Denis Koroskin wrote:
On Mon, 18 May 2009 04:28:24 +0400, Andrei Alexandrescu
<seewebsiteforem...@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.
It's actually there already: std.range.iota. Incidentally it does the
right thing with floats because it iterates by the recurrence formula
iter(i) = lowest + i * step (where i is an integer). But there's an
unrelated bugzilla about it.
Andrei
