Rust中where子句中特征的可能运算符是什么? [英] What are the possible operators for traits in a where clause in Rust?

问题描述

我正在学习Rust，并进入了关于特征界限的章节.在该章中，他们使用+(加号)运算符给出了一个示例，以列举where子句中所有必需的特征.

I'm learning Rust and got to the chapter on trait bounds. In that chapter, they give an example with the + (plus) operator to enumerate all required traits in a where clause.

Rust中的特征还可以使用哪些其他运算符?我进行了搜索，但找不到任何与此相关的文档. Rust是否支持或"符号，方括号，否定符号?

What other operators are allowed on traits in Rust? I searched but I wasn't able to find any documentation about this. Does Rust support 'or' notation, brackets, negation?

推荐答案

或"符号

不.这样的事情对我来说毫无意义-如果可能是A或B，那么代码将如何处理?

No. Such a thing doesn't make sense to me — what would the code do if something could be A OR B?

括号

否，除非您在Fn(...)和朋友中加上括号，否则不要将尖括号用作泛型(Vec<T>)或将方括号用作切片([u8])，但这是类型的一部分.

No, unless you count the parenthesis in Fn(...) and friends, the use of angle brackets as generics (Vec<T>) or the use of square brackets in slices ([u8]), but these are parts of types.

同样，这样的请求对我来说毫无意义，为什么您需要任何分组?

Again, such a request doesn't make sense to me, why would you need any kind of grouping?

否定

不.我认为这是由于处理否定逻辑会使事情变得更加复杂.

No. I believe this is due to the fact that handling negative logic makes things a lot more complicated.

其他运算符

other operators

已绑定?(问号).

来源:我已经编写了 Rust代码解析器.虽然可能我错过了一些东西，但它可以解析我抛出的所有〜37500 Rust文件，因此非常合适.

Source: I've written a parser of Rust code. While it's possible I've missed something, it parses all the ~37500 Rust files I've thrown at it, so it's a pretty good fit.

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