ref: 062038c04a1cb9b7b161b670c5a3a948aaed42d1
dir: /libbio/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.Some bio: f = bio | `std.None: std.fatal(1, "Failed to open file\n") ;; bio.close(f) }