Question

I have an interface declared in its own header MyInterface.h:

class MyInterface{
public:
    virtual ~MyInterface(){}
    virtual void initialize() = 0;
    virtual void newValueSound(int stream, double value) = 0;
    virtual void newValueAlg1(int stream, double value) = 0;
    virtual void newValueAlg2(int stream, double value) = 0;
};

Whenever I include this header and try to use the interface, for example:

#include "MyInterface.h"

void someMethod(){
    MyInterface *interface;
}

I get strange compile errors on the line:

error C2332: ‘struct’ : missing tag name
error C2011: ‘<unnamed-tag>’ : ‘enum’ type redefinition
error C2226: syntax error : unexpected type ‘<unnamed-tag>’

What is wrong with my code?

EDIT:
Header has include guards.
I use Eclipse CDT with Microsoft compiler.

The whole header:

#ifndef MYINTERFACE_H_
#define MYINTERFACE_H_

class MyInterface{
public:
    virtual ~MyInterface(){}
    virtual void initialize() = 0;
    virtual void newValueSound(int stream, double value) = 0;
    virtual void newValueAlg1(int stream, double value) = 0;
    virtual void newValueAlg2(int stream, double value) = 0;
};

#endif

and the class it is used in:

#ifndef MAIN_H_
#define MAIN_H_

#include <asio.h>
#include "Stream.h"
#include "MyInterface.h"

class MicApp {
private:
    long inputChannelCount;
    Stream **streams;
    MyInterface *interface;
public:
    MicApp(MyInterface *interface);
    void initializeASIODrivers();
    char **getDriverNames(int *numberOfDrivers);
    bool loadDriver(char *driverName);
    ASIOError initDriver(ASIODriverInfo *asioDriverInfo);
    long getChannelCount();
    double getSampleRate();
    void activateStream(bool activate, int stream);
    ASIOError startASIO();
    ASIOError stopASIO();
    ASIOError exitDriver();
};

#endif

Note that “Stream” is another class and it is used without any problems.

Answer 1

The thing was that the string “interface” is typedef’ed in ObjBase.h. So I cannot use “interface” as identifier. If I use another string as identifier, it works ok