On Thursday, 15 February 2018 at 00:34:33 UTC, Meta wrote:
On Thursday, 15 February 2018 at 00:27:40 UTC, Meta wrote:
On Wednesday, 14 February 2018 at 23:46:30 UTC, aliak wrote:
On Wednesday, 14 February 2018 at 15:14:24 UTC, Meta wrote:
Ooh yes, of course! Thank you :)
Even better:
import std.conv;
auto b = a.map!(to!float);
Actually, that won't quite work without redefining map a little:
Optional!U map(alias f, U = typeof(f(t.init)))()
{
etc...
}
Ah yes, true, also auto return would work. But then you'd still
need to do the typeof(f(T.init)) evaluation in the body... plus
you lose being able to see an explicit return type i guess...
hmm. So nevermind :)
Though a free function would be good me thinks. Then you could
use it seamlessly with std.algorithm.map.
Optional!U map(alias f, T, U = typeof(f(T.init)))(Optional!T opt)
{
return Optional!U(f(opt.t));
}
Cheers,
- Ali
