At 08:42 12-9-2004, [EMAIL PROTECTED] 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.
Again, what if you assign T to a global var or a class member ?
So in your example:
Procedure Something;
Var T:tMyClass;Auto;
Begin <- T auto created here
GlobalT := T; <- What would this do ?
...
If ... Then Exit; <- T auto destructed here
...
End; <- T auto destructed here
IMO if you want such behaviour, you can use interfaces.
Marc
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