Tuple assignment

[Andrei Alexandrescu]

On 10/7/10 3:55 CDT, Pelle wrote:
> On 10/07/2010 08:08 AM, Walter Bright wrote:
>> If expr represents a tuple, we (Andrei and I) were thinking about the
>> syntax:
>>
>> auto (a, b, c, d) = expr;
>>
>> being equivalent to:
>>
>> auto t = expr; auto a = t[0]; auto b = t[1]; auto c = t[2 .. $];
>>
>> You can also do this with arrays, such that:
>>
>> float[3] xyz;
>> auto (x, y, z) = xyz;
>>
>> The Lithpers among you will notice that this essentially provides a
>> handy car,cdr shortcut for tuples and arrays:
>>
>> auto (car, cdr) = expr;
>
> Python 3 uses:
> car, *cdr = expr
> a, *b, c = [1,2,3,4,5] # leaves a=1, b=[2,3,4], c=5
>
> I would like D to have
> (car, cdr...) = expr
> (a, b..., c) = [1,2,3,4,5]
>
> for the equivalent.
>
> Our varargs syntax is b..., theirs is *b. So it mirrors a bit, there. :-)

Excellent idea!

Andrei