<?php
/**
* Represents a PHP_CodeSniffer sniff for sniffing coding standards.
*
* A sniff registers what token types it wishes to listen for, then, when
* PHP_CodeSniffer encounters that token, the sniff is invoked and passed
* information about where the token was found in the stack, and the
* PHP_CodeSniffer file in which the token was found.
*
* @author Greg Sherwood <gsherwood@squiz.net>
* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
* @license https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
*/
namespace PHP_CodeSniffer\Sniffs;
use PHP_CodeSniffer\Files\File;
interface Sniff
{
/**
* Registers the tokens that this sniff wants to listen for.
*
* An example return value for a sniff that wants to listen for whitespace
* and any comments would be:
*
* <code>
* return array(
* T_WHITESPACE,
* T_DOC_COMMENT,
* T_COMMENT,
* );
* </code>
*
* @return mixed[]
* @see Tokens.php
*/
public function register();
/**
* Called when one of the token types that this sniff is listening for
* is found.
*
* The stackPtr variable indicates where in the stack the token was found.
* A sniff can acquire information this token, along with all the other
* tokens within the stack by first acquiring the token stack:
*
* <code>
* $tokens = $phpcsFile->getTokens();
* echo 'Encountered a '.$tokens[$stackPtr]['type'].' token';
* echo 'token information: ';
* print_r($tokens[$stackPtr]);
* </code>
*
* If the sniff discovers an anomaly in the code, they can raise an error
* by calling addError() on the \PHP_CodeSniffer\Files\File object, specifying an error
* message and the position of the offending token:
*
* <code>
* $phpcsFile->addError('Encountered an error', $stackPtr);
* </code>
*
* @param \PHP_CodeSniffer\Files\File $phpcsFile The PHP_CodeSniffer file where the
* token was found.
* @param int $stackPtr The position in the PHP_CodeSniffer
* file's token stack where the token
* was found.
*
* @return void|int Optionally returns a stack pointer. The sniff will not be
* called again on the current file until the returned stack
* pointer is reached. Return (count($tokens) + 1) to skip
* the rest of the file.
*/
public function process(File $phpcsFile, $stackPtr);
}//end interface