Function getRandomVariNumCtrlsStatesTargs

tests/utils/random.cpp:190–206

listtrio getRandomVariNumCtrlsStatesTargs(int numQubits, int minNumTargs, int maxNumTargsIncl) {
    DEMAND( minNumTargs <= maxNumTargsIncl );
    DEMAND( maxNumTargsIncl <= numQubits );

    int numTargs = getRandomInt(minNumTargs, maxNumTargsIncl+1);

    // numCtrls in [0, remainingNumQb]
    int minNumCtrls = 0;
    int maxNumCtrls = numQubits - numTargs;
    int numCtrls = getRandomInt(minNumCtrls, maxNumCtrls+1);

    // distribute qubits randomly
    auto [ctrls,targs] = getRandomFixedNumCtrlsTargs(numQubits, numCtrls, numTargs);
    vector<int> states = getRandomInts(0, 2, numCtrls);

    return tuple{ctrls,states,targs};
}