[fpc-pascal] Managed record questions

Sven Barth pascaldragon at googlemail.com
Thu Mar 8 07:48:16 CET 2018

Am 08.03.2018 04:44 schrieb "Ryan Joseph" <ryan at thealchemistguild.com>:

1) Given the example below we have a template for a standard ref counted
record. Shouldn’t there be some “meta record” type that implements this
automatically? I’m thinking about adding this to some types but the idea of
recreating this same template every time is daunting and records don’t have
inheritance so there’s no way to capture it once.

You could use an include file containing both the declaration and
implementation controlled by compiler defines together with a macro for the
type name.

2) This new feature begs the question why can’t classes be kept on the
stack OR the heap now like in c++? There’s countless times I allocate a
class on the heap (because you have to) when I could have kept it on the
stack and the compiler called some destructor it when it goes out of scope.
It’s such a common pattern and a shame to be dynamically allocating/freeing
memory every time. C++ really cleans up a lot of memory garbage by making
it an option of how your classes are allocated but FPC is stuck in the
middle with structs/classes being different enough you need to decide once
and commit to that memory management scheme for all uses.

No, this doesn't beg the question, because Object Pascal classes are
designed in the principle to reduce on the heap. Changing this would not
only mean quite some changes in the compiler/RTL with no real gain, but it
would also change a core aspect of the Object Pascal language.

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