b2pweb / bdf-form

src/Leaf/IntegerElement.php

<?php

namespace Bdf\Form\Leaf;

use TypeError;

/**
 * Element for an integer
 *
 * @see IntegerElementBuilder for build the element
 *
 * @extends LeafElement<int>
 */
class IntegerElement extends LeafElement
{
    /**
     * {@inheritdoc}
     *
     * @return int|null
     */
    protected function toPhp($httpValue): ?int
    {
        return $httpValue === null || $httpValue === '' ? null : (int) $httpValue;

The expression return $httpValue === null || $httpValue === '' ? null : (int)$httpValue also could return the type integer which is incompatible with the return type mandated by Bdf\Form\Leaf\LeafElement::toPhp() of Bdf\Form\Leaf\T|null.

    }

    /**
     * {@inheritdoc}
     */
    protected function toHttp($phpValue): ?string
    {
        return $phpValue === null ? null : (string) $phpValue;
    }

    /**
     * {@inheritdoc}
     *
     * @return int|null
     */
    protected function tryCast($value): ?int
    {
        if ($value === null) {
            return null;
        }

        if (!is_numeric($value)) {
            throw new TypeError('The import()\'ed value of a '.static::class.' must be numeric or null');
        }

        return (int) $value;
    }
}