Coded BCs problem
 

inlet{
type codedFixedValue;
redirectType swirl;

code
#{
const vector axis (1,0,0);
vectorField v = 2.0*this->patch().Cf()^axis;
v.replace (vector::X, 1.0);
operator==(v);
#};
value $internalField;
}

Any one explain me, what this code means?