vendor/doctrine/orm/lib/Doctrine/ORM/Query/Parser.php

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<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Query;

use Doctrine\ORM\Query;
use Doctrine\ORM\Mapping\ClassMetadata;

/**
 * An LL(*) recursive-descent parser for the context-free grammar of the Doctrine Query Language.
 * Parses a DQL query, reports any errors in it, and generates an AST.
 *
 * @since   2.0
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author  Jonathan Wage <jonwage@gmail.com>
 * @author  Roman Borschel <roman@code-factory.org>
 * @author  Janne Vanhala <jpvanhal@cc.hut.fi>
 * @author  Fabio B. Silva <fabio.bat.silva@gmail.com>
 */
class Parser
{
    /**
     * READ-ONLY: Maps BUILT-IN string function names to AST class names.
     *
     * @var array
     */
    private static $_STRING_FUNCTIONS = array(
        'concat'    => 'Doctrine\ORM\Query\AST\Functions\ConcatFunction',
        'substring' => 'Doctrine\ORM\Query\AST\Functions\SubstringFunction',
        'trim'      => 'Doctrine\ORM\Query\AST\Functions\TrimFunction',
        'lower'     => 'Doctrine\ORM\Query\AST\Functions\LowerFunction',
        'upper'     => 'Doctrine\ORM\Query\AST\Functions\UpperFunction',
        'identity'  => 'Doctrine\ORM\Query\AST\Functions\IdentityFunction',
    );

    /**
     * READ-ONLY: Maps BUILT-IN numeric function names to AST class names.
     *
     * @var array
     */
    private static $_NUMERIC_FUNCTIONS = array(
        'length'    => 'Doctrine\ORM\Query\AST\Functions\LengthFunction',
        'locate'    => 'Doctrine\ORM\Query\AST\Functions\LocateFunction',
        'abs'       => 'Doctrine\ORM\Query\AST\Functions\AbsFunction',