Struct icu::properties::PropertyParser

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pub struct PropertyParser<T> { /* private fields */ }
Expand description

A struct capable of looking up a property value from a string name. Access its data by calling Self::as_borrowed() and using the methods on PropertyParserBorrowed.

The name can be a short name (Lu), a long name(Uppercase_Letter), or an alias.

Property names can be looked up using “strict” matching (looking for a name that matches exactly), or “loose matching”, where the name is allowed to deviate in terms of ASCII casing, whitespace, underscores, and hyphens.

§Example

use icu::properties::PropertyParser;
use icu::properties::props::GeneralCategory;

let lookup = PropertyParser::<GeneralCategory>::new();
// short name for value
assert_eq!(
    lookup.get_strict("Lu"),
    Some(GeneralCategory::UppercaseLetter)
);
assert_eq!(
    lookup.get_strict("Pd"),
    Some(GeneralCategory::DashPunctuation)
);
// long name for value
assert_eq!(
    lookup.get_strict("Uppercase_Letter"),
    Some(GeneralCategory::UppercaseLetter)
);
assert_eq!(
    lookup.get_strict("Dash_Punctuation"),
    Some(GeneralCategory::DashPunctuation)
);
// name has incorrect casing
assert_eq!(lookup.get_strict("dashpunctuation"), None);
// loose matching of name
assert_eq!(
    lookup.get_loose("dash-punctuation"),
    Some(GeneralCategory::DashPunctuation)
);
// fake property
assert_eq!(lookup.get_strict("Animated_Gif"), None);

Implementations§

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impl<T> PropertyParser<T>

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pub fn new() -> PropertyParserBorrowed<'static, T>

Creates a new instance of PropertyParser<T> using compiled data.

Enabled with the compiled_data Cargo feature.

📚 Help choosing a constructor

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pub fn try_new_unstable( provider: &(impl DataProvider<<T as ParseableEnumeratedProperty>::DataMarker> + ?Sized), ) -> Result<PropertyParser<T>, DataError>

A version of Self::new that uses custom data provided by a DataProvider.

📚 Help choosing a constructor

⚠️ The bounds on provider may change over time, including in SemVer minor releases.
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pub fn as_borrowed(&self) -> PropertyParserBorrowed<'_, T>

Construct a borrowed version of this type that can be queried.

This avoids a potential small underlying cost per API call (like get_strict()) by consolidating it up front.

Trait Implementations§

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impl<T> Debug for PropertyParser<T>
where T: Debug,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<T> Freeze for PropertyParser<T>

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impl<T> RefUnwindSafe for PropertyParser<T>

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impl<T> Send for PropertyParser<T>

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impl<T> Sync for PropertyParser<T>

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impl<T> Unpin for PropertyParser<T>

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impl<T> UnwindSafe for PropertyParser<T>

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T
where T: Send + Sync,