Hi,
In this way, classes can be considered as polymorphism, just like objects.
So is it OK to allow abstract static function in abstract class to support
this feature directory? Currently it is forbidden in HEAD, only interfaces
can have static function.
Thanks
2007/4/27, Etienne Kneuss <[EMAIL PROTECTED]>:
Hi,
I've already proposed that 1-2 months ago, but now seems to be a good
time to discuss new things, so let's try again:
I believe it would be nice to be able to dynamically reference static
members, constants, and methods.
Currently, there is no way to do that and the only way would be to
create a static method and use call_user_func(array($classname,
'getThat'));
In other words:
class A {
public static $foo = 'value1';
const gee = 'value2';
public static function bar() { return 'value3'; }
// old way:
public static function getFoo() { return self::$foo; }
public static function getGee() { return self::gee; }
}
$classname = 'A';
echo $classname::$foo; // value1
echo $classname::gee; // value2
echo $classname::bar(); // value3
// --- instead of: ---
$classname = 'A';
echo call_user_func(array($classname, 'getFoo')); // value1
echo call_user_func(array($classname, 'getGee')); // value2
echo call_user_func(array($classname, 'bar')); // value3
which is quite slow.
Please take a look at the patch[1] I made for it. Comments would be
appreciated!
Regards,
1: http://patches.colder.ch/Zend/dynamic-static-calls.patch?markup
--
Etienne Kneuss
http://www.colder.ch
[EMAIL PROTECTED]
Men never do evil so completely and cheerfully as
when they do it from a religious conviction.
-- Pascal
Index: Zend/zend_language_parser.y
===================================================================
RCS file: /repository/ZendEngine2/zend_language_parser.y,v
retrieving revision 1.179
diff -u -r1.179 zend_language_parser.y
--- Zend/zend_language_parser.y 4 Mar 2007 16:25:57 -0000 1.179
+++ Zend/zend_language_parser.y 6 Mar 2007 14:43:49 -0000
@@ -642,6 +642,12 @@
| fully_qualified_class_name T_PAAMAYIM_NEKUDOTAYIM
variable_without_objects '(' { zend_do_end_variable_parse(BP_VAR_R, 0
TSRMLS_CC); zend_do_begin_class_member_function_call(&$1, &$3 TSRMLS_CC); }
function_call_parameter_list
')' { zend_do_end_function_call(NULL, &$$, &$6, 1,
1 TSRMLS_CC); zend_do_extended_fcall_end(TSRMLS_C);}
+ | variable_class_name T_PAAMAYIM_NEKUDOTAYIM T_STRING '(' {
zend_do_begin_class_member_function_call(&$1, &$3 TSRMLS_CC); }
+ function_call_parameter_list
+ ')' { zend_do_end_function_call(NULL, &$$, &$6, 1,
1 TSRMLS_CC); zend_do_extended_fcall_end(TSRMLS_C);}
+ | variable_class_name T_PAAMAYIM_NEKUDOTAYIM
variable_without_objects '(' { zend_do_end_variable_parse(BP_VAR_R, 0
TSRMLS_CC); zend_do_begin_class_member_function_call(&$1, &$3 TSRMLS_CC); }
+ function_call_parameter_list
+ ')' { zend_do_end_function_call(NULL, &$$, &$6, 1,
1 TSRMLS_CC); zend_do_extended_fcall_end(TSRMLS_C);}
| variable_without_objects '(' {
zend_do_end_variable_parse(BP_VAR_R, 0 TSRMLS_CC);
zend_do_begin_dynamic_function_call(&$1 TSRMLS_CC); }
function_call_parameter_list ')'
{ zend_do_end_function_call(&$1, &$$, &$4, 0, 1
TSRMLS_CC); zend_do_extended_fcall_end(TSRMLS_C);}
@@ -795,6 +801,11 @@
static_member:
fully_qualified_class_name T_PAAMAYIM_NEKUDOTAYIM
variable_without_objects { $$ = $3; zend_do_fetch_static_member(&$$, &$1
TSRMLS_CC); }
+ | variable_class_name T_PAAMAYIM_NEKUDOTAYIM
variable_without_objects { $$ = $3; zend_do_fetch_static_member(&$$, &$1
TSRMLS_CC); }
+;
+
+variable_class_name:
+ reference_variable { zend_do_end_variable_parse(BP_VAR_R, 0
TSRMLS_CC); zend_do_fetch_class(&$$, &$1 TSRMLS_CC); }
;
@@ -930,6 +941,7 @@
class_constant:
fully_qualified_class_name T_PAAMAYIM_NEKUDOTAYIM T_STRING
{ zend_do_fetch_constant(&$$, &$1, &$3, ZEND_RT TSRMLS_CC); }
+ | variable_class_name T_PAAMAYIM_NEKUDOTAYIM T_STRING {
zend_do_fetch_constant(&$$, &$1, &$3, ZEND_RT TSRMLS_CC); }
;
%%
Index: tests/lang/041.phpt
===================================================================
RCS file: tests/lang/041.phpt
diff -N tests/lang/041.phpt
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ tests/lang/041.phpt 6 Mar 2007 14:43:49 -0000
@@ -0,0 +1,14 @@
+--TEST--
+Dynamic access of static members
+--FILE--
+<?php
+class A {
+ public static $b = 'foo';
+}
+$classname = 'A';
+echo $classname::$b;
+?>
+===DONE===
+--EXPECT--
+foo
+===DONE===
Index: tests/lang/042.phpt
===================================================================
RCS file: tests/lang/042.phpt
diff -N tests/lang/042.phpt
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ tests/lang/042.phpt 6 Mar 2007 14:43:49 -0000
@@ -0,0 +1,14 @@
+--TEST--
+Dynamic access of constants
+--FILE--
+<?php
+class A {
+ const B = 'foo';
+}
+$classname = 'A';
+echo $classname::B;
+?>
+===DONE===
+--EXPECT--
+foo
+===DONE===
Index: tests/lang/043.phpt
===================================================================
RCS file: tests/lang/043.phpt
diff -N tests/lang/043.phpt
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ tests/lang/043.phpt 6 Mar 2007 14:43:49 -0000
@@ -0,0 +1,14 @@
+--TEST--
+Dynamic call for static methods
+--FILE--
+<?php
+class A {
+ static function foo() { return 'bar'; }
+}
+$classname = 'A';
+echo $classname::foo();
+?>
+===DONE===
+--EXPECT--
+bar
+===DONE===
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--
Best regards,
Jingcheng Zhang
Room 304, Dormitory 26 of Yuquan Campus, Zhejiang University
P.R.China
