icucodepointtriebuilder

icu_codepointtrie_builder is a utility crate of the [ICU4X] project.

This crate exposes functionality to build a [CodePointTrie] from values provided at runtime. Because it is normally expected for CodePointTrie data to be pre-compiled, this crate is not optimized for speed; it should be used during a build phase.

Under the hood, this crate uses the CodePointTrie builder code from ICU4C, [UMutableCPTrie], shipped as a WebAssembly module and then JIT-compiled at runtime. For more context, see https://github.com/unicode-org/icu4x/issues/1837.

Examples

```rust use icucollections::codepointtrie::CodePointTrie; use icucollections::codepointtrie::TrieType; use icucodepointtriebuilder::CodePointTrieBuilder; use icucodepointtriebuilder::CodePointTrieBuilderData;

let defaultvalue = 1; let errorvalue = 2; let valuesbycode_point = &[3, 4, 5, 6];

let cpt: CodePointTrie = CodePointTrieBuilder { data: CodePointTrieBuilderData::ValuesByCodePoint(valuesbycodepoint), defaultvalue, errorvalue, trietype: TrieType::Small, } .build();

asserteq!(cpt.get(0), 3); asserteq!(cpt.get(1), 4); asserteq!(cpt.get(2), 5); asserteq!(cpt.get(3), 6); asserteq!(cpt.get(4), 1); // default value asserteq!(cpt.get(u32::MAX), 2); // error value ```

More Information

For more information on development, authorship, contributing etc. please visit ICU4X home page.