什么是＆QUOT;接口＆QUOT;关键字MSVC？ [英] What is the "interface" keyword in MSVC?

问题描述

我期待通过Windows 8.1 SDK，并在UnknownBase.h我看到像

I'm looking through the Windows 8.1 SDK and in UnknownBase.h I'm seeing things like

typedef interface IUnknown IUnknown;

我以前从未见过这种接口关键字。请注意，这无疑是一种 .H 头，通过 cl.exe时处理。这不是IDL文件，它不是由 MIDL.EXE 处理。

I've never seen this interface keyword before. Note that this is very definitely a .h header, processed by cl.exe. It's not IDL file, and it's not processed by midl.exe.

我发现这个在线：<一href=\"http://msdn.microsoft.com/en-us/library/50h7kwtb.aspx\">http://msdn.microsoft.com/en-us/library/50h7kwtb.aspx

但 __接口是不一样的接口

任何人都可以线索，我会在这里？

Can anyone clue me in here?

推荐答案

微软有一些具体的编译器的扩展，如一个你联系，但接口不应该是原生C ++编译器特定的关键字，而是一个定义哪些替代的东西（在BaseTyps.h它曾经被定义如下）

Microsoft has some compiler-specific extensions like the one you linked but interface shouldn't be a native C++ compiler-specific keyword but rather a define which substitutes something (in BaseTyps.h it used to be defined as follows)

# define interface  struct

<一个href=\"http://www.math.uiuc.edu/~gfrancis/illimath/windows/aszgard_mini/bin/MinGW/include/basetyps.h\">Link这里

如果你想验证这一点做一个的grep 这样的定义，你应该找到类似的东西。

If you want to verify this do a grep for such a definition and you should find something similar.

参考文献：<一href=\"http://social.msdn.microsoft.com/forums/vstudio/en-US/06bf1dea-1d20-4ec3-b9a1-3d673d7fcd8d/what-is-the-interface-keyword-in-native-c\">http://social.msdn.microsoft.com/forums/vstudio/en-US/06bf1dea-1d20-4ec3-b9a1-3d673d7fcd8d/what-is-the-interface-keyword-in-native-c

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