Function invokeApiOperation

tests/unit/operations.cpp:363–395

template <NumQubitsFlag Ctrls, NumQubitsFlag Targs>
void invokeApiOperation(
    auto operation, Qureg qureg, 
    vector<int> ctrls, vector<int> states, int numCtrls, 
    vector<int> targs, int numTargs, 
    auto&... args
) {
    assertNumQubitsFlagsValid(Ctrls, Targs, ctrls, states, targs);

    if constexpr (Ctrls == zero) {
        if constexpr (Targs == zero) operation(qureg, args...);
        if constexpr (Targs == one)  operation(qureg, targs[0], args...);
        if constexpr (Targs == two)  operation(qureg, targs[0], targs[1], args...);
        if constexpr (Targs == any)  operation(qureg, targs.data(), numTargs, args...);
    }
    if constexpr (Ctrls == one) {
        if constexpr (Targs == zero) operation(qureg, ctrls[0], args...);
        if constexpr (Targs == one)  operation(qureg, ctrls[0], targs[0], args...);
        if constexpr (Targs == two)  operation(qureg, ctrls[0], targs[0], targs[1], args...);
        if constexpr (Targs == any)  operation(qureg, ctrls[0], targs.data(), numTargs, args...);
    }
    if constexpr (Ctrls == any) {
        if constexpr (Targs == zero) operation(qureg, ctrls.data(), numCtrls, args...);
        if constexpr (Targs == one)  operation(qureg, ctrls.data(), numCtrls, targs[0], args...);
        if constexpr (Targs == two)  operation(qureg, ctrls.data(), numCtrls, targs[0], targs[1], args...);
        if constexpr (Targs == any)  operation(qureg, ctrls.data(), numCtrls, targs.data(), numTargs, args...);
    }
    if constexpr (Ctrls == anystates) {
        if constexpr (Targs == zero) operation(qureg, ctrls.data(), states.data(), numCtrls, args...);
        if constexpr (Targs == one)  operation(qureg, ctrls.data(), states.data(), numCtrls, targs[0], args...);
        if constexpr (Targs == two)  operation(qureg, ctrls.data(), states.data(), numCtrls, targs[0], targs[1], args...);
        if constexpr (Targs == any)  operation(qureg, ctrls.data(), states.data(), numCtrls, targs.data(), numTargs, args...);
    }
}

// overload to avoid passing numCtrls and numTargs