Struct Tag 

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

An opaque, unique tag identifying a value’s Metadata and profile.

A Tag is retrieved either via Tagged or Value::tag(). The corresponding metadata can be retrieved via Figment::get_metadata() and the profile vile Tag::profile().

Implementations

impl Tag

pub const Default: Tag

The default Tag. Such a tag will never have associated metadata and is associated with a profile of Default.

pub const fn is_default(self) -> bool

Returns true if self is Tag::Default.

Example

use figment::value::Tag;

assert!(Tag::Default.is_default());

pub fn profile(self) -> Option<Profile>

Returns the profile self refers to if it is either Profile::Default or Profile::Custom; otherwise returns None.

Example

use figment::Profile;
use figment::value::Tag;

assert_eq!(Tag::Default.profile(), Some(Profile::Default));

Trait Implementations

impl Clone for Tag

fn clone(&self) -> Tag

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tag

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

Formats the value using the given formatter.

impl Default for Tag

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Tag

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Tag> for Value

fn from(tag: Tag) -> Self

Converts to this type from the input type.

impl Hash for Tag

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 Tag

fn cmp(&self, other: &Self) -> 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 Tag

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Tag

fn partial_cmp(&self, other: &Self) -> 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 Tag

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

Serialize this value into the given Serde serializer.

impl Copy for Tag

impl Eq for Tag

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes