Method get_pidx

pointersect/pr/cpp/pr.cpp:46–54

get the pointer to the point index set

    // get the pointer to the point index set
    std::unordered_set<int64_t> * get_pidx(int64_t gidx) {
        auto iter = table.find(gidx);
        if (iter == table.end()) {
            return nullptr;
        }
        else {
            return &(table[gidx]);
        }
    }

    // get the underlying table
    Table get_table() {