Template:Object Types

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Feature Record Adv Record Object Class
Encapsulation (combining data and methods + hiding visibility) No Yes Yes Yes
Inheritance No No Yes Yes
Class constructor and destructor No Yes Yes Yes
Polymorphism (virtual methods) No No Yes Yes
Memory allocation Stack Stack Stack Heap (Only)
Setting fields to zero on allocation
Managed Types only Managed Types only Managed Types only All fields
Default() function returns a constant with
all fields zeros all fields zeros all fields zeros returns nil
Operator overload (global) Yes Yes Yes Yes
Operator overload (in type only) No Yes No No
Type helpers No Yes No Yes
Virtual constructors, class reference No No No Yes
Variant part (case) as c/c++ union Yes Yes No No
Bitpacked (really packing) Yes Yes No No

Modified from https://forum.lazarus.freepascal.org/index.php/topic,30686.30.html (original author: ASerge).