Gettext_Translations::parenthesize_plural_exression( string $expression ): string

344		public function parenthesize_plural_exression( $expression ) {345			$expression .= ';';346			$res         = '';347			$depth       = 0;348			for ( $i = 0; $i < strlen( $expression ); ++$i ) {349				$char = $expression[ $i ];350				switch ( $char ) {351					case '?':352						$res .= ' ? (';353						++$depth;354						break;355					case ':':356						$res .= ') : (';357						break;358					case ';':359						$res  .= str_repeat( ')', $depth ) . ';';360						$depth = 0;361						break;362					default:363						$res .= $char;364				}365			}366			return rtrim( $res, ';' );367		}