Default (keyword)

From RemObjects Software

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Indexers, also known as Array Properties, are properties that can be treated like arrays:

Supplying the default attribute to an array index tells the compiler the implied property to be used if you do not supply one. Consider the following code:

x = class
  method GetItems(i: Integer): Integer;
  property Items[i: Integer]: Integer read GetItems ; default;
end;

Instead of referring to x.Items[5], you can now use the simpler x[5].

Multiple definitions of indexed properties (implicit overloading) are supported (with different array parameter types, of course) and so the following is valid also:

x = class
  method GetItems(i: Integer): String;
  method GetItems(s: String): String;
  property Items[i: Integer]: String read GetItems ; default;
  property Items[s: String]: String read GetItems ; default;
end;

Now x[5] and x['5'] can be used.

See Also

• Index Properties
• Properties
• Class Members
• Classes

Product: RemObjects Oxygene (formerly known as Chrome)
Current version: 3.0 Previous Versions: 'Joyride' (2.0), 'Floorshow' (1.5), 'Adrenochrome' (1.0)

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