Jérôme M. Berger wrote:
Andrei Alexandrescu wrote:
Jérôme M. Berger wrote:
- A floating point range should allow you to specify the iteration
step, or else it should allow you to iterate through all numbers that
can be represented with the corresponding precision;
We don't have that, so you'd need to use a straigh for statement.
struct FloatRange {
float begin, end, step;
bool includeBegin, includeEnd;
int opApply (int delegate (ref float) dg) {
whatever;
}
whatever;
}
- The second issue remains: what if I want to include b but not b+ε
for any ε>0?
real a, b;
...
for (real f = a; f <= b; update(f))
{
}
I'd find it questionable to use ranged for with floats anyway.
So would I. But a range of floats is useful for more than iterating
over it. Think interval arithmetic for example.
Cool. I'm positive that open ranges will not prevent you from
implementing such a library (and from subsequently proposing it to
Phobos :o)).
Andrei
