ref: 0f95e4517ef3aa5d719b0ba8a20e8c64e96b0c46
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); }