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Annotation of 40BSD/cmd/apl/documents/apl.1, revision 1.1

1.1     ! root        1: .th APL I 7/10/78
        !             2: .sh NAME
        !             3: apl  \*-  The UCSF APL interpreter
        !             4: .sh SYNOPSIS
        !             5: .bd apl
        !             6: .sh DESCRIPTION
        !             7: The UCSF APL interpreter contains all the APL 360 operators
        !             8: plus execute (epsilon), scan, and relational character operators.
        !             9: The maximum workspace size is about 50,000 bytes.
        !            10: .s3
        !            11: Function definition is not what you would expect. Functions are
        !            12: created and modified with the system editor. Type `)EDIT fname'
        !            13: or `)EX fname' to creat or modify a function. Type `)READ
        !            14: fname' if it exists and doesn't need editing.
        !            15: .s3
        !            16: The following I-beams are recognized by APL:
        !            17: .in +.6i
        !            18: .s3
        !            19: 1iF            Open F for reading.
        !            20: .s3
        !            21: 2iF            Create F for writing.
        !            22: .s3
        !            23: 3iF            Append to F.
        !            24: .s3
        !            25: 1i0, 2i0, 3i0  Close the named channel.
        !            26: .in
        !            27: .s3
        !            28: Only one read channel and
        !            29: one write channel may be open simultaneously. When a file is open
        !            30: for reading, references to the quad or quote-quad variable are
        !            31: actually references to the named file. When open for writing,
        !            32: assignments to the quad variable are written to the file.
        !            33: .s3
        !            34: .in +.6i
        !            35: 10iC   Send command C to the shell.
        !            36: .in
        !            37: The command will be executed
        !            38: as if it were typed at a UNIX terminal. This is equivalent to
        !            39: the `!' feature of the editor.
        !            40: .s3
        !            41: Monadic I-beam functions are: 20 for the time of day, 21
        !            42: to return CPU time used, 22 to return WS free in bytes,
        !            43: 24 to return the starting time, 25 to return the date,
        !            44: 28 to return the starting date, 29 to read the index
        !            45: origin, 30 to read the terminal width, 31 to read the
        !            46: printing precision (or `digits'), and 32 to
        !            47: run the shell.
        !            48: .sh BUGS
        !            49: No trace function or state indicator.
        !            50: .s3
        !            51: No `)WSID' command. The existing system commands take
        !            52: only one argument.
        !            53: .s3
        !            54: A `)WRITE fname' command is needed to get at functions which
        !            55: exist only in workspaces.

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