Enum tinychain::state::State

pub enum State {
    Chain(Chain),
    Map(Map<Self>),
    Object(Object),
    Scalar(Scalar),
    Tuple(Tuple<Self>),
}

An addressable state with a discrete value per-transaction.

Variants

Chain(Chain)

Map(Map<Self>)

Object(Object)

Scalar(Scalar)

Tuple(Tuple<Self>)

Implementations

impl State

pub fn is_none(&self) -> bool

Return true if this State is an empty Tuple or Map, default Link, or Value::None

pub fn is_some(&self) -> bool

Return false if this State is an empty Tuple or Map, default Link, or Value::None

pub fn is_ref(&self) -> bool

Return true if this State is a reference that needs to be resolved.

pub fn into_type(self, class: StateType) -> Option<Self>

Cast this State into the given StateType, if possible.

Trait Implementations

impl Clone for State

fn clone(&self) -> State

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for State

fn default() -> Self

Returns the “default value” for a type.

impl Display for State

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

Formats the value using the given formatter.

impl From<()> for State

fn from(_: ()) -> State

Performs the conversion.

impl From<Box<TCRef, Global>> for State

fn from(tc_ref: Box<TCRef>) -> Self

Performs the conversion.

impl From<Chain> for State

fn from(chain: Chain) -> Self

Performs the conversion.

impl<T: Instance> From<InstanceExt<T>> for State where
    State: From<T>, 

fn from(instance: InstanceExt<T>) -> State

Performs the conversion.

impl From<Link> for State

fn from(link: Link) -> Self

Performs the conversion.

impl From<Map<Scalar>> for State

fn from(map: Map<Scalar>) -> State

Performs the conversion.

impl From<Map<State>> for State

fn from(map: Map<State>) -> State

Performs the conversion.

impl From<OpRef> for State

fn from(op_ref: OpRef) -> Self

Performs the conversion.

impl From<Scalar> for State

fn from(scalar: Scalar) -> State

Performs the conversion.

impl From<TCRef> for State

fn from(tc_ref: TCRef) -> Self

Performs the conversion.

impl From<Tuple<Scalar>> for State

fn from(tuple: Tuple<Scalar>) -> Self

Performs the conversion.

impl From<Tuple<State>> for State

fn from(tuple: Tuple<State>) -> Self

Performs the conversion.

impl From<Tuple<Value>> for State

fn from(tuple: Tuple<Value>) -> Self

Performs the conversion.

impl From<Value> for State

fn from(value: Value) -> State

Performs the conversion.

impl FromStream for State

type Context = Txn

The decoding context of this type, useful in situations where the stream to be decoded may be too large to hold in main memory.

fn from_stream<'life0, 'async_trait, D: Decoder>(
    txn: Txn,
    decoder: &'life0 mut D
) -> Pin<Box<dyn Future<Output = Result<Self, D::Error>> + Send + 'async_trait>> where
    D: 'async_trait,
    'life0: 'async_trait,
    Self: 'async_trait, 

Parse this value using the given Decoder.

impl Instance for State

type Class = StateType

The Class type of this instance

fn class(&self) -> StateType

Returns the [Class] of this instance.

impl Refer for State

fn requires(&self, deps: &mut HashSet<Id>)

Add the dependency Ids of this reference to the given set.

fn resolve<'a, 'async_trait, T: Instance + Public>(
    self,
    context: &'a Scope<'a, T>,
    txn: &'a Txn
) -> Pin<Box<dyn Future<Output = TCResult<Self>> + Send + 'async_trait>> where
    'a: 'async_trait,
    T: 'async_trait,
    Self: 'async_trait, 

Resolve this reference with respect to the given context.

impl<T: Clone + TryCastFrom<State>> TryCastFrom<State> for Map<T>

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for IdRef

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for Link

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for OpDef

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for OpRef

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for Scalar

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryCastFrom<State> for Value

fn can_cast_from(state: &State) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State) -> Option<Self>

Returns Some(Self) if the source value can be cast into Self, otherwise None.

pub fn try_cast_from<Err, OnErr>(value: T, on_err: OnErr) -> Result<Self, Err> where
    OnErr: FnOnce(&T) -> Err, 

Returns Ok(Self) if the source value can be cast into Self, otherwise calls on_err.

impl TryFrom<State> for Map<State>

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State) -> TCResult<Map<State>>

Performs the conversion.

impl TryFrom<State> for Value

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State) -> TCResult<Value>

Performs the conversion.