| mod.rs |
This module provides a data structure for a space-efficient and time-efficient lookup of
sequences of 16-bit units (commonly but not necessarily UTF-16 code units)
which map to integer values.
It is an implementation of the existing [ICU4C UCharsTrie](https://unicode-org.github.io/icu-docs/apidoc/released/icu4c/classicu_1_1UCharsTrie.html)
/ [ICU4J CharsTrie](https://unicode-org.github.io/icu-docs/apidoc/released/icu4j/com/ibm/icu/util/CharsTrie.html) API.
## Architecture
ICU4X [`Char16Trie`] is designed to provide a read-only view of `UCharsTrie` data that is exported from ICU4C.
## Examples
### Querying a `Char16Trie`
```rust
use icu::collections::char16trie::{Char16Trie, TrieResult};
use zerovec::ZeroVec;
// A Char16Trie containing the ASCII characters mapping 'a' to 1 and 'ab'
// to 100.
let trie_data = [48, 97, 176, 98, 32868];
let trie = Char16Trie::new(ZeroVec::from_slice_or_alloc(&trie_data));
let mut iter = trie.iter();
let res = iter.next('a');
assert_eq!(res, TrieResult::Intermediate(1));
let res = iter.next('b');
assert_eq!(res, TrieResult::FinalValue(100));
let res = iter.next('c');
assert_eq!(res, TrieResult::NoMatch);
```
[`ICU4X`]: ../icu/index.html |
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