什么是运算符“"?在C ++中? [英] What is the operator "" in C++?

问题描述

我跌倒了此页面，作者在其中谈论了运算符" :

I fell on this page where the author talks about the standardisation of the operator "":

C ++标准委员会关于标准化operator "" 的决定 是[...]

The decision of the C++ standards committee to standardise operator "" was [...]

他/她在说什么?我找不到关于此的任何信息，我也不了解它的含义(常量字符串的重载?还是更具概念性的东西，不影响该语言的最终使用?)

What is he/she talking about? I can't find any information about this, and I don't understand what it could imply (overload for constant strings? Or something more conceptual, that doesn't affect the final use of the language?)

推荐答案

这些是用户-定义的文字.它们使您可以就地创建std::string，std::chrono::durations之类的东西或任何用户定义的类型(您可以创建自己的文字):

Those are user-defined literals. They allow you to create stuff like std::string, std::chrono::durations or any user defined type (you can make your own literals) in place:

auto str = "Hello"s; // str is std::string("Hello")
auto sec = 5s;       // sec is 5 std::chrono::seconds

在我链接的文档页面的底部，可以找到标准库提供的文字运算符及其文档的列表.

A list of the literal-operators provided by the standard library and their documentation can be found at the bottom of the documentation page I linked.

这篇关于什么是运算符“"?在C ++中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！