rfc:class_properties_initialization

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rfc:class_properties_initialization [2010/07/30 10:10] – first draft version k.antczakrfc:class_properties_initialization [2010/07/30 10:47] – k.antczak
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   * Status: In Draft   * Status: In Draft
   * First Published at: http://wiki.php.net/rfc/class_properties_initialization   * First Published at: http://wiki.php.net/rfc/class_properties_initialization
 +  * Related RFC: [[rfc:annotations]], [[rfc:returntypehint]]
  
 ===== Introduction ===== ===== Introduction =====
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 ==== Why do we need it? ==== ==== Why do we need it? ====
  
-  * **annotations**+  * **code readability**
  
 ===== Proposal ===== ===== Proposal =====
  
-It's possible that this feature would be one of the best use with proposals: [[rfc:annotations]], [[rfc:returntypehint]] and [[rfc:enum]]+**Main idea** 
 + 
 +<code php> 
 +class Foo 
 +{ 
 +    private $var1 = function () { /* some callback ? */ } 
 + 
 +    private $var2 = array ( 'foo' => function () { /* some callback ? */ } ); 
 + 
 +    private httpRequest $var3 = NULL; 
 +} 
 +</code> 
 + 
 +instead of: 
 + 
 +<code php> 
 +class Foo 
 +{ 
 +    private $var1; 
 + 
 +    private $var2; 
 + 
 +    private $var3 = NULL; 
 + 
 +    public function __construct () 
 +    { 
 +        $this -> var1 = function () { /* some callback ? */ } 
 +         
 +        $this -> var2 = array ( 'foo' => function () { /* some callback ? */ } ); 
 + 
 +        if ( ( $request = SomeCore :: getRequest () ) instanceof httpRequest ) 
 +        { 
 +            $this -> var3 = $request; 
 +        } 
 +    } 
 +} 
 +</code> 
 + 
 +**Other / Related** 
 + 
 +* objects structures - structured objects initialization - like IoC/DI containers, where structure is not a result of code execution, but it's a result of strictly controlled design.
  
 <code php> <code php>
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     private $var1 = new Bar();     private $var1 = new Bar();
  
-    private $var2 = function () { /* some callback ? */ }+    private $var2 = Bar :: getInstance (); 
 +} 
 +</code>
  
-    private $var3 = array ( 'foo' => function () { /* some callback ? */ } );+* initialization with functions
  
-    private httpRequest $var4 = NULL;+<code php> 
 +class Foo 
 +{ 
 +    private $var1 = time (); 
 +     
 +    private httpRequest $var2 = getRequest ();
 } }
 +</code>
 +
 +===== Rejected initialization types =====
 +
 +<code php>
 +private $foo = $this -> someStuff(); // impossible/nonsense (?)
 </code> </code>
  
rfc/class_properties_initialization.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1

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