The DEC-10 prolog IO predicates are available with the library
dec10
:
see(
+File)
see/1
or a filename. If it is a
filename, the following action is taken: If there is a stream opened by
see/1
associated with the same file already, then it becomes the
current input stream. Otherwise, the file File is opened for
input and made the current input stream.
seeing(
?FileName)
see/1
, with the current input stream, if it is not
user_input
, otherwise with user
.
seen
user_input
.
tell(
+File)
tell/1
or a filename. If it is a
filename, the following action is taken: If there is a stream
opened by tell/1
associated with the same file already, then it
becomes the current output stream. Otherwise, the file File
is opened for output and made the current output stream.
telling(
?FileName)
tell/1
, with the current output stream, if
it is not user_output
, otherwise with user
.
told
user_output
.