[YBA] g++ newbie: No warn on missing method implementation?

[Jonathan Ben Avraham]

Hi Shachar,
Right, right.
I also think that the VS2008 is doing something "extra".

My problem is that I have a class with 70+ methods and the customer keeps 
changing the specs. I need some way to verify that all of the methods 
declared in the class have implementations. The most common mistake is 
that I change the method name in the class but forget to change the name 
in the implementation. I suppose that I could write a Perl script that 
would automatically generate method calls from the class method 
declarations and then watch for link errors.

Regards,

  - yba


On Tue, 13 Jul 2010, Shachar Shemesh wrote:

> Date: Tue, 13 Jul 2010 11:59:43 +0300
> From: Shachar Shemesh <shachar at shemesh.biz>
> To: Jonathan Ben Avraham <yba at tkos.co.il>
> Cc: ILUG <linux-il at cs.huji.ac.il>
> Subject: Re: [YBA] g++ newbie: No warn on missing method implementation?
> 
> Jonathan Ben Avraham wrote:
>       Dear linux-il list,
>       g++ seems to be quite happy to compile and link a program that has a class that
>       includes method declarations that are not implemented, as log as those methods are not
>       called explicitly in the code. VS2008 seems to be able to discover this, either at
>       compile or link time. Any way to do this in g++?
>       Thanks,
>
>        - yba
> 
> I'm not sure the VS2008 behavior is the standard. Declaring a method in a class and not defining it
> is the same "offense" as declaring a function and not defining it, both from the technical and from
> the conceptual perspective.
> 
> More to the point - I'm not aware of such a flag for g++. I'm not sure where such a flag should
> even come, as the compiler should never be the one to do it (how will it know it is not defined in
> some other compilation unit?), and the linker cannot (how does it know a function was defined if
> noone was using it?).
> 
> Shachar
> 
>

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