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--- rfc:propertygetsetsyntax-implementation-details [2013/01/16 21:39] – Rewrite to current state cpriest
+++ rfc:propertygetsetsyntax-implementation-details [2013/01/21 19:38] – nikic
@@ Line 1: / Line 1: @@
 ====== Internal Implementation Details for Property Accessors ======
   * Version: 1.2
-  * Updated: 2013-01-16
+  * Updated: 2013-01-17
   * Author: Clint Priest <phpdev at zerocue dot com>
   * Contributors: Nikita Popov
@@ Line 43: / Line 43: @@
 </code>
-An additional byte was added to zend_function to specify the purpose of the function:
+The ''zend_function''s of the accessors have the ''ZEND_ACC_ACCESSOR'' flag set.
-<code c>
-zend_uchar purpose;
-</code>
-This was in lieu of using 4 additional fn_flag values for which there was not room.  There are presently five states purpose can be in, they are:
-<code c>
-#define ZEND_FNP_UNDEFINED			0		/* No special purpose function */
-#define ZEND_FNP_PROP_GETTER			1		/* Special purpose accessor: getter */
-#define ZEND_FNP_PROP_SETTER			2		/* Special purpose accessor: setter */
-#define ZEND_FNP_PROP_ISSETTER			3		/* Special purpose accessor: issetter */
-#define ZEND_FNP_PROP_UNSETTER			4		/* Special purpose accessor: unsetter */
-</code>
-All non-accessor functions have their purpose initialized to 0.
 ==== Compilation Changes ====
@@ Line 73: / Line 59: @@
 the property and if so checks that there is an accessor for the specific action (read/write, etc) being performed and
 handles the situation accordingly.
 Much of the pre/post magic call code that %%__get/__set/__isset/__unset%% used was refactored and centralized into their respective zend_std_call_*() functions.
 The new accessors also utilize these functions so that all pre/post condition handling is the same for accessors as they are for the magics.
-At this time, accessors also use the same recursive guarding mechanism to protect from recursion, however in the case of recursion with accessors
-a warning will be emitted if recursion is detected and that recursion is not called from the context of the accessor.
+A new function flag was added ''ZEND_ACC_CALL_GUARD'' which flags a function as "being called and guarded," this was necessary to allow for parent
+accessors being able to be properly called. In the case of recursion with accessors a warning will be emitted if recursion is detected and that
+recursion is not called from the context of the validly scoped accessor.
 For example a get accessor is allowed to get it's own value and does not produce a warning, but instead the ordinary property access routines occur while attempts to read that property from a context other than the get accessor will emit a warning and the value will be returned as NULL.
  * Error producing lines have been modified to produce a useful error report.  For example: Cannot override final property getter TimePeriod::$Hours

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