Automatic Foreach

[janderson]

Bill Baxter wrote:
> janderson wrote:
>> What do you think?
> 
> I think it's already hard enough to figure out what's going to get 
> called by something like foo(array)
> 
> It could be
> - foo(int[] x)
> - foo(int[] x...)
> - foo(T)(T x)
> - foo(T)(T[] x)
> - foo(T...)(T x)
> - struct foo { static foo opCall(int[]); }
> - struct foo { static foo opCall(int[]...); }
> - struct foo { static foo opCall(T)(T x); }  etc
> - or struct Foo with non-static opCall on instance foo
> - or all the same stuff on class  ...
> 
> So I don't think another meaning for foo(array) is really helpful.
> 
> I *do* like the idea of an expression (not a statement) that has 
> foreach-like abilities.  But I think it should come with some 
> distinguishing syntax.
> 
> In Python it's just [expr(x) for x in array]
> Which resonates with Pythons normal loopoing:
>    for x in array: expr(x)
> 
> So direct translation of that idea to D would be
>    [expr(x) foreach(x; array)];
> 
> Seems not so terrible a syntax to me.
> 
> --bb

I think I prefer:

foo(array[]);

-Joel