Property attributes

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Revision as of 10:31, 20 October 2007 by Paul Ishenin (talk | contribs)
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Syntax Diagram

 PropertyDeclaration ::= PROPERTY Identifier [PropertyInterface] [PropertySpecifiers]   [Directives]
PropertySpecifiers ::= [ ... ] [ ... ] [ATTRIBUTES AttributesArray]
AttributesArray ::= '[' (AttributeDeclaration [, AttributeDeclaration]) ']'
AttributeDeclaration ::= '<string>':'<string>'

Declaration Examples

<delphi> TmenuItem = class(...) ... property Detachable: Boolean read FDetachable write SetDetachable attributes

['widgetsets:qt,gtk,win32', 'implementor:Vasya Pupkin', 'creation-date:01.01.2007'];

... end; </delphi>

<delphi> TxxxDatabase = class(...) ... property TransactionModel: TTransactionModel read FtransactionModel write

SetTransactionModel attributes ['engines:firebird,oracle,sybase-asa'];

... end; </delphi>

How to store additional info

There was 2 suggestions about place for properties attributes:

  1. RTTI. Advantage - easy access from application. Disadvantage - bigger final executable.
  2. PPU. Advantage - info will not be added to executable. Disadvantage - more complicated way of accessing data.

As result of discussion PPU storage has been selected.