TaskModelSetPrecede Value precedence constraints over set variables GECODE_SET_EXPORT void GECODE_SET_EXPORT void Gecode::precede (Home home, const SetVarArgs &x, int s, int t) precede Home home const SetVarArgs & x int s int t Post propagator that s precedes t in x. This constraint enforces that if there exists $j$ such that $s\notin x_j\land t\in x_j$, then there exists $i<j$ such that $s\in x_i\land t\notin x_i$. GECODE_SET_EXPORT void GECODE_SET_EXPORT void Gecode::precede (Home home, const SetVarArgs &x, const IntArgs &c) precede Home home const SetVarArgs & x const IntArgs & c Post propagator that successive values in c precede each other in x.