[fpc-pascal] Re: Fpc Access Violation if AppConfigDir doesn't exist.

[Giuliano Colla]

Il 11/02/2013 12:40, Mark Morgan Lloyd ha scritto:
> Giuliano Colla wrote:
>
>> However, what I've learned from this episode is that while attempting 
>> to save configuration data using TINIFile on program termination you 
>> should never use a try..finally construct, as it's suggested 
>> everywhere, but rather a try..except (or both). Otherwise you'll 
>> never be able to catch possible errors.
>
> I'd suggest that there are two separate cases here. In the first case, 
> near the start of a program you decide whether there is a preexisting 
> .ini file, create it if not, and if necessary update it to contain 
> e.g. the default name of a backend server. In the second case, at the 
> the end of a program run you save the current session's state.
>
I was speaking of the second case(saving configuration data to your .ini 
file).
When attempting to load configuration data, a try..finally is ok. If no 
configuration data are available you already have a built-in mechanism 
to provide default values.
But when attempting to save the current session's state at the end of 
the program, a try..finally will mask any error, and possibly lead to an 
unpleasant lock up.

Giuliano