lib/std/fs/File.zig             |  23 ++++
 lib/std/io.zig                  |  14 +-
 lib/std/io/AllocatingWriter.zig |  17 ++-
 lib/std/io/BufferedWriter.zig   | 222 ++++++++++++++++++--------------
 lib/std/io/CountingWriter.zig   |  20 ++-
 lib/std/io/Writer.zig           |  13 ++
 6 files changed, 196 insertions(+), 113 deletions(-)