Btukfyl

I searched a lot about this error, but I couldn't find any solution for my specific problem.
I have a project which is working fine when I build or run it in VS 2017. But when I start including one of the files of the project in my google test project, by building my google test project I get this error:

Error LNK2019 unresolved external symbol
"public: __thiscall Classfilter::~Classfilter(void)"
(??1Classfilter@@QAE@XZ) referenced in function __unwindfunclet$??0ClassMissing0@@QAE@PAVClassData@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@11@Z$6
CRHM_Test C:Running_v18_TeeChartAnimated-4CCCC_Testtest.obj 1

I have a file that contains destructor for Classfilter class, here is the code for the destructor:

Classfilter::~Classfilter() {



if (Vs > 0) {

    if (!Error) // will not be assigned if error

        for (int jj = 0; jj < Vs; ++jj)

            delete Data[jj];

    delete Data;

    delete DataIndx;

    delete DataObsCnt;

}

if (Cs > 0) delete Constants;

}

and here is my Classfilter class in the header file:

class __declspec(dllexport) Classfilter {

public:

Classfilter(ClassData *MyObs, string ToVar, string args, string argtypes);



~Classfilter();



ClassData *MyObs;



string ToVar;

string argtypes;

string args;



long Vs;

long Cs;

bool Error;

long ObsCnt;

long TotalCnt; // when created;

bool FirstTime;



long *DataIndx;    // Vs offsets

long *DataObsCnt;  // maximum number of observations

float ***Data;     // Data[Vs selection][Obs][line]

double *Constants; // constant data



ClassVar *thisVar; // last arg accessed

ClassVar *outVar; // ToVar



void Classfilter::readargs();

void error(string Mess);

void fixup(void);

void doFunc(long Obs, long Line) { Data[0][Obs][Line] = 0.0; }

void doFunctions(long Line);

};

I don't understand what is wrong with this class. Please let me know if you have any idea.

My issue is solved by moving body of the method to the header file.
So my header file looks like this:

class __declspec(dllexport) Classfilter {

public:

Classfilter(ClassData *MyObs, string ToVar, string args, string argtypes);



{



if (Vs > 0) {

if (!Error) // will not be assigned if error

    for (int jj = 0; jj < Vs; ++jj)

        delete Data[jj];

delete Data;

delete DataIndx;

delete DataObsCnt;

}

if (Cs > 0) delete Constants;

}



ClassData *MyObs;



string ToVar;

string argtypes;

string args;



long Vs;

long Cs;

bool Error;

long ObsCnt;

long TotalCnt; // when created;

bool FirstTime;



long *DataIndx;    // Vs offsets

long *DataObsCnt;  // maximum number of observations

float ***Data;     // Data[Vs selection][Obs][line]

double *Constants; // constant data



ClassVar *thisVar; // last arg accessed

ClassVar *outVar; // ToVar



void Classfilter::readargs();

void error(string Mess);

void fixup(void);

void doFunc(long Obs, long Line) { Data[0][Obs][Line] = 0.0; }

void doFunctions(long Line);

};