D3 is potentially damaging

[H. S. Teoh]

On Thu, May 03, 2012 at 10:22:16AM +0200, James Miller wrote:
[...]
> D3 would be fine, iff it was easy to port D2 across and easy to
> continue using D2 code. A big problem with Python2 -> Python3 is the
> fact that it is a nightmare to have both running side-by-side.
> 
> I don't really think that D3 is a good idea, it would probably be
> better to gradually deprecate code going forward and replace the
> broken syntax and non backwards-compatible code.
> 
> Another useful could be to have a pragma(version, 2) so the compiler
> compiles with version 2 rules, no porting needed, just a single line
> near the top.
[...]

+1 to the pragma. If there ever will be a D3, this will be indispensible
to not lose the majority of existing users.

OTOH, it will make the compiler much harder to maintain.


T

-- 
Once bitten, twice cry...