🚀 go-pugleaf

What is this error, which appears only when using the -Woverloaded-virtual  
flag, telling me about my virtual functions?  In each derived class, the  
virtual function sampleRate() is declared as returning an int, and accepting no  
arguments. LPCHeader, FFTHeader, and EnvelopeHeader are all derived from  
Header.  The Header class itself contains no member function sampleRate; it is  
virtual in the three derived classes to allow further derivations of those  
classes.

Header.h:154: conflicting specification deriving virtual function `int   
LPCHeader::sampleRate ()'
Header.h:198: conflicting specification deriving virtual function `int   
FFTHeader::sampleRate ()'
Header.h:234: conflicting specification deriving virtual function `int   
EnvelopeHeader::sampleRate ()'

Here is a portion of the header file:

class Header : public Resource {
protected:
	int magic_number;
	int data_offset;
	int data_size;
	DataType data_type;
	int nchans;
	char *comment;
public:
..
};

class LPCHeader : public Header {
protected:
	int npoles;
	double framerate;
	int samprate;
	double dur;
public:
..
	virtual int sampleRate() { return samprate; }
..
};

class FFTHeader : public Header {
protected:
	int mode;
	int samprate;
	int npoints;
public:
..
	virtual int sampleRate() { return samprate; }
..
};

I know that I could extract out an intermediate abstract class containing the  
common data and interface, but for the small amount of overlap, I dodnt bother.

Thanks in advance.

--
Douglas Scott                              (805)893-8352
Center for Computer Music Research and Composition
University of California, Santa Barbara
Internet: (NeXTMail ok)   <doug@foxtrot.ccmrc.ucsb.edu>