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<?php
/**
* Ensures this is not assigned to any other var but self.
*
* PHP version 5
*
* @category PHP
* @package PHP_CodeSniffer_MySource
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
/**
* Ensures this is not assigned to any other var but self.
*
* @category PHP
* @package PHP_CodeSniffer_MySource
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
* @license http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
* @version Release: 1.3.3
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
class MySource_Sniffs_Objects_AssignThisSniff implements PHP_CodeSniffer_Sniff
{
/**
* A list of tokenizers this sniff supports.
*
* @var array
*/
public $supportedTokenizers = array('JS');
/**
* Returns an array of tokens this test wants to listen for.
*
* @return array
*/
public function register()
{
return array(T_THIS);
}//end register()
/**
* Processes this test, when one of its tokens is encountered.
*
* @param PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the current token
* in the stack passed in $tokens.
*
* @return void
*/
public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
{
$tokens = $phpcsFile->getTokens();
// Ignore this.something and other uses of "this" that are not
// direct assignments.
$next = $phpcsFile->findNext(T_WHITESPACE, ($stackPtr + 1), null, true);
if ($tokens[$next]['code'] !== T_SEMICOLON) {
if ($tokens[$next]['line'] === $tokens[$stackPtr]['line']) {
return;
}
}
// Something must be assigned to "this".
$prev = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
if ($tokens[$prev]['code'] !== T_EQUAL) {
return;
}
// A variable needs to be assigned to "this".
$prev = $phpcsFile->findPrevious(T_WHITESPACE, ($prev - 1), null, true);
if ($tokens[$prev]['code'] !== T_STRING) {
return;
}
// We can only assign "this" to a var called "self".
if ($tokens[$prev]['content'] !== 'self' && $tokens[$prev]['content'] !== '_self') {
$error = 'Keyword "this" can only be assigned to a variable called "self" or "_self"';
$phpcsFile->addError($error, $prev, 'NotSelf');
}
}//end process()
}//end class
?>
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