muller@inmet.UUCP (03/23/84)
#N:inmet:17900013:000:1424
inmet!muller Mar 22 00:50:00 1984
Question: How does one write a procedure to be included in a Units
library in Apple PASCAL to which you can pass a variable array (by
reference) such that the subscript range does not need to determined
when the procedure is written (i.e., variable dimensioning)? If you
list the procedure with its parameters in the Interfaces section of the
unit, and you give a TYPE (presumably defined in the as yet unwritten
calling program) as the identifier of the array, in order to make sure
the types agree between the calling program and the porcedure in the unit,
the compiler doesn't like it. If you then define the TYPE of that array
before the procedure declaration, you don't have variable sizing, since
you then have to declare the sizing variables, and the type statement has
to go before the var statement.
In a related question, can you declare variables local to a single
procedure in a Unit by placing them in the procedure block rather than in
the Interface section? (Variable parameters are declared in the Interface
section, and not in the subsequent procedure definition.)
Finally, in another related question, by what criterion does Apple
PASCAL think that two arrays are of the same type? Same element type and
same subscript range? or must they be declared to be the same type? and
if so then how does one pass a type to a Unit?
Thanx, Jim Muller harpo!inmet!muller or ima!inmet!muller