Struct AttributeValue 

pub struct AttributeValue(/* private fields */);

One validated attribute value.

A value is at most MAX_ATTRIBUTE_VALUE_BYTES UTF-8 bytes. It is otherwise free text: control characters and the empty string are legal. Empty is a stored value, not a tombstone; only an explicit remove operation deletes an attribute.

Implementations

impl AttributeValue

pub fn parse( value: impl AsRef<str>, ) -> Result<Self, AttributeValueValidationError>

Parses and validates the id from its serialized form.

pub fn as_str(&self) -> &str

Returns the serialized id.

impl AttributeValue

pub fn logical_bytes(&self) -> usize

Returns this value’s logical size in UTF-8 bytes.

The value counts its own bytes and no encoder framing.

Trait Implementations

impl AsRef<str> for AttributeValue

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<str> for AttributeValue

fn borrow(&self) -> &str

Immutably borrows from an owned value.

impl Clone for AttributeValue

fn clone(&self) -> AttributeValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AttributeValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AttributeValue

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for AttributeValue

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

Formats the value using the given formatter.

impl Eq for AttributeValue

impl FromStr for AttributeValue

type Err = AttributeValueValidationError

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for AttributeValue

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for AttributeValue

fn cmp(&self, other: &AttributeValue) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for AttributeValue

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for AttributeValue

fn partial_cmp(&self, other: &AttributeValue) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for AttributeValue

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AttributeValue

impl TryFrom<&str> for AttributeValue

type Error = AttributeValueValidationError

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<String> for AttributeValue

type Error = AttributeValueValidationError

The type returned in the event of a conversion error.

fn try_from(value: String) -> Result<Self, Self::Error>

Performs the conversion.