如何在文档中找到可用于 &str 的 to_string? [英] How to find in documentation that to_string is available for &str?

问题描述

我试图了解 阅读一行，但我在str，即使我知道它在那里.

I was trying to understand what's going on when reading a line, but I couldn't find that there is a method to_string in the documentation for str, even though I know it's there.

推荐答案

&str 和 ToString::to_string 在文档中，因为 ToString 有一个 blanket 实现:

impl<T> ToString for T where T: Display, T: ?Sized

这意味着 ToString 是为任何实现 显示.&str 确实实现了 Display.

This means that ToString is implemented for any item that implements Display. &str does implement Display.

(移自评论).

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