Struct LanguageTag

pub struct LanguageTag<T: Borrow<str>>(/* private fields */);

This wrapper guarantees that the underlying str is a valid BCP47 language tag.

NB: it is actually more permissive than BCP47.

A LanguageTag can be combined to a &str with the * operator, to produce an RDF language tagged string implementing the Term trait:

let fr = LanguageTag::new_unchecked("fr");
let message = "Bonjour le monde" * fr;
assert!(message.is_literal());
assert_eq!(message.lexical_form().unwrap(), "Bonjour le monde");
assert_eq!(message.datatype().unwrap(), rdf::langString.iri().unwrap());
assert_eq!(message.language_tag().unwrap(), fr);

Implementations

impl<T: Borrow<str>> LanguageTag<T>

pub fn new(tag: T) -> Result<Self, InvalidLanguageTag>

Build a new LanguageTag from tag, returning an error if it is not a valid BCP47 language tag.

pub fn new_unchecked(tag: T) -> Self

Build a new LanguageTag from tag. It does not check that the value returned by the function is valid. If it is not, it may result in undefined behaviour.

pub fn unwrap(self) -> T

Returns the wrapped value, consuming self.

pub fn as_str(&self) -> &str

Gets a reference to the underlying str.

pub fn as_ref(&self) -> LanguageTag<&str>

Convert reference to a LanguageTag<&str>

pub fn map_unchecked<F, U>(self, f: F) -> LanguageTag<U>

where F: FnOnce(T) -> U, U: Borrow<str>,

Map a LanguageTag<T> to a LanguageTag<U> by applying a function to the wrapped value.

It does not check that the value returned by the function is valid. If it is not, it may result in undefined behaviour.

impl LanguageTag<&'static str>

pub const fn new_unchecked_const(inner: &'static str) -> Self

Construct a LanguageTag<&'static> without checking that the inner value is valid. If it is not, it may result in undefined behaviour.

Trait Implementations

impl<T: Borrow<str>> AsRef<T> for LanguageTag<T>

fn as_ref(&self) -> &T

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

impl<T: Borrow<str>> AsRef<str> for LanguageTag<T>

fn as_ref(&self) -> &str

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

impl<T: Borrow<str>> Borrow<T> for LanguageTag<T>

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl<T: Borrow<str>> Borrow<str> for LanguageTag<T>

fn borrow(&self) -> &str

Immutably borrows from an owned value.

impl<T: Clone + Borrow<str>> Clone for LanguageTag<T>

fn clone(&self) -> LanguageTag<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Borrow<str>> Debug for LanguageTag<T>

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

Formats the value using the given formatter.

impl<T: Borrow<str>> Hash for LanguageTag<T>

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<'a> Mul<LanguageTag<&'a str>> for &'a str

type Output = SimpleTerm<'a>

The resulting type after applying the * operator.

fn mul(self, rhs: LanguageTag<&'a str>) -> Self::Output

Performs the * operation.

impl<T: Borrow<str>> Mul<LanguageTag<T>> for Any

type Output = LanguageTagMatcher<T>

The resulting type after applying the * operator.

fn mul(self, rhs: LanguageTag<T>) -> Self::Output

Performs the * operation.

impl<T: Borrow<str>> Ord for LanguageTag<T>

fn cmp(&self, other: &LanguageTag<T>) -> 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<T: Borrow<str>, U: Borrow<str>> PartialEq<LanguageTag<T>> for LanguageTag<U>

fn eq(&self, other: &LanguageTag<T>) -> 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<T: Borrow<str>> PartialEq<str> for LanguageTag<T>

fn eq(&self, other: &str) -> 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<T: Borrow<str>> PartialOrd<str> for LanguageTag<T>

fn partial_cmp(&self, other: &str) -> 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<T: Borrow<str>> PartialOrd for LanguageTag<T>

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<T: Borrow<str>> Deref for LanguageTag<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T: Copy + Borrow<str>> Copy for LanguageTag<T>

impl<T: Borrow<str>> Eq for LanguageTag<T>