[fpc-devel]Proposal for audo-destructors

[Florian Klaempfl]

netsurfer at au.ru wrote:

> Hello.
> 
> Absence of automatic construction/destruction of 
> classes is very painfull and it can significantly 
> degrade the
> development process (i.e. smart pointers and RAII are 
> impossible). It's one of the greatest flaws of Pascal 
> relatevly to
> C   (the second thing are Templates of cource). Are 
> there any plans for serious language extensions in 
> this way for "post
> 2.0" releases of FPC ?
> 
> P.S. The simpliest proposal for syntax for auto 
> construction/destruction could be like (maybe with 
> some restrictions
>      on constructors/destructors):
> 
>  Procedure Something;
>  Var T:tMyClass;Auto;
>  Begin   <- T auto created here
>     ...
>     If ... Then Exit; <- T auto destructed here
>     ...
>  End;    <- T auto destructed here
> 
>  P.P.S. The "auto" modifier should affect only stack 
> variables.
>         There's no great need of this for global vars.
> 
> 

You can use custom variants for this, however, these aren't implemented 
yet completly in the fpc rtl.