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<?php
/**
* This file is part of the CodeAnalysis addon for PHP_CodeSniffer.
*
* PHP version 5
*
* @category PHP
* @package PHP_CodeSniffer
* @author Greg Sherwood <gsherwood@squiz.net>
* @author Manuel Pichler <mapi@manuel-pichler.de>
* @copyright 2007-2008 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version CVS: $Id: EmptyStatementSniff.php,v 1.1 2008/02/06 02:38:36 squiz Exp $
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
/**
* This sniff class detected empty statement.
*
* This sniff implements the common algorithm for empty statement body detection.
* A body is considered as empty if it is completely empty or it only contains
* whitespace characters and|or comments.
*
* <code>
* stmt {
* // foo
* }
* stmt (conditions) {
* // foo
* }
* </code>
*
* Statements covered by this sniff are <b>catch</b>, <b>do</b>, <b>else</b>,
* <b>elsif</b>, <b>for</b>, <b>foreach<b>, <b>if</b>, <b>switch</b>, <b>try</b>
* and <b>while</b>.
*
* @category PHP
* @package PHP_CodeSniffer
* @author Manuel Pichler <mapi@manuel-pichler.de>
* @copyright 2007-2008 Manuel Pichler. All rights reserved.
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: 1.1.0
* @link http://pear.php.net/package/PHP_CodeSniffer
*/
class Toba_Sniffs_CodeAnalysis_EmptyStatementSniff implements PHP_CodeSniffer_Sniff
{
/**
* List of block tokens that this sniff covers.
*
* The key of this hash identifies the required token while the boolean
* value says mark an error or mark a warning.
*
* @type array<boolean>
* @var array(integer=>boolean) $_tokens
*/
private $_tokens = array(
T_CATCH => true,
T_DO => false,
T_ELSE => false,
T_ELSEIF => false,
T_FOR => false,
T_FOREACH => false,
T_IF => false,
T_SWITCH => false,
T_TRY => false,
T_WHILE => false,
);
/**
* Registers the tokens that this sniff wants to listen for.
*
* @return array(integer)
*/
public function register()
{
return array_keys($this->_tokens);
}//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();
$token = $tokens[$stackPtr];
// Skip for-statements without body.
if (isset($token['scope_opener']) === false) {
return;
}
$next = ++$token['scope_opener'];
$end = --$token['scope_closer'];
$emptyBody = true;
for (; $next <= $end; ++$next) {
if (in_array($tokens[$next]['code'], PHP_CodeSniffer_Tokens::$emptyTokens) === false) {
$emptyBody = false;
break;
}
}
if ($emptyBody === true) {
// Get token identifier.
$name = $phpcsFile->getTokensAsString($stackPtr, 1);
$error = sprintf('Empty %s statement detected', strtoupper($name));
if ($this->_tokens[$token['code']] === true) {
$phpcsFile->addError($error, $stackPtr);
} else {
$phpcsFile->addWarning($error, $stackPtr);
}
}
}//end process()
}//end class
?>
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