visibility property

RegExp visibility

Implementation

static final RegExp visibility = RegExp(r'^((?<vis>\d{4}|//\//)'
    r'(?<dir>[NSEW]([EW])?)?|'
    r'(M|P)?(?<integer>\d{1,2})?_?'
    r'(?<fraction>\d/\d)?'
    r'(?<units>SM|KM|U)|'
    r'(?<cavok>CAVOK))$');