使用clang将std lib导入为模块 [英] Import std lib as modules with clang

问题描述

我正在用clang进行模块的实验，并且希望将标准库作为模块而不是包含在模块中.

I am experimenting with modules in clang, and would like to include the standard lib as modules instead of as includes.

目前我正在这样做

#include <iostream>
#include <string>

似乎您在msvc中应该能够导入标准库，例如

It seems that you in msvc should be able to import standard libs with for example

import std.core;

但是在使用clang时，这似乎没有实现或以其他方式实现.

When using clang however this does not seem to be implemented, or implemented in another way.

我的问题是:是否可以像微软的建议那样导入stl-includes，或者是否可以将标准的lib include映射到somhow模块.

My question is: Is it possible to import stl-includes like microsoft suggest, or is it possible to map standard lib includes to modules somhow.

注意:之所以不能使用 #include< ...> 或 #import< ...> ，是因为可能存在其他错误提出自己的问题.因此，我认为，如果可能的话，现在要获取 import std.core 或类似的方法.

Note: The reason I cannot use #include <...> or #import <...> is because of other errors that might get its own question. So I think that getting import std.core or similar is the way to go now if it is possible.

ModernesCpp 也提到了std.core.

ModernesCpp also mentions std.core.

推荐答案

C ++ 20标准不包括C ++标准库的模块定义.Visual Studio确实做到了(不幸的是)，并且许多不良站点的行为都像是标准行为.但事实并非如此；这只是微软的事情.

The C++20 standard does not include module definitions for the C++ standard library. Visual Studio does (unfortunately), and a lot of bad sites out there will act like this is standard. But it's not; it's just a Microsoft thing.

如果要通过跨平台的模块包含C ++标准库，则必须使用 import< header-name> 语法或编写自己的导入标头的标准库模块并导出特定的C ++声明.

If you want to include the C++ standard library through a module across platforms, you will have to either use import <header-name> syntax or write your own standard library modules that import the headers and export specific C++ declarations.

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