Out_buf.t
An output stream, ie. a place into which we can write bytes, with a buffer to amortize the cost of operations.
This can be a Buffer.t, an out_channel, a Unix.file_descr, etc.
Buffer.t
out_channel
Unix.file_descr
inherit Iostream__.Out.t
method output_char : char -> unit
Output a single char
method flush : unit -> unit
Flush underlying buffer