date and time created 91/04/16 14:58:54 by bostic

[unix-history] / usr / src / usr.bin / pascal / pdx / test / fproc.p

(*
* Copyright (c) 1980 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)fproc.p     5.1 (Berkeley) %G%
*)

program fproc(output);
   var
   i :integer;

   procedure print(function frtn :integer);
       begin
           write(frtn:3,'   formal routine =');
       end;

   procedure lvl1(function form: integer);
       label   1;
       var
       loc :integer;

       function eval :integer;
           begin
               if loc = 8 then begin
                       writeln(' non-local jump');
                       goto 1;
               end;
               eval := loc;
           end;

   begin
       loc := i;
       i := i - 1;
       if (loc = 4) or (loc = 8) then
               lvl1(eval)
       else if loc > 0 then
               lvl1(form);
1:      write('Stack frame:',loc:3,'   formal print =');
       print(form);
       writeln(form:3);
   end;

   function geval :integer;
       begin
           geval := i;
       end;

   begin
       writeln('This should print levels 0-3, with formal values of 4.');
       writeln('Level 4 should jump to level 8.');
       writeln('Finally levels 8-10 should print with formal values of -1.');
       i := 10;
       lvl1(geval);
   end.