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Annotation of 41BSD/cmd/apl/documents/apl.man, revision 1.1.1.1

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                      2: 
                      3: APL(I)                       7/10/78                       APL(I)
                      4: 
                      5: 
                      6: NAME
                      7:      apl  -  The UCSF APL interpreter
                      8: 
                      9: SYNOPSIS
                     10:      apl
                     11: 
                     12: DESCRIPTION
                     13:      The UCSF APL interpreter contains all the APL 360  operators
                     14:      plus  execute  (epsilon),  scan,  and  relational  character
                     15:      operators.  The  maximum  workspace  size  is  about  50,000
                     16:      bytes.
                     17: 
                     18:      Function definition is not what you would expect.  Functions
                     19:      are created and modified with the system editor. Type `)EDIT
                     20:      fname' or `)EX fname' to creat or modify  a  function.  Type
                     21:      `)READ fname' if it exists and doesn't need editing.
                     22: 
                     23:      The following I-beams are recognized by APL:
                     24: 
                     25:            1iF             Open F for reading.
                     26: 
                     27:            2iF             Create F for writing.
                     28: 
                     29:            3iF             Append to F.
                     30: 
                     31:            1i0, 2i0, 3i0   Close the named channel.
                     32: 
                     33:      Only one read channel and one  write  channel  may  be  open
                     34:      simultaneously.  When a file is open for reading, references
                     35:      to the quad or quote-quad variable are  actually  references
                     36:      to the named file. When open for writing, assignments to the
                     37:      quad variable are written to the file.
                     38: 
                     39:            10iC    Send command C to the shell.
                     40:      The command will be executed as if it were typed at  a  UNIX
                     41:      terminal.  This is equivalent to the `!' feature of the edi-
                     42:      tor.
                     43: 
                     44:      Monadic I-beam functions are: 20 for the time of day, 21  to
                     45:      return  CPU  time used, 22 to return WS free in bytes, 24 to
                     46:      return the starting time, 25 to return the date, 28  to  re-
                     47:      turn  the  starting date, 29 to read the index origin, 30 to
                     48:      read the terminal width, 31 to read the  printing  precision
                     49:      (or `digits'), and 32 to run the shell.
                     50: 
                     51: BUGS
                     52:      No trace function or state indicator.
                     53: 
                     54:      No `)WSID' command. The existing system commands  take  only
                     55:      one argument.
                     56: 
                     57:      A `)WRITE fname' command is needed to get at functions which
                     58:      exist only in workspaces.
                     59: 
                     60: 
                     61: 
                     62:                               - 1 -
                     63: 
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