Struct Lang 

pub struct Lang { /* private fields */ }

A validated language tag wrapper that ensures normalization and validity.

This type wraps an oxilangtag::LanguageTag and provides a type-safe way to work with IETF BCP 47 language tags (e.g., “en”, “en-US”, “es-ES”). The language tag is validated and normalized upon construction, ensuring it conforms to the standard.

Normalization

Language tags are automatically normalized according to BCP 47 rules:

• The primary language subtag is lowercased (e.g., “EN” → “en”)
• Script subtags are title-cased (e.g., “latn” → “Latn”)
• Region subtags are uppercased (e.g., “us” → “US”)

Serialization

The #[serde(transparent)] attribute ensures that this type serializes as a plain string rather than a struct with a single field, making it compatible with JSON schemas that expect language tags as strings.

Implementations

impl Lang

pub fn new(lang: impl Into<String>) -> Result<Lang, LangParseError>

Creates a new Lang from a string-like value.

Errors

Returns LangParseError if the language tag is invalid.

pub fn as_str(&self) -> &str

Returns the language tag as a string slice.

Trait Implementations

impl Clone for Lang

fn clone(&self) -> Lang

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Lang

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Lang

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Lang

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

Formats the language tag for display.

This outputs the normalized form of the language tag, making it suitable for user-facing output, logging, and serialization to text formats.

impl Hash for Lang

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 Lang

fn cmp(&self, other: &Lang) -> 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 Lang

fn eq(&self, other: &Lang) -> 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 Lang

fn partial_cmp(&self, other: &Lang) -> 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 Lang

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Lang

impl StructuralPartialEq for Lang