是问号运算符吗?相当于尝试！宏? [英] Is the question mark operator ? equivalent to the try! macro?

问题描述

我正在寻找一种方法来链接Rust中try!宏的用法，并发现

I am looking for a way to chain the usage of the try! macro in Rust and found this pull request that implements the ? operator.

似乎已经合并了，但是我似乎还没有找到任何文档.它等于try!宏还是有重要区别?

It seems like it has been merged, but I cannot seem to find any documentation on it yet. Is it equivalent to the try! macro or are there important differences?

推荐答案

是的，?运算符等效于try!(). ?现在处于稳定的Rust 1.13，发布于11月10日， 2016 .

Yes, the ? operator is equivalent to try!(). ? is now in stable Rust 1.13, released on November 10, 2016.

目前最好的文档来源似乎是问题).

The best source of documentation at the moment seems to be RFC 0243. Note that the catch described in the RFC is not yet implemented at this writing (issue).

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