ref: 63ee97c65c38dfd6a8100e8386610b10cb2c0d77
dir: /lib/bio/test/bio-create.myr/
use std use bio const main = { var f std.mkdir("tmpout", 0o755); match bio.create("tmpout/test-create", bio.Wr, 0o644) | `std.Ok bio: f = bio | `std.Err m: std.fatal("Failed to open file: {}\n", m) ;; bio.close(f) }