Translation tag/macro/filter should allow returning both string|\Stringable

[ksandrj]

Version: 3.0.18

Bug Description

The Nette\Utils\Translator interface allows returning both string|\Stringable.
https://github.com/nette/utils/blob/736c567e257dbe0fcf6ce81b4d6dbe05c6899f96/src/Translator.php#L21

But the Latte's translate filter which is ultimately used when tags {translate} and {_} are compiled forces the return value of type string.

latte/src/Latte/Essential/TranslatorExtension.php

Line 53 in bd46751

'translate' => fn(Latte\Runtime\FilterInfo $fi, ...$args): string => $this->translator

This causes an error when returning results of translation as an \Nette\Utils\Html objects (related to nette/utils#231).

Possible Solution

public function getFilters(): array
{
	return [
		'translate' => fn(Latte\Runtime\FilterInfo $fi, ...$args): string|\Stringable => $this->translator
			? ($this->translator)(...$args)
			: $args[0],
	];
}