lindera 0.7.0

# Lindera

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) [![Join the chat at https://gitter.im/lindera-morphology/lindera](https://badges.gitter.im/lindera-morphology/lindera.svg)](https://gitter.im/lindera-morphology/lindera?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)

A morphological analysis library in Rust. This project fork from fulmicoton's [kuromoji-rs](https://github.com/fulmicoton/kuromoji-rs).

Lindera aims to build a library which is easy to install and provides concise APIs for various Rust applications.

## Build

The following products are required to build:

- Rust >= 1.46.0

```text
% cargo build --release
```

## Usage

### Basic example

This example covers the basic usage of Lindera.

It will:
- Create a tokenizer in normal mode
- Tokenize the input text
- Output the tokens

```rust
use lindera::tokenizer::Tokenizer;
use lindera_core::core::viterbi::Mode;

fn main() -> std::io::Result<()> {
    // create tokenizer
    let mut tokenizer = Tokenizer::new(Mode::Normal, "");

    // tokenize the text
    let tokens = tokenizer.tokenize("関西国際空港限定トートバッグ");

    // output the tokens
    for token in tokens {
        println!("{}", token.text);
    }

    Ok(())
}
```

The above example can be run as follows:
```shell script
% cargo run --example basic_example
```

You can see the result as follows:
```text
関西国際空港
限定
トートバッグ
```

### User dictionary example

You can give user dictionary entries along with the default system dictionary. User dictionary should be a CSV with following format.

```
<surface_form>,<part_of_speech>,<reading>
```

For example:
```shell
% cat userdic.csv
東京スカイツリー,カスタム名詞,トウキョウスカイツリー
東武スカイツリーライン,カスタム名詞,トウブスカイツリーライン
とうきょうスカイツリー駅,カスタム名詞,トウキョウスカイツリーエキ
```

With an user dictionary, `Tokenizer` will be created as follows:
```rust
use lindera::tokenizer::Tokenizer;
use lindera_core::core::viterbi::Mode;

fn main() -> std::io::Result<()> {
    // create tokenizer
    let mut tokenizer = Tokenizer::new_with_userdic(Mode::Normal, "", "userdic.csv");

    // tokenize the text
    let tokens = tokenizer.tokenize("東京スカイツリーの最寄り駅はとうきょうスカイツリー駅です");

    // output the tokens
    for token in tokens {
        println!("{}", token.text);
    }

    Ok(())
}
```

The above example can be by `cargo run --example`:
```shell
% cargo run --example userdic_example
東京スカイツリー
の
最寄り駅
は
とうきょうスカイツリー駅
です
```

## API reference

The API reference is available. Please see following URL:
- <a href="https://docs.rs/lindera" target="_blank">lindera</a>