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<?php
/*
 * This file is part of the php-code-coverage package.
 *
 * (c) Sebastian Bergmann <[e-mail]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace SebastianBergmann\CodeCoverage\Driver;

/**
 * Interface for code coverage drivers.
 */
interface Driver
{
    /**
     * @var int
     *
     * @see http://xdebug.org/docs/code_coverage
     */
    const LINE_EXECUTED = 1;

    /**
     * @var int
     *
     * @see http://xdebug.org/docs/code_coverage
     */
    const LINE_NOT_EXECUTED = -1;

    /**
     * @var int
     *
     * @see http://xdebug.org/docs/code_coverage
     */
    const LINE_NOT_EXECUTABLE = -2;

    /**
     * Start collection of code coverage information.
     *
     * @param bool $determineUnusedAndDead
     */
    public function start($determineUnusedAndDead = true);

    /**
     * Stop collection of code coverage information.
     *
     * @return array
     */
    public function stop();
}