[fpc-devel] Wrong docs: not initialized global variables
pascaldragon at googlemail.com
Sat Mar 24 23:00:38 CET 2018
Ondrej Pokorny <lazarus at kluug.net> schrieb am Sa., 24. März 2018, 20:49:
> This is not correct. Global simple variables are always initialized. At
> least in Delphi it is so:
> http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Variables_(Delphi) "If
> you do not explicitly initialize a global variable, the compiler
> initializes it to 0."
So, Delphi *does* document it. Okay, in that case the documentation needs
to be updated, cause up to now the assumption has been that this is an
> Another question about this sentence in FPC docs: "Managed types are
> always initialized: in general this means setting the reference count to
> zero, or setting the pointer value of the type to Nil."
> Does it mean I can assume a local string variable is always (=whenever
> the routine is called) initialized to ''? I.e. that TestB always returns
For managed types this is indeed guaranteed. Otherwise there'd be
exceptions upon the first use of the variable as the RTL would assume that
the value is valid.
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