, doc: &mut AutoCommit, slot: Slot<'_>, dirty: &Delta, ) -> Result<(), ModelError>

Write self into slot, which holds before: exactly the operations store would write, found by comparing with before where store would read the document.

fn refresh( &mut self, doc: &AutoCommit, value: &Value<'_>, id: &ExId, delta: &Delta, ) -> Result<(), ModelError>

Bring a value read earlier up to date after the changes in delta, re-reading only what they touched. value and id are what the parent’s slot holds now — the same object as when self was read, or the parent would have read it anew. The default reads the value again, which is right for scalars and short values.

fn collect_text(&self, out: &mut Vec<String>)

Append the human-readable text this value carries, for search indexing.

fn missing() -> Result<Set<T>, ModelError>

The value of an absent slot. Types with a natural empty value return it, so a field added to a schema reads older documents without migration.

const SHAPE: Shape = crate::Shape::Value

How the value is laid out in the document; see Shape. Types written whole keep the default.

const NULLABLE: bool = false

Whether null is a value of the type: an absent Option. A field edit setting any other type to null is refused.

const SCALAR: bool = false

Whether store writes one scalar, with nothing inside it that a concurrent writer could add to. A record made just now leaves out such a field holding its missing value: an absent key reads as it. An object (text, a map, a list) is always made with its record, so two writers fill the same one.

fn nested_collections(&self) -> Vec<ItemCollection>

The item collections inside this value, when it is an item of a collection itself (a slide’s elements); #[derive(Model)] lists a record’s, the default has none.

fn read_whole(&mut self, doc: &AutoCommit) -> Result<(), ModelError>

Read everything this value holds, for a field marked #[model(whole)]: a value read lazily (rich text reads its paragraphs as views ask for them) reads all of it, so every reader of the record — a verb, search, read_content — sees all of it. The default has nothing more to read.

fn label(&self) -> Option<String>

What names this value for people (#[model(label)]): history, search, agents and item resources use it.

impl<T> PartialEq for Set<T>

where T: PartialEq,

fn eq(&self, other: &Set<T>) -> 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.