ref: 8cc0e63c31208a10d245f3115bde2e7b886b2770
dir: /libbio/test/bio-unitwr.myr/
use std use bio const main = { var f match bio.create("tmpout/test-unitwr", bio.Wr, 0o644) | `std.Some bio: f = bio | `std.None: std.fatal(1, "Unable to open data file") ;; bio.putb(f, 42) bio.putc(f, 'ה') bio.putb(f, 0xa) bio.close(f); }