How should I re-raise a Delphi exception after logging it?

Question

Do you know a way to trap, log, and re-raise exception in Delphi code? A simple example:

procedure TForm3.Button1Click(Sender: TObject);
begin
  try
    rais         


        

Answer 1

Following on from Craig Young's post, I've used something along the lines of the following code successfully. You can preserve the original exception location by using the "at" identifier with the ExceptAddr function. The original exception class type and information is also preserved.

procedure MyHandleException(AMethod: string);
var
  e: Exception;
begin
  e := Exception(AcquireExceptionObject);
  e.Message := e.Message + ' raised in ' + AMethod; 
  raise e at ExceptAddr;
end;

try
  ...
except
  MyHandleException('MyMethod');
end;