Loosen “Local procedure/function assigned to procedure variable” restriction gracefully

Question

Consider the following test-case:

{ CompilerVersion = 21 }
procedure Global();

  procedure Local();
  begin
  end;

type
  TProcedure = procedure ();
var
           


        

Answer 1

If one really needs to use local procedures in D7 or earlier one could use this trick:

procedure GlobalProc;
var t,maxx:integer; itr,flag1,flag2:boolean; iterat10n:pointer;
    //Local procs:
    procedure iterat10n_01;begin {code #1 here} end;
    procedure iterat10n_10;begin {code #2 here} end;
    procedure iterat10n_11;begin {code #1+#2 here} end;
begin
    //...
    t:=ord(flag2)*$10 or ord(flag1);
    if t=$11 then iterat10n:=@iterat10n_11
      else if t=$10 then iterat10n:=@iterat10n_10
        else if t=$01 then iterat10n:=@iterat10n_01
          else iterat10n:=nil;
    itr:=(iterat10n<>nil);
    //...
    for t:=1 to maxx do begin
        //...
        if(itr)then asm
            push ebp;
            call iterat10n;
            pop ecx;
        end;
        //...
    end;
    //...
end;

However the problem is that adress-registers could differ on different machines - so it's needed to write some code using local proc call and look via breakpoint which registers are used there...

And yeah - in most real production cases this trick is just some kind of palliative.