public static function extract_assoc( $arguments ) {
		$positional_args = array();
		$assoc_args      = array();
		$global_assoc    = array();
		$local_assoc     = array();

		foreach ( $arguments as $arg ) {
			$positional_arg = null;
			$assoc_arg      = null;

			if ( preg_match( '|^--no-([^=]+)$|', $arg, $matches ) ) {
				$assoc_arg = array( $matches[1], false );
			} elseif ( preg_match( '|^--([^=]+)$|', $arg, $matches ) ) {
				$assoc_arg = array( $matches[1], true );
			} elseif ( preg_match( '|^--([^=]+)=(.*)|s', $arg, $matches ) ) {
				$assoc_arg = array( $matches[1], $matches[2] );
			} else {
				$positional = $arg;
			}

			if ( ! is_null( $assoc_arg ) ) {
				$assoc_args[] = $assoc_arg;
				if ( count( $positional_args ) ) {
					$local_assoc[] = $assoc_arg;
				} else {
					$global_assoc[] = $assoc_arg;
				}
			} elseif ( ! is_null( $positional ) ) {
				$positional_args[] = $positional;
			}
		}

		return array( $positional_args, $assoc_args, $global_assoc, $local_assoc );
	}