System directives

Some of the directives listed below have the optional parameter ``LUN''. It is the logical unit number for input/output streams. If this parameter is omitted, the default value is used (see appendix ). All COMIS directives start with a special character "!" to avoid a conflict with user defined routines.

CALL !HELP

This directive ouputs to terminal short help about directives.

CALL !FILE [lun,] file_name

By default the system input device is the terminal. This directive sets the input stream to the file file_name. The same action can be performed in a user routine by calling:

CALL CSFILE ('file_name')

The system switches to the terminal again when the file is read or an \excl{EOF} directive is reached.

CALL !EOF

This directive closes the input file. The next string will be accepted from the terminal.

CALL !LOGFILE [lun,] file_name

The transcript of the interactive session will be collected in the file file_name. This file can be used in the FILE directive later (to repeat the same dialogue session, for example). The same action can be performed in a user routine by calling:

CALL CSLOG ('file_name')

CALL !FORTRAN

This directive sets the mode of compilation to ``Fortran''. This mode should be selected avoid syntactic conflicts when you want to process standard Fortran sources with the COMIS compiler. After getting this directive the compiler treats a 'C' character in the first column as a comment mark and every character in the sixth column as a continuation mark (unlike COMIS' free format syntax). This mode is the default.

CALL !COMIS

This directive sets the ``COMIS'' mode of compilation.

CALL !SHELL command

passes an operand line to the operating system for command processing. Does not cause a break.

CALL !SHOW memory

This directive shows the COMIS internal memory usage.

CALL !SHOW routines

This directive shows a list of routines currently known to COMIS.

CALL !SHOW commons

This directive shows list of common and global blocks currently known to COMIS.

CALL !SHOW names common_name

This directive shows declaration of common or global block with name common_name.

CALL !REMOVE cs_routine_name

This directive removes from the internal COMIS memory the comis routine with name cs_routine_name.

CALL !CLEAR

This directive clears the internal COMIS memory: it removes all comis routines and all common/global blocks declarations.

CALL !CHECKB

When the directive CHECKB is given COMIS will check during routines interpretation that the evaluated result of a array's subscript expression is greater than or equal to the corresponding lower dimension bound and does not exceed the corresponding upper dimension bound.

CALL !NOCHECKB

The directive NOCHECKB causes no check to be made during routines interpretation (default is CHECKB).

CALL !PARAM

The directive PARAM causes the COMIS compiler to insert additional code to provide all facilities for the treatment of actual arguments.

CALL !NOPARAM

With the directive NOPARAM you cannot obtain the argument's text and the Algol like manner of argument processing is not available (default is NOPARAM).