Crate pattern

Help

Expand description

icu_pattern is a utility crate of the ICU4X project.

It includes a Pattern type which supports patterns with various storage backends.

The types are tightly coupled with the writeable crate.

§Examples

Parsing and interpolating with a single-placeholder pattern:

use icu_pattern::SinglePlaceholderPattern;
use writeable::assert_writeable_eq;

// Parse a pattern string:
let pattern = SinglePlaceholderPattern::try_from_str(
    "Hello, {0}!",
    Default::default(),
)
.unwrap();

// Interpolate into the pattern string:
assert_writeable_eq!(pattern.interpolate(["World"]), "Hello, World!");

Structs§

MissingNamedPlaceholderError
MultiNamedPlaceholderKey: A string wrapper for the MultiNamedPlaceholder pattern backend.
Parser: Placeholder pattern parser.
ParserOptions: Options passed to the constructor of Parser.
Pattern: A string pattern with placeholders.
PatternString

Enums§

DoublePlaceholder: Backend for patterns containing zero, one, or two placeholders.
DoublePlaceholderKey: A two-value enum for the DoublePlaceholder pattern backend.
Error
MultiNamedPlaceholder: Backend for patterns containing zero or more named placeholders.
ParsedPatternItem: A PatternItem with additional detail returned by the Parser.
ParserError: An error returned when parsing a pattern.
PatternError
PatternItem: A borrowed item in a Pattern. Items are either string literals or placeholders.
PatternItemCow: A borrowed-or-owned item in a Pattern. Items are either string literals or placeholders.
QuoteMode: Controls how quotes (') are interpreted.
SinglePlaceholder: Backend for patterns containing zero or one placeholder.
SinglePlaceholderKey: A singleton enum for the SinglePlaceholder pattern backend.

Traits§

PatternBackend: Types that implement backing data models for Pattern implement this trait.
PlaceholderValueProvider: Trait implemented on collections that can produce TryWriteables for interpolation.

Type Aliases§