TaskModelSetDistinct Distinctness constraints GECODE_SET_EXPORT void GECODE_SET_EXPORT void Gecode::atmostOne (Home home, const SetVarArgs &x, unsigned int c) atmostOne Home home const SetVarArgs & x unsigned int c Post propagator for $\forall 0\leq i\leq |x| : |x_i|=c$ and $\forall 0\leq i<j\leq |x| : |x_i\cap x_j|\leq 1$.