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[2009-01-07 19:03 UTC] jpetso at gmx dot at
Description: ------------ Regarding the DualIterator example, current version: http://cvs.php.net/viewvc.cgi/php- In its API documentation, the key() method claims to use the DualIterator::KEY_* constants, but the code makes use of CURRENT_* instead. Also, does the *_ARRAY option (which is used by default even for key()) does not make a lot of sense because arrays cannot be used as keys at least for foreach loops. (Might work with low-level iterator usage, but then again keys should probably be *real* keys in any case.) It would be nice to have these issues fixed (diff attached further down). Related feature request, totally not in scope for this bug report (sorry): it might be worthwhile to extend the flags to {CURRENT,KEY}_{LHS,RHS}_{KEY,VALUE} in order to make it possible to e.g. use the left hand side's current value as key for the iterator. At least, that's what I'm going to use my derived class for. Thanks for having a look (and for your work on PHP), regards, Jakob Reproduce code: --------------- $leftSideArray = array('lhs_key' => 'lhs_value'); $rightSideArray = array('rhs_key' => 'rhs_value'); $combined = new DualIterator( new ArrayIterator($leftSideArray), new ArrayIterator($rightSideArray), DualIterator::KEY_LHS | DualIterator::CURRENT_RHS ); foreach ($combined as $key => $value) { var_dump($key); var_dump($value); } Expected result: ---------------- string(7) "lhs_key" string(9) "rhs_value" Actual result: -------------- Warning: Illegal type returned from DualIterator::key() in /home/jakob/dev/www/drupal/6/transformations/sites/all/modules/tf_modu line 223 Call Stack: 0.0014 112544 1. {main}() /home/jakob/dev/www/drupal/6/transformations/sites/all/modules/tf_modu int(0) string(9) "rhs_value" PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Mon Mar 10 21:01:30 2025 UTC |
The diff to fix the bug. --- dualiterator.1.4.inc 2009-01-07 19:47:18.000000000 +0100 +++ dualiterator.fixed.inc 2009-01-07 20:01:31.000000000 +0100 @@ -23,10 +23,9 @@ class DualIterator implements Iterator const KEY_LHS = 0x10; const KEY_RHS = 0x20; - const KEY_ARRAY = 0x30; const KEY_0 = 0x00; - const DEFAULT_FLAGS = 0x33; + const DEFAULT_FLAGS = 0x13; private $lhs; private $rhs; @@ -114,13 +113,11 @@ class DualIterator implements Iterator switch($this->flags & 0xF0) { default: - case self::CURRENT_ARRAY: - return array($this->lhs->key(), $this->rhs- - case self::CURRENT_LHS: + case self::KEY_LHS: return $this->lhs->key(); - case self::CURRENT_RHS: + case self::KEY_RHS: return $this->rhs->key(); - case self::CURRENT_0: + case self::KEY_0: return NULL; } }Oops, forgot to change the default flags for the constructor, and to fix up the method docs as well. Here's the improved patch. --- dualiterator.1.4.inc 2009-01-07 19:47:18.000000000 +0100 +++ dualiterator.fixed.inc 2009-01-07 20:12:59.000000000 +0100 @@ -23,10 +23,9 @@ class DualIterator implements Iterator const KEY_LHS = 0x10; const KEY_RHS = 0x20; - const KEY_ARRAY = 0x30; const KEY_0 = 0x00; - const DEFAULT_FLAGS = 0x33; + const DEFAULT_FLAGS = 0x13; private $lhs; private $rhs; @@ -38,8 +37,8 @@ class DualIterator implements Iterator * @param rhs Right Hand Side Iterator * @param flags iteration flags */ - function __construct(Iterator $lhs, Iterator $rhs, - $flags = 0x33 /*DualIterator::DEFAULT_FLAGS*/) + function __construct(Iterator $lhs, Iterator $rhs, + $flags = 0x13 /*DualIterator::DEFAULT_FLAGS*/) { $this->lhs = $lhs; $this->rhs = $rhs; @@ -107,20 +106,18 @@ class DualIterator implements Iterator } } - /** @return current value depending on KEY_* flags + /** @return key value depending on KEY_* flags */ function key() { switch($this->flags & 0xF0) { default: - case self::CURRENT_ARRAY: - return array($this->lhs->key(), $this->rhs- - case self::CURRENT_LHS: + case self::KEY_LHS: return $this->lhs->key(); - case self::CURRENT_RHS: + case self::KEY_RHS: return $this->rhs->key(); - case self::CURRENT_0: + case self::KEY_0: return NULL; } }