Negative

[Andrew Fedoniouk]

Hi, Carlos

"Carlos Santander" <csantander619 at gmail.com> wrote in message 
news:dtvtgt$2mvh$1 at digitaldaemon.com...
> Andrew Fedoniouk escribió:
>>
>> This is real life example:
>>
>> Logger log = getLogger();
>> try {
>>       File outf = getOutputFile(); // state managed outside
>>       File inf = getInputFile(); // state managed outside
>>       File tmpf = createTempFile();
>>       // lots of code
>> } catch (Object e)  {
>>       log.logFailure("...");
>>       throw e;
>> } finally {
>>      delete tmpf;
>> }
>> log.close();
>>
>> ----------------------------------
>> Andrew.
>>
>>
>
> This is not rhetorical, but honest: in the cases where you said "state 
> managed
> outside", how do you do that? i.e., how do you know for sure that the 
> files will
> be closed, provided that destructors are not guaranteed to be run and you 
> can't return auto references?

"get" in getOutputFile implies that file exists somewhere and opened by 
someone else
so code here cannot delete it.

In contrary "create" in createTempFile says that it creates new instance
so we are owning it - must delete.

If getOutputFile creates new instance then
finally {
     delete tmpf;
     delete outf;
     delete inf;
}
will be enough.

In any case it shall be something one: either
try-catch-finally or on_scope_xxx() - two similar
and probably conflicting mechanisms is a bad design.

( This is why I like Java - with some minor exceptions
 its grammar just perfect for the the domain it serves.
 Ascetic but clean and simple. )

Andrew Fedoniouk.
http://terrainformatica.com