Enum stam::DataValue

pub enum DataValue {
    Null,
    String(String),
    Bool(bool),
    Int(isize),
    Float(f64),
    List(Vec<DataValue>),
    Datetime(DateTime<FixedOffset>),
}

This type encapsulates a value and its type. It is held by AnnotationData alongside a reference to a DataKey, resulting in a key/value pair.

Variants

Null

No value

String(String)

A string value

Bool(bool)

A boolean value

Int(isize)

A numeric integer value

Float(f64)

A numeric floating-point value

List(Vec<DataValue>)

Value is an unordered set The value is an ordered list

Datetime(DateTime<FixedOffset>)

The value is a date/timestamp

Implementations

impl<'a> DataValue

pub fn test(&self, operator: &DataOperator<'a>) -> bool

This applies a DataOperator to the data value, and returns a boolean if the values passes the constraints posed by the operator. Note that the DataOperator itself holds the value that is tested against.

pub fn to_json(&self) -> Result<String, StamError>

Writes a datavalue to one STAM JSON string, with appropriate formatting

pub fn to_json_compact(&self) -> Result<String, StamError>

Writes a datavalue to one STAM JSON string, without any indentation

Trait Implementations

impl Clone for DataValue

fn clone(&self) -> DataValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl DataSize for DataValue

const IS_DYNAMIC: bool = true

If true, the type has a heap size that can vary at runtime, depending on the actual value.

const STATIC_HEAP_SIZE: usize = 8usize

The amount of space a value of the type always occupies. If IS_DYNAMIC is false, this is the total amount of heap memory occupied by the value. Otherwise this is a lower bound.

fn estimate_heap_size(&self) -> usize

Estimates the size of heap memory taken up by this value.

impl Debug for DataValue

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

Formats the value using the given formatter.

impl<'bytes, Ctx> Decode<'bytes, Ctx> for DataValue

fn decode( __d777: &mut Decoder<'bytes>, __ctx777: &mut Ctx ) -> Result<DataValue, Error>

Decode a value using the given Decoder.

fn nil() -> Option<Self>

If possible, return a nil value of Self.

impl<'de> Deserialize<'de> for DataValue

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DataValue

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

Formats the value using the given formatter.

impl<Ctx> Encode<Ctx> for DataValue

fn encode<__W777>( &self, __e777: &mut Encoder<__W777>, __ctx777: &mut Ctx ) -> Result<(), Error<__W777::Error>>

where __W777: Write,

Encode a value of this type using the given Encoder.

fn is_nil(&self) -> bool

Is this value of Self a nil value?

impl<'a> From<&'a DataValue> for DataOperator<'a>

fn from(v: &'a DataValue) -> Self

Converts to this type from the input type.

impl From<&str> for DataValue

fn from(item: &str) -> Self

Converts to this type from the input type.

impl From<DateTime<FixedOffset>> for DataValue

fn from(item: DateTime<FixedOffset>) -> Self

Converts to this type from the input type.

impl From<String> for DataValue

fn from(item: String) -> Self

Converts to this type from the input type.

impl From<Vec<DataValue>> for DataValue

fn from(item: Vec<DataValue>) -> Self

Converts to this type from the input type.

impl From<bool> for DataValue

fn from(item: bool) -> Self

Converts to this type from the input type.

impl From<f32> for DataValue

fn from(item: f32) -> Self

Converts to this type from the input type.

impl From<f64> for DataValue

fn from(item: f64) -> Self

Converts to this type from the input type.

impl From<i16> for DataValue

fn from(item: i16) -> Self

Converts to this type from the input type.

impl From<i32> for DataValue

fn from(item: i32) -> Self

Converts to this type from the input type.

impl From<i64> for DataValue

fn from(item: i64) -> Self

Converts to this type from the input type.

impl From<i8> for DataValue

fn from(item: i8) -> Self

Converts to this type from the input type.

impl From<isize> for DataValue

fn from(item: isize) -> Self

Converts to this type from the input type.

impl From<u16> for DataValue

fn from(item: u16) -> Self

Converts to this type from the input type.

impl From<u32> for DataValue

fn from(item: u32) -> Self

Converts to this type from the input type.

impl From<u64> for DataValue

fn from(item: u64) -> Self

Converts to this type from the input type.

impl From<u8> for DataValue

fn from(item: u8) -> Self

Converts to this type from the input type.

impl From<usize> for DataValue

fn from(item: usize) -> Self

Converts to this type from the input type.

impl PartialEq<&str> for DataValue

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

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

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

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

impl PartialEq<DataValue> for &str

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

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

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

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

impl PartialEq<DataValue> for DateTime<FixedOffset>

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

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

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

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

impl PartialEq<DataValue> for f64

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

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

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

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

impl PartialEq<DataValue> for isize

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

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

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

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

impl PartialEq<DataValue> for str

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

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

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

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

impl PartialEq<f64> for DataValue

fn eq(&self, other: &f64) -> bool

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

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

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

impl PartialEq<isize> for DataValue

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

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

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

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

impl PartialEq<str> for DataValue

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

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

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

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

impl PartialEq for DataValue

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

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

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

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

impl Serialize for DataValue

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> TryFrom<DataOperator<'a>> for DataValue

type Error = StamError

The type returned in the event of a conversion error.

fn try_from(operator: DataOperator<'a>) -> Result<Self, Self::Error>

Performs the conversion.

impl TypeInfo for DataValue

fn typeinfo() -> Type

Return the type (introspection).

fn temp_id_prefix() -> &'static str

Return the prefix for temporary identifiers of this type

impl StructuralPartialEq for DataValue