Pervasive functions.
val write_wrap : ?mode:[ `Clobber | `Append | `Atomic | `Atomic_update ] ‑> f:(Pervasives.out_channel ‑> 'a) ‑> string ‑> 'awrite_wrap ~atomic ~f fname Runs f on an out_channel. If mode is
`Atomic or `Atomic_update is set all the changes will be written to a
temporary file which will then be moved over fname otherwise we are
writing straight to fname.
Values for mode:
`Clobber: clear the file on opening (this is the default value)`Append: append to the file`Atomic: replace the file atomically when we are done writing it`Atomic_update: replace the file atomically when we are done writing it
iff its content has been modified.