FPC New Features 2.4.2

About this page

Below you can find a list of new features introduced since the previous release, along with some background information and examples.

All systems

Language

For-in loop support

• Overview: for-in loops allow for easy iterating over the contents of a container type, as well as over some primitive types (arrays, strings, sets) using a uniform syntax.
• Notes: The basic implementation is Delphi-compatible, but in addition FPC also supports some extra functionality. This functionality is described on the page below.
• More information: for-in_loop

Sealed and Abstract classes

• Overview: A sealed class is a class which can not be inherited by other classes. An abstract class normally cannot be instantiated, but for compatibility with Delphi abstract does nothing at the moment.
• Notes: Delphi-compatible.
• More information: https://gitlab.com/freepascal.org/fpc/source/-/blob/main/tests/test/tabstract1.pp