<?php
/**
 * Squiz_Sniffs_Objects_ObjectInstantiationSniff.
 *
 * PHP version 5
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @author    Marc McIntyre <mmcintyre@squiz.net>
 * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */

/**
 * Squiz_Sniffs_Objects_ObjectInstantiationSniff.
 *
 * Ensures objects are assigned to a variable when instantiated.
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @author    Marc McIntyre <mmcintyre@squiz.net>
 * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 * @version   Release: @package_version@
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */
class Squiz_Sniffs_Objects_ObjectInstantiationSniff implements PHP_CodeSniffer_Sniff
{


    /**
     * Registers the token types that this sniff wishes to listen to.
     *
     * @return array
     */
    public function register()
    {
        return array(T_NEW);

    }//end register()


    /**
     * Process the tokens that this sniff is listening for.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file where the token was found.
     * @param int                  $stackPtr  The position in the stack where
     *                                        the token was found.
     *
     * @return void
     */
    public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        $allowedTokens   = PHP_CodeSniffer_Tokens::$emptyTokens;
        $allowedTokens[] = T_BITWISE_AND;

        $prev = $phpcsFile->findPrevious($allowedTokens, ($stackPtr - 1), null, true);

        $allowedTokens = array(
                          T_EQUAL        => true,
                          T_DOUBLE_ARROW => true,
                          T_THROW        => true,
                          T_RETURN       => true,
                          T_INLINE_THEN  => true,
                          T_INLINE_ELSE  => true,
                         );

        if (isset($allowedTokens[$tokens[$prev]['code']]) === false) {
            $error = 'New objects must be assigned to a variable';
            $phpcsFile->addError($error, $stackPtr, 'NotAssigned');
        }

    }//end process()


}//end class