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<?php

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 $attributes Additional attributes
     */
    public function __construct($value, array $attributes = array()) {
        parent::__construct($attributes);
        $this->value = $value;
    }

public function getSubNodeNames() {
        return array('value');
    }

/**
     * @internal
     *
     * Parses a DNUMBER token like PHP would.
     *
     * @param string $str A string number
     *
     * @return float The parsed number
     */
    public static function parse($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;
    }
}