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aurelien |
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<?php
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/**
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* This file is part of the CodeAnalysis addon for PHP_CodeSniffer.
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*
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* PHP version 5
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*
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* @category PHP
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* @package PHP_CodeSniffer
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* @author Greg Sherwood <gsherwood@squiz.net>
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* @author Manuel Pichler <mapi@manuel-pichler.de>
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* @copyright 2007-2008 Manuel Pichler. All rights reserved.
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @version CVS: $Id: EmptyStatementSniff.php,v 1.1 2008/02/06 02:38:36 squiz Exp $
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* @link http://pear.php.net/package/PHP_CodeSniffer
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*/
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/**
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* This sniff class detected empty statement.
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*
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* This sniff implements the common algorithm for empty statement body detection.
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* A body is considered as empty if it is completely empty or it only contains
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* whitespace characters and|or comments.
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*
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* <code>
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* stmt {
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* // foo
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* }
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* stmt (conditions) {
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* // foo
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* }
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* </code>
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*
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* Statements covered by this sniff are <b>catch</b>, <b>do</b>, <b>else</b>,
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* <b>elsif</b>, <b>for</b>, <b>foreach<b>, <b>if</b>, <b>switch</b>, <b>try</b>
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* and <b>while</b>.
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*
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* @category PHP
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* @package PHP_CodeSniffer
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* @author Manuel Pichler <mapi@manuel-pichler.de>
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* @copyright 2007-2008 Manuel Pichler. All rights reserved.
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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* @version Release: 1.2.0RC1
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* @link http://pear.php.net/package/PHP_CodeSniffer
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*/
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class Generic_Sniffs_CodeAnalysis_EmptyStatementSniff implements PHP_CodeSniffer_Sniff
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{
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/**
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* List of block tokens that this sniff covers.
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*
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* The key of this hash identifies the required token while the boolean
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* value says mark an error or mark a warning.
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*
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* @type array<boolean>
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* @var array(integer=>boolean) $_tokens
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*/
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private $_tokens = array(
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T_CATCH => true,
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T_DO => false,
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T_ELSE => false,
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T_ELSEIF => false,
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T_FOR => false,
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T_FOREACH => false,
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T_IF => false,
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T_SWITCH => false,
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T_TRY => false,
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T_WHILE => false,
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);
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/**
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* Registers the tokens that this sniff wants to listen for.
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*
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* @return array(integer)
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*/
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public function register()
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{
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return array_keys($this->_tokens);
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}//end register()
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/**
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* Processes this test, when one of its tokens is encountered.
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*
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* @param PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token
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* in the stack passed in $tokens.
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*
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* @return void
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*/
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public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
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{
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$tokens = $phpcsFile->getTokens();
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$token = $tokens[$stackPtr];
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// Skip for-statements without body.
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if (isset($token['scope_opener']) === false) {
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return;
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}
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$next = ++$token['scope_opener'];
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$end = --$token['scope_closer'];
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$emptyBody = true;
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for (; $next <= $end; ++$next) {
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if (in_array($tokens[$next]['code'], PHP_CodeSniffer_Tokens::$emptyTokens) === false) {
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$emptyBody = false;
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break;
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}
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}
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if ($emptyBody === true) {
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// Get token identifier.
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$name = $phpcsFile->getTokensAsString($stackPtr, 1);
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$error = sprintf('Empty %s statement detected', strtoupper($name));
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if ($this->_tokens[$token['code']] === true) {
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$phpcsFile->addError($error, $stackPtr);
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} else {
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$phpcsFile->addWarning($error, $stackPtr);
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}
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}
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}//end process()
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}//end class
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?>
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