Method is_number_start

crates/css_lexer/src/private.rs:766–781

(&self)

	}

	fn is_number_start(&self) -> bool {
		let remaining = self.remaining_bytes();
		if remaining.is_empty() {
			return false;
		}
		let first = remaining[0];
		if first.is_ascii_digit() {
			return true;
		}
		if (first == b'+' || first == b'-') && remaining.len() >= 2 {
			let second = remaining[1];
			return second.is_ascii_digit()
				|| (second == b'.' && remaining.len() >= 3 && remaining[2].is_ascii_digit());
		}
		first == b'.' && remaining.len() >= 2 && remaining[1].is_ascii_digit()
	}

	fn would_start_unicode_range(&self) -> bool {
		// Caller confirmed current byte is U or u. Check next two.