Trait icu::pattern::PatternBackend

pub trait PatternBackend:
    Sealed
    + 'static
    + Debug {
    type PlaceholderKey<'a>;
    type PlaceholderKeyCow<'a>;
    type Error<'a>;
}

Types that implement backing data models for Pattern implement this trait.

The trait has no public methods and is not implementable outside of this crate.

Required Associated Types

type PlaceholderKey<'a>

The type to be used as the placeholder key in code.

type PlaceholderKeyCow<'a>

Cowable version of the type to be used as the placeholder key in code.

type Error<'a>

The type of error that the TryWriteable for this backend can return.

Object Safety

This trait is not object safe.

Implementors

impl PatternBackend for DoublePlaceholder

type PlaceholderKey<'a> = DoublePlaceholderKey

type PlaceholderKeyCow<'a> = DoublePlaceholderKey

type Error<'a> = Infallible

impl PatternBackend for MultiNamedPlaceholder

type PlaceholderKey<'a> = MultiNamedPlaceholderKey<'a>

type PlaceholderKeyCow<'a> = MultiNamedPlaceholderKeyCow<'a>

type Error<'a> = MissingNamedPlaceholderError<'a>

impl PatternBackend for SinglePlaceholder

type PlaceholderKey<'a> = SinglePlaceholderKey

type PlaceholderKeyCow<'a> = SinglePlaceholderKey

type Error<'a> = Infallible