Aligning consecutive assignments in enum blocks only

Could it be possible to have an option to align assignments in enum blocks?

For instance:

enum nntp_code {
    NNTP_INFO_HELP         = 100,
    NNTP_INFO_CAPABILITIES = 101,
    NNTP_INFO_DATE         = 111,
    NNTP_OK_BANNER_POST    = 200,
    NNTP_OK_BANNER_NOPOST  = 201,
    NNTP_OK_QUIT           = 205,
    NNTP_OK_COMPRESS       = 206,
    NNTP_OK_GROUP          = 211,
    NNTP_OK_LIST           = 215,
    NNTP_OK_ARTICLE        = 220,
    NNTP_OK_HEAD           = 221,
    NNTP_OK_BODY           = 222,
}