Am 07.05.2021 um 17:57 schrieb Ryan Joseph via fpc-devel:
On May 7, 2021, at 2:46 AM, Sven Barth via fpc-devel
<fpc-devel@lists.freepascal.org> wrote:
I cannot speak for others, but I think 90% of potential use cases for ref
counting
would be covered like this in my code: objects that only live inside a
procedure.
I think the same.
There's also a function which returns dynamically allocated memory but doesn't intend for you to
keep it around very long. Cocoa/Objective-C has a good system for this which is an
"autorelease pool" and while it's not language construct but rather a runtime system it
does rely on an "Any" type (called id in Objective-C) so that methods can be chained
together like this:
a := TArray.Create([1,2,3]).AutoRelease;
We can't do this in Pascal because the AutoRelease functions return type is not
compatible with the type of the caller. Could we add something like an "Any"
return type to Pascal which is a type that is compatible with any class? This relies on
an event loop that can capture this garbage and dispose of it but it goes a LONG way in
helping with common memory management problems.
Dynamic arrays are reference counted, thus you don't need to do any
manual memory management on them.
Regards,
Sven
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