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<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 * (c) Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Twig;

/**
 * Represents a Token.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
final class Token
{
    private $value;
    private $type;
    private $lineno;

    const EOF_TYPE = -1;
    const TEXT_TYPE = 0;
    const BLOCK_START_TYPE = 1;
    const VAR_START_TYPE = 2;
    const BLOCK_END_TYPE = 3;
    const VAR_END_TYPE = 4;
    const NAME_TYPE = 5;
    const NUMBER_TYPE = 6;
    const STRING_TYPE = 7;
    const OPERATOR_TYPE = 8;
    const PUNCTUATION_TYPE = 9;
    const INTERPOLATION_START_TYPE = 10;
    const INTERPOLATION_END_TYPE = 11;
    const ARROW_TYPE = 12;

    /**
     * @param int    $type   The type of the token
     * @param string $value  The token value
     * @param int    $lineno The line position in the source
     */
    public function __construct($type, $value, $lineno)
    {
        $this->type = $type;
        $this->value = $value;
        $this->lineno = $lineno;
    }

    public function __toString()
    {
        return sprintf('%s(%s)', self::typeToString($this->type, true), $this->value);
    }

    /**
     * Tests the current token for a type and/or a value.
     *
     * Parameters may be:
     *  * just type
     *  * type and value (or array of possible values)
     *  * just value (or array of possible values) (NAME_TYPE is used as type)
     *
     * @param array|string|int  $type   The type to test
     * @param array|string|null $values The token value
     *
     * @return bool
     */
    public function test($type, $values = null)
    {
        if (null === $values && !\is_int($type)) {
            $values = $type;
            $type = self::NAME_TYPE;
        }

        return ($this->type === $type) && (
            null === $values ||
            (\is_array($values) && \in_array($this->value, $values)) ||
            $this->value == $values
        );
    }

    /**
     * @return int
     */
    public function getLine()
    {
        return $this->lineno;
    }

    /**
     * @return int
     */
    public function getType()
    {
        return $this->type;
    }

    /**
     * @return string
     */
    public function getValue()
    {
        return $this->value;
    }

    /**
     * Returns the constant representation (internal) of a given type.
     *
     * @param int  $type  The type as an integer
     * @param bool $short Whether to return a short representation or not
     *
     * @return string The string representation
     */
    public static function typeToString($type, $short = false)
    {
        switch ($type) {
            case self::EOF_TYPE:
                $name = 'EOF_TYPE';
                break;
            case self::TEXT_TYPE:
                $name = 'TEXT_TYPE';
                break;
            case self::BLOCK_START_TYPE:
                $name = 'BLOCK_START_TYPE';
                break;
            case self::VAR_START_TYPE:
                $name = 'VAR_START_TYPE';
                break;
            case self::BLOCK_END_TYPE:
                $name = 'BLOCK_END_TYPE';
                break;
            case self::VAR_END_TYPE:
                $name = 'VAR_END_TYPE';
                break;
            case self::NAME_TYPE:
                $name = 'NAME_TYPE';
                break;
            case self::NUMBER_TYPE:
                $name = 'NUMBER_TYPE';
                break;
            case self::STRING_TYPE:
                $name = 'STRING_TYPE';
                break;
            case self::OPERATOR_TYPE:
                $name = 'OPERATOR_TYPE';
                break;
            case self::PUNCTUATION_TYPE:
                $name = 'PUNCTUATION_TYPE';
                break;
            case self::INTERPOLATION_START_TYPE:
                $name = 'INTERPOLATION_START_TYPE';
                break;
            case self::INTERPOLATION_END_TYPE:
                $name = 'INTERPOLATION_END_TYPE';
                break;
            case self::ARROW_TYPE:
                $name = 'ARROW_TYPE';
                break;
            default:
                throw new \LogicException(sprintf('Token of type "%s" does not exist.', $type));
        }

        return $short ? $name : 'Twig\Token::'.$name;
    }

    /**
     * Returns the English representation of a given type.
     *
     * @param int $type The type as an integer
     *
     * @return string The string representation
     */
    public static function typeToEnglish($type)
    {
        switch ($type) {
            case self::EOF_TYPE:
                return 'end of template';
            case self::TEXT_TYPE:
                return 'text';
            case self::BLOCK_START_TYPE:
                return 'begin of statement block';
            case self::VAR_START_TYPE:
                return 'begin of print statement';
            case self::BLOCK_END_TYPE:
                return 'end of statement block';
            case self::VAR_END_TYPE:
                return 'end of print statement';
            case self::NAME_TYPE:
                return 'name';
            case self::NUMBER_TYPE:
                return 'number';
            case self::STRING_TYPE:
                return 'string';
            case self::OPERATOR_TYPE:
                return 'operator';
            case self::PUNCTUATION_TYPE:
                return 'punctuation';
            case self::INTERPOLATION_START_TYPE:
                return 'begin of string interpolation';
            case self::INTERPOLATION_END_TYPE:
                return 'end of string interpolation';
            case self::ARROW_TYPE:
                return 'arrow function';
            default:
                throw new \LogicException(sprintf('Token of type "%s" does not exist.', $type));
        }
    }
}

class_alias('Twig\Token', 'Twig_Token');