ref: 6042e40dd30c9e04934e635274a013f989695eb7
dir: /lib/iter/enum.myr/
use std pkg iter = type enumiter(@a) = struct idx : std.size sl : @a[:] ;; impl iterable enumiter(@a) -> (std.size, @a) generic byenum : (a : @a[:] -> enumiter(@a)) ;; generic byenum = {a -> [.sl = a, .idx = 0] } impl iterable enumiter(@a) -> (std.size, @a) = __iternext__ = {itp, valp if itp.idx == itp.sl.len -> false ;; valp# = (itp.idx, itp.sl[itp.idx]) itp.idx++ -> true } __iterfin__ = {itp, valp } ;;