将英语、荷兰语、西班牙语、德语、意大利语或法语书写的数字转换为它们的数字表示形式。

此包提供库以识别、解析和将自然语言中表达的数量（十进制）转录为数字。

示例

检查某些字符串是否为给定语言的合法数字

use text2num::{Language, text2digits};

let es = Language::spanish();
let utterance = "ochenta y cinco";

match text2digits(utterance, &es) {
    Ok(repr) => println!("'{}' means {} in Spanish", utterance, repr),
    Err(_) => println!("'{}' is not a number in Spanish", utterance)
}

当运行上述代码时，应打印 'ochenta y cinco' 在西班牙语中表示 85 in Spanish 到标准输出。

在自然语言字符串中查找和替换数字

通常，你只是想重写包含自然语言的字符串，使其包含的数字（基数词、序数词、小数）以数字（十进制）形式出现。

由于孤立的较小数字在纯文本中可能更容易阅读，你可以指定一个阈值，在此阈值以下，孤立的简单基数词和序数词不会被替换。

use text2num::{Language, replace_numbers};

let en = Language::english();

let sentence = "Let me show you two things: first, isolated numbers are treated differently than groups like one, two, three. And then, that decimal numbers like three point one four one five are well understood.";

assert_eq!(
    replace_numbers(sentence, &en, 10.0),
    "Let me show you two things: first, isolated numbers are treated differently than groups like 1, 2, 3. And then, that decimal numbers like 3.1415 are well understood."
);

assert_eq!(
    replace_numbers(sentence, &en, 0.0),
    "Let me show you 2 things: 1st, isolated numbers are treated differently than groups like 1, 2, 3. And then, that decimal numbers like 3.1415 are well understood."
);

有关更高级的使用（例如，在标记流中），请参阅 文档。