Moses-support Digest, Vol 94, Issue 18

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Today's Topics:

1. Add a new LM feature in Moses (HOANG Cong Duy Vu)


----------------------------------------------------------------------

Message: 1
Date: Fri, 15 Aug 2014 10:43:42 +0800
From: HOANG Cong Duy Vu <duyvuleo@gmail.com>
Subject: [Moses-support] Add a new LM feature in Moses
To: moses-support@mit.edu
Message-ID:
<CAPRaJX2nZ-0wRJq9d=tj8MQ-RfksULLyvu1FNDp0YCrBbRp3yQ@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi,

I would like to add a new simple LM named HybLanguageModelKen (HybKen.h and
HybKen.cpp) which will inherit from LanguageModelKen.

In Factory.cpp, I added as follows:

...
//#include "moses/LM/Ken.h"
#include "moses/LM/HybKen.h"
...

class KenFactory : public FeatureFactory
{
public:
void Create(const std::string &line) {
DefaultSetup(ConstructKenLM(line));
}
};

class HybKenFactory : public FeatureFactory
{
public:
void Create(const std::string &line) {
DefaultSetup(ConstructHybKenLM(line));
}
};

...
Add("KENLM", new KenFactory());

Add("HKENLM", new HybKenFactory());

...

I've created HybKen.h as follows:

#ifndef moses_LanguageModelHybKen_h
#define moses_LanguageModelHybKen_h

//#include <string>
//#include <boost/shared_ptr.hpp>

//#include "lm/word_index.hh"

//#include "moses/LM/Base.h"
//#include "moses/Hypothesis.h"
//#include "moses/TypeDef.h"
//#include "moses/Word.h"

#include "moses/LM/Ken.h"
namespace Moses
{

LanguageModel *ConstructHybKenLM(const std::string &line);

//! This will also load. Returns a templated KenLM class
LanguageModel *ConstructHybKenLM(const std::string &line, const std::string
&file, const std::string &fileM, FactorType factorType, bool lazy);

void LoadMapping(const std::string &f, std::map<std::string, std::string>&
m);

/*
* An implementation of single factor LM using Kenneth's code.
*/
template <class Model> class LanguageModelHybKen : public
LanguageModelKen<Model>
{
...

Factory.cpp, HybKen.h and HybKen.cpp are attached for your reference.

But I always got the compilation error message: "*moses/FF/Factory.cpp:166:
error: undefined reference to 'Moses::ConstructHybKenLM(std::string const&)*
'".
I understand that Moses::ConstructHybKenLM(std::string const&) is already
defined in Moses namespace.

May I ask for your help?

Thank you!

--
Cheers,
Vu
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