On Sat, 30 Jun 2018, Florian Klämpfl wrote:
Am 30.06.2018 um 08:47 schrieb Sven Barth via fpc-devel:
Willibald Krenn <willibald.kr...@gmx.at <mailto:willibald.kr...@gmx.at>>
schrieb am Sa., 30. Juni 2018, 08:01:
TBH, I didn't know this issue existed in Delphi and I've done my
share of Delphi over time. I still maintain that
for managed types the compiler is responsible for some
minimal initialization (like it's done for records etc, no?).
The variables we're talking about here *are* initialized.
Maybe the term initialized is wrong and confusing. They are not initialized
in the sense of having defined values as
global variables have. Non-global managed types should not be considered as
being initialized (never!, like any other
type), this is also why the compiler warns (!) about this. They can be
considered as being "setup" by the compiler.
They contain valid values and none of the internal RTL
routines will crash when used with them. Everyone however expects result
variables of those to be initialized to Nil and
that is simply *not* a guaranteed given.
Also records only initialize their managed fields. All others are left as
garbage.
Managed fields of records are "setup" ;)
I will add a section about this in the documentation, seeing that people
often confuse the 2 concepts.
Michael.
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