ref: 3303b2c61b4381500b39b1d3ce6f95b9a21ed4f4
dir: /lib/bio/test/bio-unitwr.myr/
use std use bio const main = { var f match bio.create("tmpout/test-unitwr", bio.Wr, 0o644) | `std.Ok bio: f = bio | `std.Fail m: std.fatal("Unable to open data file: {}\n", m) ;; bio.putb(f, 42) bio.putc(f, 'ה') bio.putb(f, 0xa) bio.close(f); }