Function dispatch

test/TestUtils.cpp:32–38

#endif

void dispatch(std::function<void(MNNForwardType)> payload) {
    for (int i = 0; i < MNN_FORWARD_ALL; i++) {
        MNNForwardType type = (MNNForwardType)i;
        if (MNNGetExtraRuntimeCreator(type))
            dispatch(payload, type);
    }
}

void dispatch(std::function<void(MNNForwardType)> payload, MNNForwardType backend) {
    switch (backend) {