Method ReadUtf8If

src/core/string_consumer.hpp:501–507

* Check whether the next UTF-8 char matches 'c', and skip it. */

	 * Check whether the next UTF-8 char matches 'c', and skip it.
	 */
	[[nodiscard]] bool ReadUtf8If(char32_t c)
	{
		auto [len, result] = this->PeekUtf8();
		if (len == 0 || result != c) return false;
		this->Skip(len);
		return true;
	}
	/**
	 * If the next data matches the UTF-8 char 'c', then skip it.
	 */