[CLN-list] modular polynomials

[Alexei Sheplyakov]

Hi,

On Sat, Sep 27, 2008 at 09:24:06PM +0200, Bruno Haible wrote:

> The copy-constructor and the assignment operator should always do the same
> thing in C++.

AFAIR the standard does not require this.

> People won't understand if
> 
>      cl_UP a = ...;
>      cl_UP b = a;
> 
> and
> 
>      cl_UP a = ...;
>      cl_UP b;
>      b = a;
> 
> behave differently.

Yes, this is a bit unexpected, especially if it is not documented properly.
Current behaviour is even more confusing, though.

> And in CLN these simple assignments are only copying a simple reference,
> not the deep contents (see the other mail).

In C++ "deep copying" is typically called operator=. Calling some other
operation `operator=' is a bit surprising, although there might be valid
reasons to do so. But sometimes it's just plain inappropriate (case in
point: cl_UP).

Best regards,
	Alexei

-- 
All science is either physics or stamp collecting.

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