From: ah08010-zend at yahoo dot com
Operating system: Windows 2000
PHP version: 5.0.0
PHP Bug Type: Feature/Change Request
Bug description: Type hints do not allow for extended interfaces
Description:
------------
Type hints in a derived class
that specify a function parameter
implements an interface
derived from the interface
specified in the (other) interface
implemented by the base class
(whew!)
are flagged as an error despite being type-compatible:
Fatal error: Declaration of TranslatedPlural::compose() must be compatible
with that of Translatable::compose() in ...\TranslatedMessage.php on line
83
Reproduce code:
---------------
// Parameter type hint (BASE)
interface TranslationMap
{
public function fetch($the_key);
}
// Parameter type hint (DERIVED)
interface TranslationLexicon
extends TranslationMap
{
public function plural($the_noun, $the_count);
}
// Implementation Interface
interface Translatable
{
function set_args();
function compose(TranslationMap $map);
}
// Base class
class TranslatedMessage
implements Translatable
{
public function set_args()
{
}
public function compose(TranslationMap $lex)
{
}
}
// Derived class
class TranslatedPlural
extends TranslatedMessage
{
public function compose(TranslationLexicon $lex)
{
}
}
Expected result:
----------------
I expect that the derived class, TranslatedPlural, will be checked for a
stricter (but type-compatible) interface than the base class.
Actual result:
--------------
Fatal error: Declaration of TranslatedPlural::compose() must be compatible
with that of Translatable::compose() in ...\TranslatedMessage.php on line
83
--
Edit bug report at http://bugs.php.net/?id=29417&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=29417&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=29417&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=29417&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=29417&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=29417&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=29417&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=29417&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=29417&r=support
Expected behavior: http://bugs.php.net/fix.php?id=29417&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=29417&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=29417&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=29417&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=29417&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=29417&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=29417&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=29417&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=29417&r=float
