Facebook Automatic Language Translator Java , C++ Python etc...

[eix128]

Hi , facebook released TransCoder library. https://github.com/facebookresearch/TransCoder

You can listen details https://www.youtube.com/watch?v=xTzFJIknh7E Also documents: https://ai.facebook.com/blog/deep-learning-to-translate-between-programming-languages/

Also you can check this video https://www.youtube.com/watch?v=1VHtP5FV0kM&feature=youtu.be

For optimization between Java , C++ , this library can be used. That we can convert C++ to Java directly if possible.

Maybe JavaCPP can enable this feature that translates C++ code to Java on some functions or code blocks. So we can run method without jni.

Also python is rising. Maybe you can extend this for python

[eix128]

Well at least , this can be used on constexpr expression functions

[saudet]

The main problem is that this stuff is experimental, and there are already other sort of working C/C++ -> Java translators too. You should probably check those out as well.

[eix128]

Which translator ? I dont know any good commercial tool or opensource.

[saudet]

The latest most advanced attempt in that direction is probably Sulong: https://github.com/oracle/graal/tree/master/sulong

[mingyEx]

I read its documentation , as far as I know , what it does is translate some function calls in one language to another language , instead of translating a *.cpp file to a human readable *.java file, Is my understanding correct?

[eix128]

for example on C++ to make socket connection , we should call

socket("...

function call.

On java you use new Socket(....

what it does is , it also translate system calls. Not just grammer.Its so powerful

[mingyEx]

My question is ,whether it can be used as code generation?
for example, for the following code:

class UF {
public:
  UF(int n) {
    parents_ = vector<int>(n + 1, 0);
    ranks_ = vector<int>(n + 1, 0);
    for (int i = 0; i < parents_.size(); ++i)
      parents_[i] = i;
  }
  bool Union(int u, int v) {
    int pu = Find(u);
    int pv = Find(v);
    if (pu == pv) return false;
    if (ranks_[pu] > ranks_[pv]) {
      parents_[pv] = pu;
    }
    else if (ranks_[pv] > ranks_[pu]) {
      parents_[pu] = pv;
    }
    else {
      parents_[pu] = pv;
      ++ranks_[pv];
    }
    return true;
  }
  int Find(int id) {
    if (id != parents_[id])
      parents_[id] = Find(parents_[id]);
    return parents_[id];
  }
  bool connected(int x, int y) {
    return Find(x) == Find(y);
  }
private:
  vector<int> parents_;
  vector<int> ranks_;
};

What I want is to output java source code of the form

class{
public func1(){...}
public func2(){...}
public func2(){...}
}

, can it do this? if so,How can I configure and use it?