[Lazarus] Can I assign items in an array all at once in FreePascal?

[Sven Barth]

Am 07.02.2016 12:51 schrieb "Michael Van Canneyt" <michael at freepascal.org>:
>
>
>
> On Sat, 6 Feb 2016, Sven Barth wrote:
>
>>>
>>> Because of 2 reasons:
>>>
>>> 1. Delphi introduced the create constructor.
>>>
>>> 2. A literal such as [10,20,30,40] is a set in pascal, not an array.
>>
>>
>> The answer is no longer correct with current Delphi versions. It now is
>> "because we haven't implemented it yet".
>
>
> Indeed. Well, I'm still on XE, the jump to XE 10 is for next month.
> Seems I'll have some reading up to do...
>
> Disregarding the fact that they introduced now 2 syntaxes to initialize an
> array, I'm curious what Jonas is going to say, because I remember he
always advocates that the type of an expression is determined by the
terms/factors in the expression, not by what you assign it to.
>
> For
>  ['abc','def'] + ['ghi','jkl']
> it is more or less clear.
>
> But what is the type of this expression:
>  [1,2,3] +  [4,5,6]
> is it an array or a set ?
>
> It probably means that they regard [] always as an array, and added some
> kind of automatic set-to-array type assignment compatiblity for types
that somehow fit in a set.

Well... FPC is handling them special as well, after all we support open
array parameters as well which clearly are no sets either. ;) They are
parsed into an array constructor nodes and then converted into either an
open array or a set by the node they're contained in. Support for normal
arrays will simply(TM) mean the addition of additional special cases...
(yes, it's easier said than done ;) )

Regards,
Sven
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