问题描述
我想做一个简单的Objective-C ++应用程序。我的所有代码编译良好，包括在Objective-C类中使用C ++，直到我尝试并添加一个C ++类到混合。我创建了一个简单的C ++类：
I'm trying to make a simple Objective-C++ applicaiton. All of my code is compiling fine, including the use of C++ in Objective-C classes, until I try and add a C++ class to the mix. I've created a simple C++ class:
Test.h
class Test {
};
并将此文件包含在Objective-C类中（扩展名为.mm）以下构建错误：
and included this file in a Objective-C class (with a .mm extension) and I get the following build error:
error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Test'
显然，我在这里缺少一些简单的概念。我会感谢一些启发。
Clearly I'm missing some simple concept here. I'd appreciate some enlightment.
推荐答案
helixed的答案将无济于事，如果__cplusplus未定义，你的类将被预处理器忽略。
helixed's answer will not help, your class will be just skiped by preprocessor if __cplusplus undefined.
最重要的是你试图从* .m文件中包含C ++类，请尝试将其重命名为* .mm。
这解决了同样的问题在我身边。
Most of all you trying to include C++ class from *.m file, try to rename it to *.mm.This solve the same problem on my side.
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