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1 // PR c++/44778
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2
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3 enum Healpix_Ordering_Scheme { RING, NEST };
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4
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5 class Healpix_Base
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6 {
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7 protected:
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8 Healpix_Ordering_Scheme scheme_;
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9 int nest2ring (int pix) const;
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10 int ring2nest (int pix) const;
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11
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12 typedef int (Healpix_Base::*swapfunc)(int pix) const;
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13 };
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14
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15 template<typename T> class Healpix_Map: public Healpix_Base
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16 {
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17 public:
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18 void Import_nograde (const Healpix_Map<T> &orig)
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19 {
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20 swapfunc swapper = (scheme_ == NEST) ?
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21 &Healpix_Map::ring2nest : &Healpix_Map::nest2ring;
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22 }
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23 };
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24
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25 int main()
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26 {
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27 Healpix_Map<double> a,b;
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28 a.Import_nograde(b);
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29 }
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