Am 01.07.2018 um 04:14 schrieb Michalis Kamburelis:
2018-07-01 4:01 GMT+02:00 Vojtěch Čihák <vojtech.ci...@atlas.cz>:
this seems to be misleading error message. TFPGObjectList works well for
objects (classes). When I tried to push record to it, I got the same error
message. TVec3 is not class, right?
Indeed, it's a misleading message. The message
...identifier idents no member "Free"
doesn't talk about the line
list.Free;
(which is fine, "list" is an instance of a class). It talks most
likely about the "Free" call inside FGL implementation in
"""
procedure TFPGObjectList.Deref(Item: Pointer);
begin
if FFreeObjects then
T(Item^).Free;
end;
"""
If you look inside the FGL unit sources of your FPC version, you will
likely find this to be at line 992 :)
Short explanation:Since your TVec3 is probably not a class, you cannot
do "Free" on it.
The solution is to use TFPGList instead of TFPGObjectList. You should
also define an equality operator if TVec3 is a record. See e.g. my
example in
https://castle-engine.io/modern_pascal_introduction.html#_operator_overloading
(scroll to the example with TMyRecordList).
I've now added a TObject constraint to TFPGObjectList and the TData
parameter of TFPGObjectMap. Sadly I can't add it to
TFPGInterfacedObjectList or TFPGInterfacedObjectMap as currently both
interfaces and objects implementing interfaces can be used.
Regards,
Sven
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