[mlpack-git] [mlpack/mlpack] Lsh table access (#663)

[Yannis Mentekidis]

I pulled the changes from upstream:master and merged with my MultiprobeLSH branch, but there seems to be a problem when compiling mlpack_lsh.

g++ says all of the LSHSearch class variables have "not been declared in this scope". Not sure what this means, did I do something wrong when recompiling or is it something in the master branch code?

Here's the g++ error messages:
```
[ 95%] Building CXX object src/mlpack/methods/lsh/CMakeFiles/mlpack_lsh.dir/lsh_main.cpp.o
In file included from /home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search.hpp:377:0,
                 from /home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_main.cpp:17:
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:819:16: error: ‘SortPolicy’ was not declared in this scope
 void LSHSearch<SortPolicy>::Serialize(Archive& ar,
                ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:819:26: error: template argument 1 is invalid
 void LSHSearch<SortPolicy>::Serialize(Archive& ar,
                          ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp: In function ‘void mlpack::neighbor::Serialize(Archive&, unsigned int)’:
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:827:9: error: ‘ownsSet’ was not declared in this scope
     if (ownsSet)
         ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:828:14: error: ‘referenceSet’ was not declared in this scope
       delete referenceSet;
              ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:829:5: error: ‘ownsSet’ was not declared in this scope
     ownsSet = true;
     ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:831:18: error: ‘referenceSet’ was not declared in this scope
   ar & CreateNVP(referenceSet, "referenceSet");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:833:18: error: ‘numProj’ was not declared in this scope
   ar & CreateNVP(numProj, "numProj");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:834:18: error: ‘numTables’ was not declared in this scope
   ar & CreateNVP(numTables, "numTables");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:838:5: error: ‘projections’ was not declared in this scope
     projections.reset();
     ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:847:5: error: ‘projections’ was not declared in this scope
     projections.set_size(tmpProj[0].n_rows, tmpProj[0].n_cols, tmpProj.size());
     ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:853:20: error: ‘projections’ was not declared in this scope
     ar & CreateNVP(projections, "projections");
                    ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:856:18: error: ‘offsets’ was not declared in this scope
   ar & CreateNVP(offsets, "offsets");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:857:18: error: ‘hashWidth’ was not declared in this scope
   ar & CreateNVP(hashWidth, "hashWidth");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:858:18: error: ‘secondHashSize’ was not declared in this scope
   ar & CreateNVP(secondHashSize, "secondHashSize");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:859:18: error: ‘secondHashWeights’ was not declared in this scope
   ar & CreateNVP(secondHashWeights, "secondHashWeights");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:860:18: error: ‘bucketSize’ was not declared in this scope
   ar & CreateNVP(bucketSize, "bucketSize");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:861:18: error: ‘secondHashTable’ was not declared in this scope
   ar & CreateNVP(secondHashTable, "secondHashTable");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:862:18: error: ‘bucketContentSize’ was not declared in this scope
   ar & CreateNVP(bucketContentSize, "bucketContentSize");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:863:18: error: ‘bucketRowInHashTable’ was not declared in this scope
   ar & CreateNVP(bucketRowInHashTable, "bucketRowInHashTable");
                  ^
/home/et3rn1ty/Projects/MLPack/mlpack/src/mlpack/methods/lsh/lsh_search_impl.hpp:864:18: error: ‘distanceEvaluations’ was not declared in this scope
   ar & CreateNVP(distanceEvaluations, "distanceEvaluations");

```

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