http://d.puremagic.com/issues/show_bug.cgi?id=4085
[email protected] changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #4 from [email protected] 2013-07-25 04:20:03 PDT --- (In reply to comment #3) > *** Issue 10712 has been marked as a duplicate of this issue. *** Copy pasting a proposed implementation from 10712. Pretty much the same thing, but also handles indiscriminate types. It passes the prior tests, as well as handles the useage with doubles, or chars: //-------- template Iota(alias h) { alias Iota = IotaImpl!(0, h, 1); } template Iota(alias l, alias h) { alias Iota = IotaImpl!(l, h, 1); } template Iota(alias l, alias h, alias inc) { alias Iota = IotaImpl!(l, h, inc); } template IotaImpl(alias l, alias h, alias inc, T...) { alias E = CommonType!(l, h, inc); static if (inc == 0) static assert(0, "increment must be non-0"); else static if (inc > 0 && l >= h) alias IotaImpl = T; else static if(inc < 0 && l <= h) alias IotaImpl = T; else alias IotaImpl = IotaImpl!(cast(E)(l + inc), h, inc, T, cast(E)l); } //-------- //-------- foreach(idx; Iota!(0, 0)) write(idx, ' '); // prints writeln(); foreach(idx; Iota!(0, 10)) write(idx, ' '); // prints 0, 1, ..., 9 writeln(); foreach(idx; Iota!(2, 10)) write(idx, ' '); // prints 2, 3, ..., 9 writeln(); foreach(idx; Iota!(0, -10, -1)) write(idx, ' '); // prints 0, -1, ..., -9 writeln(); foreach_reverse(idx; Iota!(-9, 1)) write(idx, ' '); // prints 0, -1, ..., -9 writeln(); foreach(idx; Iota!(0.5, 10)) write(idx, ' '); // prints 0.5, 1.5, ..., 9.5 writeln(); foreach(idx; Iota!(0, 1, 0.1)) write(idx, ' '); // prints 0 0.1 ... 0.9 writeln(); foreach(idx; Iota!('a', cast(char)('z' + 1), cast(char)1)) write(idx, ' '); // prints a b ... z writeln(); //-------- Maybe it's time to submit this to phobos? This belongs in typecons? -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
