[Lazarus] *** GMX Spamverdacht *** Re: FW: Re: more file operation problems

[Sven Barth]

Am 15.12.2011 17:33, schrieb Jürgen Hestermann:
>
>
> Chris Kelling schrieb:
>> It is confirmed - I forgot about ANSISTRING being a pointer type, and
>> when I was writing the record out it wrote the address, not the data.
>> Of course, when I read it back in, the address was not valid and this
>> caused the error (derefrencing the non-existent pointer).
>
> I often read that users don't need to bother about implementation
> details of certain things (strings or dynamic array types or ...).
> This clearly shows how important such informations are and that generic
> types are pitfalls.
> You never realy know what you get.
> If you would have used AnsiString instead of the generic String you
> would have got an error
> and so would have been reminded that your assumptions (AnsiStrings) are
> not valid.

With 2.6 and newer you'll also get an error if you use "String" and the 
record's unit is compiled in long string mode.

Regards,
Sven