foreach (x; a .. b) and foreach_reverse (x; a .. b) should be disallowed for floats

[Denis Koroskin]

On Mon, 18 May 2009 04:28:24 +0400, Andrei Alexandrescu <SeeWebsiteForEmail at erdani.org> wrote:

> Consider:
>
>      foreach (x; 1.0 .. 4.1) writeln(x);
>      foreach_reverse (x; 1.0 .. 4.1) writeln(x);
>
> This sucks. foreach with interval for floating-point types should be  
> disallowed.
>
>
> Andrei

It's useless, unless a step is specified (btw, integer iteration would benefit from having a step, too)

I don't mind if the whole .. feature is removed. It could be implemented in a library, with an optional step:

foreach (x; range(0, 100)) { // step is 1 implicitly
    // ...
}

foreach (x; range(0, 100, 2)) { // explicit step
    // ...
}

This feels more functional, although slightly longer to type.