johannes Wed Nov 21 00:03:16 2007 UTC
Added files: (Branch: PHP_5_3)
/ZendEngine2/tests 021.phpt
Modified files:
/ZendEngine2 zend_language_parser.y
Log:
- MFH ?: operator (Marcus)
[DOC] "expr1 ?: expr1" is a shortcut for: "expr1 ? expr1 : expr2" as
exists in gcc and discussed some time back. Note that this is not
an implementation ifsetor($var, default). While ifsetor would not
generate any message for non existing variables or array indices
the ternary shortcut does. Also the ternary shortcut does a boolean
evaluation rather then checking for isset(). That way ther ternary
shortcut can work on any expression while ifsetor can only work on
variables. Also to be silent one has do do: "@$expr1 ?: $expr2".
http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_language_parser.y?r1=1.160.2.4.2.8.2.8&r2=1.160.2.4.2.8.2.9&diff_format=u
Index: ZendEngine2/zend_language_parser.y
diff -u ZendEngine2/zend_language_parser.y:1.160.2.4.2.8.2.8
ZendEngine2/zend_language_parser.y:1.160.2.4.2.8.2.9
--- ZendEngine2/zend_language_parser.y:1.160.2.4.2.8.2.8 Tue Nov 20
08:53:02 2007
+++ ZendEngine2/zend_language_parser.y Wed Nov 21 00:03:16 2007
@@ -18,7 +18,7 @@
+----------------------------------------------------------------------+
*/
-/* $Id: zend_language_parser.y,v 1.160.2.4.2.8.2.8 2007/11/20 08:53:02 dmitry
Exp $ */
+/* $Id: zend_language_parser.y,v 1.160.2.4.2.8.2.9 2007/11/21 00:03:16
johannes Exp $ */
/*
* LALR shift/reduce conflicts and how they are resolved:
@@ -611,6 +611,9 @@
| expr '?' { zend_do_begin_qm_op(&$1, &$2 TSRMLS_CC); }
expr ':' { zend_do_qm_true(&$4, &$2, &$5 TSRMLS_CC); }
expr { zend_do_qm_false(&$$, &$7, &$2, &$5 TSRMLS_CC); }
+ | expr '?' { zend_do_begin_qm_op(&$1, &$2 TSRMLS_CC); }
+ ':' { zend_do_qm_true(&$1, &$2, &$4 TSRMLS_CC); }
+ expr { zend_do_qm_false(&$$, &$6, &$2, &$4 TSRMLS_CC); }
| internal_functions_in_yacc { $$ = $1; }
| T_INT_CAST expr { zend_do_cast(&$$, &$2, IS_LONG
TSRMLS_CC); }
| T_DOUBLE_CAST expr { zend_do_cast(&$$, &$2, IS_DOUBLE
TSRMLS_CC); }
http://cvs.php.net/viewvc.cgi/ZendEngine2/tests/021.phpt?view=markup&rev=1.1
Index: ZendEngine2/tests/021.phpt
+++ ZendEngine2/tests/021.phpt
--TEST--
?: operator
--FILE--
<?php
var_dump(true ?: false);
var_dump(false ?: true);
var_dump(23 ?: 42);
var_dump(0 ?: "bar");
$a = 23;
$b = 0;
$c = "";
$d = 23.5;
var_dump($a ?: $b);
var_dump($c ?: $d);
var_dump(1 ?: print(2));
?>
--EXPECT--
bool(true)
bool(true)
int(23)
string(3) "bar"
int(23)
float(23.5)
int(1)
--UEXPECT--
bool(true)
bool(true)
int(23)
unicode(3) "bar"
int(23)
float(23.5)
int(1)
