Struct zng_ext_l10n::Lang

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pub struct Lang(pub LanguageIdentifier);
Expand description

Identifies the language, region and script of text.

Use the lang! macro to construct one, it does compile-time validation.

Use the unic_langid crate for more advanced operations such as runtime parsing and editing identifiers, this type is just an alias for the core struct of that crate.

Tuple Fields§

§0: LanguageIdentifier

Implementations§

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impl Lang

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pub fn direction(&self) -> LayoutDirection

Returns character direction of the language.

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pub fn matches( &self, other: &Self, self_as_range: bool, other_as_range: bool, ) -> bool

Compares a language to another allowing for either side to use the missing fields as wildcards.

This allows for matching between en (treated as en-*-*-*) and en-US.

Methods from Deref<Target = LanguageIdentifier>§

pub fn matches<O>( &self, other: &O, self_as_range: bool, other_as_range: bool, ) -> bool
where O: AsRef<LanguageIdentifier>,

Compares a LanguageIdentifier to another AsRef<LanguageIdentifier allowing for either side to use the missing fields as wildcards.

This allows for matching between en (treated as en-*-*-*) and en-US.

§Examples
use unic_langid_impl::LanguageIdentifier;

let li1: LanguageIdentifier = "en".parse()
    .expect("Parsing failed.");

let li2: LanguageIdentifier = "en-US".parse()
    .expect("Parsing failed.");

assert_ne!(li1, li2); // "en" != "en-US"
assert_ne!(li1.to_string(), li2.to_string()); // "en" != "en-US"

assert_eq!(li1.matches(&li2, false, false), false); // "en" != "en-US"
assert_eq!(li1.matches(&li2, true, false), true); // "en-*-*-*" == "en-US"
assert_eq!(li1.matches(&li2, false, true), false); // "en" != "en-*-US-*"
assert_eq!(li1.matches(&li2, true, true), true); // "en-*-*-*" == "en-*-US-*"

pub fn variants(&self) -> impl ExactSizeIterator

Returns a vector of variants subtags of the LanguageIdentifier.

§Examples
use unic_langid_impl::LanguageIdentifier;

let li1: LanguageIdentifier = "ca-ES-valencia".parse()
    .expect("Parsing failed.");

assert_eq!(li1.variants().map(|v| v.as_str()).collect::<Vec<_>>(), &["valencia"]);

let li2: LanguageIdentifier = "de".parse()
    .expect("Parsing failed.");

assert_eq!(li2.variants().len(), 0);

pub fn has_variant(&self, variant: Variant) -> bool

Tests if a variant subtag is present in the LanguageIdentifier.

§Examples
use unic_langid_impl::LanguageIdentifier;

let mut li: LanguageIdentifier = "ca-ES-macos".parse()
    .expect("Parsing failed.");

assert_eq!(li.has_variant("valencia".parse().unwrap()), false);
assert_eq!(li.has_variant("macos".parse().unwrap()), true);

pub fn character_direction(&self) -> CharacterDirection

Returns character direction of the LanguageIdentifier.

§Examples
use unic_langid_impl::{LanguageIdentifier, CharacterDirection};

let li1: LanguageIdentifier = "es-AR".parse()
    .expect("Parsing failed.");
let li2: LanguageIdentifier = "fa".parse()
    .expect("Parsing failed.");

assert_eq!(li1.character_direction(), CharacterDirection::LTR);
assert_eq!(li2.character_direction(), CharacterDirection::RTL);

Trait Implementations§

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impl Clone for Lang

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fn clone(&self) -> Lang

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Lang

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

Formats the value using the given formatter. Read more
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impl Default for Lang

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fn default() -> Lang

Returns the “default value” for a type. Read more
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impl Deref for Lang

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type Target = LanguageIdentifier

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'de> Deserialize<'de> for Lang

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Display for Lang

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

Formats the value using the given formatter. Read more
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impl From<Lang> for Langs

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fn from(lang: Lang) -> Self

Converts to this type from the input type.
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impl FromStr for Lang

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type Err = LanguageIdentifierError

The associated error which can be returned from parsing.
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fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for Lang

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl IntoVar<Langs> for Lang

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type Var = LocalVar<Langs>

Variable type that will wrap the T value. Read more
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fn into_var(self) -> Self::Var

Converts the source value into a var.
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fn into_boxed_var(self) -> Box<dyn VarBoxed<T>>
where Self: Sized,

Converts into BoxedVar<T>. Read more
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impl Ord for Lang

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Lang

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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

Serialize this value into the given Serde serializer. Read more
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impl Eq for Lang

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impl IntoValue<Langs> for Lang

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impl StructuralPartialEq for Lang

Auto Trait Implementations§

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impl Freeze for Lang

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impl RefUnwindSafe for Lang

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impl Send for Lang

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impl Sync for Lang

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impl Unpin for Lang

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impl UnwindSafe for Lang

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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Access to mut dyn Any methods.
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Clone the value.
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Clone the value into a new boxed LocalVar<Self>.
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Access to Box<dyn Any> methods.
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Gets if self equals other.
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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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