TRttiInfo.DynArrayItemSize get 0 when no elType is present about mormot2 HOT 5 CLOSED

This function does what it is documented to do: " get the dynamic array type information of the stored item"
So if there is no stored item, elType is nil.

What do you want to achieve?
If you want to access the RTTI as mORMot does, use TRttiCustom and its properties, e.g. Cache.ItemSize.

Please use the forum to discuss this.

from mormot2.

program Project1;

{$APPTYPE CONSOLE}

{$R *.res}

uses
System.SysUtils,
mormot.core.rtti;

type
PSimpleLocator = ^TSimpleLocator;
TSimpleLocator = packed record
Id:Int32;
Pos: Int32;
end;
TSimpleLocatorArray = array of TSimpleLocator;

var
FXLocArrTyp :PRttiInfo;
sz:Integer;
begin
FXLocArrTyp := TypeInfo(TSimpleLocatorArray);

sz := FXLocArrTyp.DynArrayItemSize;
WriteLn('DynArrayItemSize: ItemSize is ' + sz.ToString); //DynArrayItemSize: ItemSize is 0

FXLocArrTyp.DynArrayItemType(sz);
WriteLn('DynArrayItemType: ItemSize is ' + sz.ToString); //DynArrayItemType: ItemSize is 8

WriteLn('You can see, something is wrong!');
end.

from mormot2.

I guess you are using Delphi, not FPC?

from mormot2.

yes delphi 10.3.3

from mormot2.

Should be fixed now.

Thanks for the feedback.

But anyway, you should better use TRttiCustom and its properties, e.g. Cache.ItemSize, rather than those lower level functions.

from mormot2.