元组结构体

如果字段名称不重要,您可以使用元组结构体:

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这通常用于单字段封装容器(称为 newtype):

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Speaker Notes

This slide should take about 10 minutes.
  • 如需对基元类型中的值的额外信息进行编码,使用 newtype 是一种非常好的方式,例如:
    • 数字会以某些单位来衡量:上方示例中为 Newtons
    • The value passed some validation when it was created, so you no longer have to validate it again at every use: PhoneNumber(String) or OddNumber(u32).
  • 展示如何通过访问 newtype 中的单个字段,将 f64 值添加到 Newtons 类型。
    • Rust 通常不喜欢不明确的内容,例如自动解封或将布尔值用作整数。
    • 运算符过载在第 3 天(泛型)讨论。
  • 此示例巧妙地引用了火星气候探测者号 的失败事故。