Module icu::collections::codepointinvlist

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Expand description

This module provides necessary functionality for highly efficient querying of sets of Unicode characters.

It is an implementation of the code point portion of the existing ICU4C UnicodeSet API.

Architecture

ICU4X CodePointInversionList is split up into independent levels, with CodePointInversionList representing the membership/query API, and CodePointInversionListBuilder representing the builder API.

Examples:

Creating a CodePointInversionList

CodePointSets are created from either serialized CodePointSets, represented by inversion lists, the CodePointInversionListBuilder, or from the Properties API.

use icu_collections::codepointinvlist::{
    CodePointInversionList, CodePointInversionListBuilder,
};

let mut builder = CodePointInversionListBuilder::new();
builder.add_range(&('A'..='Z'));
let set: CodePointInversionList = builder.build();

assert!(set.contains('A'));

Querying a CodePointInversionList

Currently, you can check if a character/range of characters exists in the CodePointInversionList, or iterate through the characters.

use icu_collections::codepointinvlist::{
    CodePointInversionList, CodePointInversionListBuilder,
};

let mut builder = CodePointInversionListBuilder::new();
builder.add_range(&('A'..='Z'));
let set: CodePointInversionList = builder.build();

assert!(set.contains('A'));
assert!(set.contains_range(&('A'..='C')));
assert_eq!(set.iter_chars().next(), Some('A'));

Structs

Enums