Enum tinychain::scalar::Value

pub enum Value {
    Bytes(Bytes),
    Link(Link),
    Id(Id),
    None,
    Number(Number),
    String(String),
    Tuple(Tuple<Value>),
}

A generic value enum

Variants

Bytes(Bytes)

Link(Link)

Id(Id)

None

Number(Number)

String(String)

Tuple(Tuple<Value>)

Implementations

impl Value

pub fn expect_none(&self) -> Result<(), TCError>

pub fn is_none(&self) -> bool

pub fn is_some(&self) -> bool

pub fn into_type(self, class: ValueType) -> Option<Value>

Trait Implementations

impl BlockData for Value

pub fn ext() -> &'static str

pub fn max_size() -> u64

#[must_use]

fn hash<'en, 'async_trait>(
    &'en self
) -> Pin<Box<dyn Future<Output = Result<Bytes, TCError>> + 'async_trait + Send, Global>> where
    'en: 'async_trait,
    Self: ToStream<'en> + 'async_trait, 

#[must_use]

fn load<'async_trait, S>(
    source: S
) -> Pin<Box<dyn Future<Output = Result<Self, TCError>> + 'async_trait + Send, Global>> where
    Self: 'async_trait,
    S: AsyncReadExt + Send + Unpin + 'async_trait, 

#[must_use]

fn persist<'en, 'life0, 'async_trait, W>(
    &'en self,
    sink: &'life0 mut W
) -> Pin<Box<dyn Future<Output = Result<u64, TCError>> + 'async_trait + Send, Global>> where
    'en: 'async_trait,
    'life0: 'async_trait,
    Self: ToStream<'en> + 'async_trait,
    W: AsyncWrite + Send + Unpin + 'async_trait, 

#[must_use]

fn into_size<'en, 'async_trait>(
    self
) -> Pin<Box<dyn Future<Output = Result<u64, TCError>> + 'async_trait + Send, Global>> where
    'en: 'async_trait,
    Self: Clone + IntoStream<'en> + 'en + 'async_trait, 

#[must_use]

fn size<'en, 'async_trait>(
    &'en self
) -> Pin<Box<dyn Future<Output = Result<u64, TCError>> + 'async_trait + Send, Global>> where
    'en: 'async_trait,
    Self: ToStream<'en> + 'async_trait, 

impl CastFrom<IndexSchema> for Value

pub fn cast_from(schema: IndexSchema) -> Value

impl CastFrom<TableSchema> for Value

pub fn cast_from(schema: TableSchema) -> Value

impl Clone for Value

pub fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Default for Value

pub fn default() -> Value

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Value

pub fn deserialize<D>(
    deserializer: D
) -> Result<Value, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Display for Value

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

Formats the value using the given formatter.

impl From<Bytes> for Value

pub fn from(bytes: Bytes) -> Value

Performs the conversion.

impl From<Column> for Value

pub fn from(column: Column) -> Value

Performs the conversion.

impl From<Id> for Value

pub fn from(id: Id) -> Value

Performs the conversion.

impl From<Link> for Value

pub fn from(link: Link) -> Value

Performs the conversion.

impl From<Number> for Value

pub fn from(n: Number) -> Value

Performs the conversion.

impl From<Option<Value>> for Value

pub fn from(opt: Option<Value>) -> Value

Performs the conversion.

impl From<TCPathBuf> for Value

pub fn from(path: TCPathBuf) -> Value

Performs the conversion.

impl From<Tuple<Value>> for Value

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

Performs the conversion.

impl From<Value> for Scalar

fn from(value: Value) -> Self

Performs the conversion.

impl From<Value> for State

fn from(value: Value) -> Self

Performs the conversion.

impl From<Vec<Value, Global>> for Value

pub fn from(tuple: Vec<Value, Global>) -> Value

Performs the conversion.

impl From<bool> for Value

pub fn from(b: bool) -> Value

Performs the conversion.

impl From<u64> for Value

pub fn from(n: u64) -> Value

Performs the conversion.

impl From<usize> for Value

pub fn from(n: usize) -> Value

Performs the conversion.

impl<T> FromIterator<T> for Value where
    Value: From<T>, 

pub fn from_iter<I>(iter: I) -> Value where
    I: IntoIterator<Item = T>, 

Creates a value from an iterator.

impl FromStream for Value

type Context = ()

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

pub fn from_stream<'life0, 'async_trait, D>(
    _context: (),
    decoder: &'life0 mut D
) -> Pin<Box<dyn Future<Output = Result<Value, <D as Decoder>::Error>> + 'async_trait + Send, Global>> where
    'life0: 'async_trait,
    D: Decoder + 'async_trait,
    Value: 'async_trait, 

Parse this value using the given Decoder.

impl Instance for Value

type Class = ValueType

The Class type of this instance

pub fn class(&self) -> ValueType

Returns the [Class] of this instance.

impl<'en> IntoStream<'en> for Value

pub fn into_stream<E>(
    self,
    encoder: E
) -> Result<<E as Encoder<'en>>::Ok, <E as Encoder<'en>>::Error> where
    E: Encoder<'en>, 

Take ownership of this value and serialize it into the given encoder.

impl PartialEq<Value> for Value

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Serialize for Value

pub fn serialize<S>(
    &self,
    serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl<'en> ToStream<'en> for Value

pub fn to_stream<E>(
    &'en self,
    encoder: E
) -> Result<<E as Encoder<'en>>::Ok, <E as Encoder<'en>>::Error> where
    E: Encoder<'en>, 

Serialize this value into the given encoder.

impl TryCastFrom<Scalar> for Value

fn can_cast_from(scalar: &Scalar) -> bool

Test if value can be cast into Self.

fn opt_cast_from(scalar: Scalar) -> 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 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.

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<Value> for ValueType

pub fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

pub fn opt_cast_from(value: Value) -> Option<ValueType>

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<T> TryCastFrom<Value> for Map<T> where
    T: Clone + TryCastFrom<Value>, 

pub fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

pub fn opt_cast_from(value: Value) -> Option<Map<T>>

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 TryCastFrom<Value> for Link

pub fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

pub fn opt_cast_from(value: Value) -> Option<Link>

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 TryCastFrom<Value> for Number

pub fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

pub fn opt_cast_from(value: Value) -> Option<Number>

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 TryCastFrom<Value> for IdRef

fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

fn opt_cast_from(value: Value) -> 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 TryCastFrom<Value> for Subject

fn can_cast_from(value: &Value) -> bool

Test if value can be cast into Self.

fn opt_cast_from(value: Value) -> 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 TryFrom<Scalar> for Value

type Error = TCError

The type returned in the event of a conversion error.

fn try_from(scalar: Scalar) -> TCResult<Value>

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.

impl Eq for Value

impl StructuralEq for Value

impl StructuralPartialEq for Value