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The predicates below can be used for switching between the implicit-
and the explicit stream based I/O predicates.
- set_input(+Stream)
-
Set the current input stream to become Stream. Thus,
open(file, read, Stream), set_input(Stream) is equivalent to see(file).
- set_output(+Stream)
-
Set the current output stream to become Stream.
- current_input(-Stream)
-
Get the current input stream. Useful to get access to the status
predicates associated with streams.
- current_output(-Stream)
-
Get the current output stream.