Enum State

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

An addressable state with a discrete value per-transaction.

Variants

Closure(Closure<Txn>)

Map(Map<Self>)

Object(Object<Txn>)

Scalar(Scalar)

Tuple(Tuple<Self>)

Implementations

impl<Txn> State<Txn>

pub const PREFIX: Label

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 try_into_map<Err, OnErr: Fn(Self) -> Err>( self, err: OnErr, ) -> Result<Map<Self>, Err>

Return this State as a Map of States, or an error if this is not possible.

pub fn try_into_tuple<Err: Fn(Self) -> TCError>( self, err: Err, ) -> TCResult<Tuple<Self>>

Return this State as a Map of States, or an error if this is not possible.

impl<Txn> State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<Self>,

pub fn is_ref(&self) -> bool

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

Trait Implementations

impl<Txn> AsyncHash for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<Self>,

fn hash<'life0, 'async_trait>( &'life0 self, txn_id: TxnId, ) -> Pin<Box<dyn Future<Output = TCResult<Output<Sha256>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Compute the hash of this state as of a given TxnId

impl<Txn, T1> CastFrom<(T1,)> for State<Txn>

where Self: CastFrom<T1>,

fn cast_from(value: (T1,)) -> Self

Cast an instance of T into an instance of Self.

impl<Txn, T1, T2> CastFrom<(T1, T2)> for State<Txn>

where Self: CastFrom<T1> + CastFrom<T2>,

fn cast_from(value: (T1, T2)) -> Self

Cast an instance of T into an instance of Self.

impl<Txn, T1, T2, T3> CastFrom<(T1, T2, T3)> for State<Txn>

where Self: CastFrom<T1> + CastFrom<T2> + CastFrom<T3>,

fn cast_from(value: (T1, T2, T3)) -> Self

Cast an instance of T into an instance of Self.

impl<Txn, T1, T2, T3, T4> CastFrom<(T1, T2, T3, T4)> for State<Txn>

where Self: CastFrom<T1> + CastFrom<T2> + CastFrom<T3> + CastFrom<T4>,

fn cast_from(value: (T1, T2, T3, T4)) -> Self

Cast an instance of T into an instance of Self.

impl<Txn> Clone for State<Txn>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Txn> ClosureInstance<State<Txn>> for Closure<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn call<'async_trait>( self: Box<Self>, txn: Txn, args: State<Txn>, ) -> Pin<Box<dyn Future<Output = TCResult<State<Txn>>> + Send + 'async_trait>>

where Self: 'async_trait,

Execute this ClosureInstance with the given args

impl<Txn> Debug for State<Txn>

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

Formats the value using the given formatter.

impl<Txn> Default for State<Txn>

fn default() -> Self

Returns the “default value” for a type.

impl<Txn> From<()> for State<Txn>

fn from(_: ()) -> Self

Converts to this type from the input type.

impl<Txn> From<Box<TCRef>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Closure<Txn>> for State<Txn>

fn from(closure: Closure<Txn>) -> Self

Converts to this type from the input type.

impl<Txn> From<Host> for State<Txn>

fn from(host: Host) -> Self

Converts to this type from the input type.

impl<Txn> From<Id> for State<Txn>

fn from(id: Id) -> Self

Converts to this type from the input type.

impl<Txn> From<InstanceClass> for State<Txn>

fn from(class: InstanceClass) -> Self

Converts to this type from the input type.

impl<Txn> From<Link> for State<Txn>

fn from(link: Link) -> Self

Converts to this type from the input type.

impl<Txn> From<Map<InstanceClass>> for State<Txn>

fn from(map: Map<InstanceClass>) -> Self

Converts to this type from the input type.

impl<Txn> From<Map<Scalar>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Map<State<Txn>>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Number> for State<Txn>

fn from(n: Number) -> Self

Converts to this type from the input type.

impl<Txn> From<Object<Txn>> for State<Txn>

fn from(object: Object<Txn>) -> Self

Converts to this type from the input type.

impl<Txn> From<OpDef> for State<Txn>

fn from(op_def: OpDef) -> Self

Converts to this type from the input type.

impl<Txn> From<OpRef> for State<Txn>

fn from(op_ref: OpRef) -> Self

Converts to this type from the input type.

impl<Txn, T> From<Option<T>> for State<Txn>

where State<Txn>: From<T>,

fn from(state: Option<T>) -> Self

Converts to this type from the input type.

impl<Txn> From<Scalar> for State<Txn>

fn from(scalar: Scalar) -> Self

Converts to this type from the input type.

impl<Txn> From<StateType> for State<Txn>

fn from(class: StateType) -> Self

Converts to this type from the input type.

impl<Txn> From<TCRef> for State<Txn>

fn from(tc_ref: TCRef) -> Self

Converts to this type from the input type.

impl<Txn> From<Tuple<Scalar>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Tuple<State<Txn>>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Tuple<Value>> for State<Txn>

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

Converts to this type from the input type.

impl<Txn> From<Value> for State<Txn>

fn from(value: Value) -> Self

Converts to this type from the input type.

impl<Txn> From<bool> for State<Txn>

fn from(b: bool) -> Self

Converts to this type from the input type.

impl<Txn> From<i64> for State<Txn>

fn from(n: i64) -> Self

Converts to this type from the input type.

impl<Txn> From<u64> for State<Txn>

fn from(n: u64) -> Self

Converts to this type from the input type.

impl<Txn> From<usize> for State<Txn>

fn from(n: usize) -> Self

Converts to this type from the input type.

impl<Txn> FromStream for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

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

where D: 'async_trait + Decoder, Self: 'async_trait, 'life0: 'async_trait,

Parse this value using the given Decoder.

impl<'a, Txn> Handler<'a, State<Txn>> for Closure<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn get<'b>(self: Box<Self>) -> Option<GetHandler<'a, 'b, Txn, State<Txn>>>

where 'b: 'a,

fn put<'b>(self: Box<Self>) -> Option<PutHandler<'a, 'b, Txn, State<Txn>>>

where 'b: 'a,

fn post<'b>(self: Box<Self>) -> Option<PostHandler<'a, 'b, Txn, State<Txn>>>

where 'b: 'a,

fn delete<'b>(self: Box<Self>) -> Option<DeleteHandler<'a, 'b, Txn>>

where 'b: 'a,

impl<Txn> Instance for State<Txn>

where Txn: Send + Sync,

type Class = StateType

The Class type of this instance

fn class(&self) -> StateType

Returns the [Class] of this instance.

impl<'en, Txn> IntoView<'en, CacheBlock> for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

type Txn = Txn

The type of Transaction which this state supports

type View = StateView<'en>

The type of encodable view returned by into_view

fn into_view<'async_trait>( self, txn: Self::Txn, ) -> Pin<Box<dyn Future<Output = TCResult<Self::View>> + Send + 'async_trait>>

where Self: 'async_trait,

Return a View which can be encoded with en::IntoStream.

impl<Txn> Refer<State<Txn>> for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<Self>,

fn dereference_self(self, path: &TCPathBuf) -> Self

Replace references to “$self” with the given relative path.

fn is_conditional(&self) -> bool

Return true if this is a conditional reference (e.g. If or Case).

fn is_inter_service_write(&self, cluster_path: &[PathSegment]) -> bool

Return true if this references a write operation to a cluster other than the path given.

fn is_ref(&self) -> bool

Return true if this state is a resolvable reference.

fn reference_self(self, path: &TCPathBuf) -> Self

Replace the given relative path with “$self”.

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

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

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

where T: 'async_trait + ToState<Self> + Instance + Public<Self>, Self: 'async_trait, 'a: 'async_trait,

Resolve this reference with respect to the given context.

impl<Txn> Route<State<Txn>> for InstanceClass

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn, T> Route<State<Txn>> for InstanceExt<Txn, T>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>, T: ToState<State<Txn>> + Instance + Route<State<Txn>> + Debug, Self: ToState<State<Txn>>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> Route<State<Txn>> for Object<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> Route<State<Txn>> for ObjectType

fn route<'a>( &'a self, _path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> Route<State<Txn>> for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<Self>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> Route<State<Txn>> for StateType

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> Route<State<Txn>> for Static<Txn>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn route<'a>( &'a self, path: &'a [PathSegment], ) -> Option<Box<dyn Handler<'a, State<Txn>> + 'a>>

impl<Txn> StateInstance for State<Txn>

where Txn: Transaction<CacheBlock> + Gateway<Self>,

type FE = CacheBlock

type Txn = Txn

type Closure = Closure<Txn>

fn is_map(&self) -> bool

Return true if this is a Map of states.

fn is_tuple(&self) -> bool

Return true if this is a Tuple of states.

impl<Txn, T> ToState<State<Txn>> for InstanceExt<Txn, T>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>, T: Instance + ToState<State<Txn>>,

fn to_state(&self) -> State<Txn>

impl<Txn, T> TryCastFrom<State<Txn>> for (T,)

where T: TryCastFrom<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T1, T2> TryCastFrom<State<Txn>> for (T1, T2)

where T1: TryCastFrom<State<Txn>>, T2: TryCastFrom<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T1, T2, T3> TryCastFrom<State<Txn>> for (T1, T2, T3)

where T1: TryCastFrom<State<Txn>>, T2: TryCastFrom<State<Txn>>, T3: TryCastFrom<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Box<dyn ClosureInstance<State<Txn>>>

where Txn: Transaction<CacheBlock> + Gateway<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Bytes

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Closure<Txn>

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Float

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Host

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Id

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for IdRef

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for InstanceClass

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

fn opt_cast_from(state: State<Txn>) -> Option<InstanceClass>

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

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<Txn> TryCastFrom<State<Txn>> for Link

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T> TryCastFrom<State<Txn>> for Map<T>

where T: TryCastFrom<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Number

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for OpDef

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for OpRef

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Scalar

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for TCPathBuf

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for TCString

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T> TryCastFrom<State<Txn>> for Tuple<T>

where T: TryCastFrom<State<Txn>>,

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for Value

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T: TryCastFrom<State<Txn>>> TryCastFrom<State<Txn>> for Vec<T>

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for bool

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for u64

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn> TryCastFrom<State<Txn>> for usize

fn can_cast_from(state: &State<Txn>) -> bool

Test if value can be cast into Self.

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

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

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<Txn, T> TryFrom<State<Txn>> for (Id, T)

where T: TryFrom<State<Txn>> + TryFrom<Scalar>, TCError: From<<T as TryFrom<State<Txn>>>::Error> + From<<T as TryFrom<Scalar>>::Error>,

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State<Txn>) -> TCResult<Self>

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Id

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State<Txn>) -> TCResult<Id>

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Map<Scalar>

type Error = TCError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Map<State<Txn>>

type Error = TCError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Map<Value>

type Error = TCError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Scalar

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State<Txn>) -> TCResult<Self>

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Tuple<State<Txn>>

where Txn: Send + Sync,

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State<Txn>) -> Result<Self, Self::Error>

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for Value

type Error = TCError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<Txn> TryFrom<State<Txn>> for bool

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(state: State<Txn>) -> Result<Self, Self::Error>

Performs the conversion.