How to force std::vector type for fixed-length arrays in msg?

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Hi,

According to this page http://wiki.ros.org/msg fixed-length arrays in msg files can be interpreted as boost::array or std::vector.

Whenever I tried to apply any vector logic to a message with a fixed-length array (let's say uint8[8]) it would throw errors saying that the type is of boost::array.

How can I enforce std::vector type on fixed-sized fields inside ROS messages?

EDIT: here's an example: http://docs.ros.org/api/can_msgs/html/msg/Frame.html, I would like to have data field as std::vector without changing the field itself to uint8[].