idl中定义的struct中的构造函数导致MIDL2025 [英] constructor in struct defined in idl leads to MIDL2025

问题描述

我一直遇到令人讨厌的编译器错误，告诉我我做的事情很不对劲.
我得到的错误是:错误MIDL2025:语法错误:期望"tagDevice"附近的类型规范.在IDL中定义了以下结构，该结构肯定与之相关，因为从常规.h/.cpp文件进行相同的编译(和工作)不会出现任何问题.

Hi, I keep running into a nasty compiler error telling me that I am doing something seriously wrong.
The error I get is: error MIDL2025 : syntax error : expecting a type specification near "tagDevice". The following struct is defined in the IDL which definitely has something to do with it as the same compiles (and works) without any problem from a regular .h / .cpp file.

typedef struct tagDevice
{
    tagDevice()
    {
        DeviceName = NULL;
        DeviceId  = -1;
    }

    BSTR    DeviceName;
    int     DeviceId;
}Device;

删除构造函数，然后全部编译就可以了，但是我不想每次都手动初始化值.

Remove the constructor and it all compiles OK but I don''t want to have to initialize the values manually each and every time.

Anybody got an idea of how I can get this to work?

推荐答案

总的来说，最好不要在结构上构造任何构造函数并对其进行处理，这是一个好主意.就像普通的旧数据一样.我确实相信COM希望使用不支持构造函数的C样式结构，以便可以解释您所看到的错误.

It''s generally a good idea not to have a constructor on a structure anyway and treat it like plain old data. I do believe COM expects C-style structs which do not support constructors, so that may explain the error you''re seeing.

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