<?php declare(strict_types=1);



namespace PhpParser\Node\Scalar;



use PhpParser\Node\Scalar;



class DNumber extends Scalar

{

    /** @var float Number value */

    public $value;



    /**

     * Constructs a float number scalar node.

     *

     * @param float $value      Value of the number

     * @param array $attributes Additional attributes

     */

    public function __construct(float $value, array $attributes = []) {

        $this->attributes = $attributes;

        $this->value = $value;

    }



    public function getSubNodeNames() : array {

        return ['value'];

    }



    /**

     * @param mixed[] $attributes

     */

    public static function fromString(string $str, array $attributes = []): DNumber

    {

        $attributes['rawValue'] = $str;

        $float = self::parse($str);



        return new DNumber($float, $attributes);

    }



    /**

     * @internal

     *

     * Parses a DNUMBER token like PHP would.

     *

     * @param string $str A string number

     *

     * @return float The parsed number

     */

    public static function parse(string $str) : float {

        $str = str_replace('_', '', $str);



        // if string contains any of .eE just cast it to float

        if (false !== strpbrk($str, '.eE')) {

            return (float) $str;

        }



        // otherwise it's an integer notation that overflowed into a float

        // if it starts with 0 it's one of the special integer notations

        if ('0' === $str[0]) {

            // hex

            if ('x' === $str[1] || 'X' === $str[1]) {

                return hexdec($str);

            }



            // bin

            if ('b' === $str[1] || 'B' === $str[1]) {

                return bindec($str);

            }



            // oct

            // substr($str, 0, strcspn($str, '89')) cuts the string at the first invalid digit (8 or 9)

            // so that only the digits before that are used

            return octdec(substr($str, 0, strcspn($str, '89')));

        }



        // dec

        return (float) $str;

    }



    public function getType() : string {

        return 'Scalar_DNumber';

    }

}

