问题:

Is there some tool (hopefully emacs) that can update and add the correct function definitions and other things to keep the source (.cpp) and the header (.h) files synchronized.

For example if I start doing this:

file: aaa.h

Class AAA {
   int b;
public:
   void func();
};

something that will automatically create and add:

file: aaa.cpp

void AAA:func() {

}

And any changes will appear on both?

Am I just dreaming too much?

回答1:

An almost duplicate question was asked here and my answer describes the tool that we use to go from a single file to separate header and source files: lzz.

I don't know of any tool that can do the reverse translation.

回答2:

Visual Studio + Visual Assist X does it (see Refactoring features).

But indeed, it's not emacs based :/

回答3:

Xrefactory (fairly expensive tool) might be able to do what you are looking for. I haven't used it (I use Visual Studio + Visual Assist myself) but it shows up on a google search for 'emacs refactoring tools'.