Info-Mac 4/Info_Mac IV CD-ROM (Pacific HiTech Inc.)(August 1994).iso/Development/Source/DBL Pascal Library/ErrSignal/TestSignals_1.p

Text File | 1991-03-29 | 1KB | 93 lines

program TestSignals;

    uses
        ErrSignal;

    type
        foo = object
                procedure bar (a, b: integer);
            end;


    procedure Proc1;
        var
            catch: OSErr;
        label
            99;
    begin
{•  Signal(9);•}
        catch := CatchSignal;
        if catch <> noErr then
            begin
                writeln('catch in Proc1 returned ', catch : 1);
                SignalHandlerDone;
{•    goto 99;•}
                Exit(Proc1);
                TerminateSignalHandler;
            end;
        if CatchInBlock then
            writeln('catch established in Proc1');
        Signal(2);
99:
    end;

    procedure foo.bar (a, b: integer);
    begin
        a := b + 1;
    end;

    procedure Proc2;
        var
            baz: foo;
    begin
        Proc1;
        Signal(3);
        new(baz);
        baz.bar(1, 2);
    end;

    procedure Start;
        var
            catch: OSErr;
    begin
        InitSignals(sigFail);
        catch := CatchSignal;
        if catch <> noErr then
            begin
                writeln('catch in Start returned ', catch : 1);
                Halt;
            end;
        writeln('catch established in Start');
        Proc2;
    end;

    procedure Proc3 (a: Boolean);
        label
            99;
        procedure Proc4;
            procedure Proc5;
                procedure Proc6;
                    procedure Proc7;
                    begin
                        if a then
                            goto 99;
                    end; {Proc7}
                begin
                    Proc7;
                    Exit(Proc5);
                end; {Proc6}
            begin
                Proc6;
            end; {Proc5}
        begin
            Proc5;
        end; {Proc4}
    begin
        Proc4;
99:
    end; {Proc3}

begin
    ShowText;
    Start;
end.