Mex-file using a vector class definition

I am trying to create a Mex-file from a C++ code source file to use it with Matlab. I have compiling errors due to the vector class definition handling that I do not understand very well. I would like to know how I should modify the code to work. Below I show the relevant code's parts that I have divided into four sections for clarifying more (Computational code, MexFunction code, Vector class definition and compiling errors):

+ Computational routine's code:

    `#include "mex.h"`

    `#include "SAT_VecMat.h"`

     void AccelSolrad (const Vector& r, const Vector& r_Sun, double Area,
    double mass,double CR, double P0, double AU,const Vector& Accel )

+ mexFunction's code:

       ...

                const Vector& r_sat(3);  % dummy argument name for r
                const Vector& r_sol(3);  % dummy argument name for r_Sun      
                const Vector& outMatrix(3);   % dummy argument name for Accel
        ...

        r_sat = mxGetPr(prhs[0]);

        r_sol = mxGetPr(prhs[1]);

        plhs[0] = mxCreateDoubleMatrix(1,3,mxREAL);

        outMatrix = mxGetPr(plhs[0]);

+ Vector class definition included in SAT_VecMat.h:

     class Vector
        {

          public:

            friend class Matrix;

            // Constructors

            Vector ();                              // Vector without elements

            Vector (int Size);                      // Nullvector of specified size 

            Vector (const Vector& V);               // Vector copy

            Vector (const double* p, int N);        // Array copy

            Vector (double x, double y, double z);  // 3dim-Vector

            Vector (double x, double y, double z,   // 6dim-Vector

                    double X, double Y, double Z);  

            // Destructor

            ~Vector();

            // Size

            int size() const { return n; };

            Vector& resize(int Size);

            // Assignment

            Vector& operator=(const double value);

            Vector& operator=(const Vector& V);

            // Component access (Fortran notation)

            double  operator () (int i) const { return v[i]; };

            double& operator () (int i)       { return v[i]; };

            Vector slice (int first, int last) const;
        ...

+ Compiling errors:

      >> mex AccelSolrad.cpp

      AccelSolrad.cpp 

      c:\program files\matlab\r2009b\extern\include\matrix.h(332) : error C2371: 'char16_t' : redefinition; different basic types

      C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\yvals.h(576) : see declaration of 'char16_t'

AccelSolrad.cpp(14) : error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Vector' (or there is no acceptable conversion) d:\po\ejemplos\SAT_VecMat.h(69): could be 'Vector &Vector::operator =(const double)' d:\po\ejemplos\SAT_VecMat.h(70): or 'Vector &Vector::operator =(const Vector &)' while trying to match the argument list '(const Vector, Vector)'

AccelSolrad.cpp(18) : error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Vector' (or there is no acceptable conversion) d:\po\ejemplos\SAT_VecMat.h(69): could be 'Vector &Vector::operator =(const double)' d:\po\ejemplos\SAT_VecMat.h(70): or 'Vector &Vector::operator =(const Vector &)' while trying to match the argument list '(const Vector, Vector)'

AccelSolrad.cpp(94) : error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Vector' (or there is no acceptable conversion) d:\po\ejemplos\SAT_VecMat.h(69): could be 'Vector &Vector::operator =(const double)' d:\po\ejemplos\SAT_VecMat.h(70): or 'Vector &Vector::operator =(const Vector &)' while trying to match the argument list '(const Vector, double *)'

AccelSolrad.cpp(96) : error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Vector' (or there is no acceptable conversion) d:\po\ejemplos\SAT_VecMat.h(69): could be 'Vector &Vector::operator =(const double)' d:\po\ejemplos\SAT_VecMat.h(70): or 'Vector &Vector::operator =(const Vector &)' while trying to match the argument list '(const Vector, double *)'

AccelSolrad.cpp(112) : error C2678: binary '=' : no operator found which takes a left-hand operand of type 'const Vector' (or there is no acceptable conversion) d:\po\ejemplos\SAT_VecMat.h(69): could be 'Vector &Vector::operator =(const double)' d:\po\ejemplos\SAT_VecMat.h(70): or 'Vector &Vector::operator =(const Vector &)' while trying to match the argument list '(const Vector, double *)'

C:\PROGRA~1\MATLAB\R2009B\BIN\MEX.PL: Error: Compile of 'AccelSolrad.cpp' failed.

Answer 1

[Kaustubha Govind]

It looks like char16_t has two different definitions in matrix.h (included with MATLAB) and yvals.h (MSVC header), and is causing a conflict. There is a similar discussion here: http://www.mathworks.com/matlabcentral/newsreader/view_thread/281754

The solution using a namespace around matrix.h should be a good way to resolve the issue.

Regarding the rest of your errors, it has to do with your use of Vector object(s) - I'm not sure what code you have at lines 14, 18, 94, 96 and 112, but it looks like you are trying to assign to a const Vector - try discarding the const qualifier for all relevant Vectors.