packed Object THAMTNode

Unit

hamt.internals

Declaration

type generic THAMTNode<TItem,TInfo> = packed object(TObject)

Description

Low-level HAMT from which further collections are built

Each node has a reference counter and stores up to 32 pointers or items.
The HAMT node is either mutable (if reference counter is 1) or immutable with copy-on-write (if reference counter is >= 2) like strings.
Using the nodes directly would be more efficient than using the map classes, since you have one less memory access without the class instance.

Hierarchy

• TObject
• THAMTNode

Overview

Internal Classes and Records

	THAMTArray = packed object(TObject)
	THAMTEnumerator = object(TObject)

Internal Types

	PHAMTArray = ˆTHAMTArray;
	PHAMTNode = ˆTHAMTNode;
	PItem = ˆTItem;
	PPHAMTNode = ˆPHAMTNode;
	THAMTArrayIndex = integer;

Fields

internal const HAMTArrayEnd = -1;

Methods

	class procedure decrementRefCount(node: PHAMTNode); static;
	class procedure decrementRefCountButKeepChildren(node: PHAMTNode); static;
	class function allocateEmpty(): PHAMTNode; static;
	class function uniqueNode(ppnode: PPHAMTNode): PHAMTNode;
	class function include(ppnode: PPHAMTNode; const item: TItem; allowOverride: boolean): Boolean; static;
	class function exclude(ppnode: PPHAMTNode; const item: TItem): Boolean; static;
	function find(const item: TItem): PItem;
	function contains(const item: TItem): boolean;

Description

Internal Types

	PHAMTArray = ˆTHAMTArray;

	PHAMTNode = ˆTHAMTNode;

	PItem = ˆTItem;

	PPHAMTNode = ˆPHAMTNode;

	THAMTArrayIndex = integer;

Fields

	internal const HAMTArrayEnd = -1;

Methods

	class procedure decrementRefCount(node: PHAMTNode); static;

	class procedure decrementRefCountButKeepChildren(node: PHAMTNode); static;

	class function allocateEmpty(): PHAMTNode; static;

	class function uniqueNode(ppnode: PPHAMTNode): PHAMTNode;

	class function include(ppnode: PPHAMTNode; const item: TItem; allowOverride: boolean): Boolean; static;

	class function exclude(ppnode: PPHAMTNode; const item: TItem): Boolean; static;

	function find(const item: TItem): PItem;

	function contains(const item: TItem): boolean;