class output_channel :?onclose:unit -> unit -> Pervasives.out_channel ->
out_obj_channel
out_channel
.
The method pos_out
reflects the real position in the channel as
returned by Pervasives.pos_out
. This works for both seekable and
non-seekable channels.
The method close_out
also closes the underlying out_channel
.
There is some implicit logic to either use close_out
or close_out_noerr
depending on whether the immediately preceding operation already reported
an error.
onclose
: this function is called when the close_out
method is
invoked, just after the underlying out_channel
has been closed.