Sheltran - CALL statement
Within the CALL argument list statement label arguments may be replaced
by one of the same keywords for I/O statements. Such arguments must be
preceded by an asterisk (*). E.g.
CALL sub ( ..., *XWHILE, ... )
- This feature can only be used in calls to existing FORTRAN
subroutines that specify alternate returns. The designers of SHELTRAN
consider this feature undesirable and only provided an interface to
existing routines, but have intentionally omitted the facility to
construct them, i.e. the 'RETURN i' statement is not allowed.
- Asterisk arguments must appear on the first line of the CALL