c++ - What does *New() mean when declaring member function? -

i'm working on vtk program , have found class (specifically one: image region) need incorporate code. have made separate imageregion.h , imageregion.cpp files can included in project. problem here

static vtkbordercallback *new()

function not know how implement in .cpp file or, quite honest, purpose serves @ all. do? necessary have it?

when compiling error:

/home/desktop/test/src/imageregion.cpp:7:10: error: ‘vtkbordercallback::vtkbordercallback’ names constructor, not type

my .h file:

//imageregion.h #pragma once  #include <vtksmartpointer.h> #include <vtkactor.h> #include <vtkassemblynode.h> #include <vtkassemblypath.h> #include <vtkborderrepresentation.h> #include <vtkcommand.h> #include <vtkcoordinate.h> #include <vtkimagemapper3d.h> #include <vtkimageactor.h> #include <vtkinteractorstyleimage.h> #include <vtkpolydata.h> #include <vtkproppicker.h> #include <vtkproperty2d.h> #include <vtkborderwidget.h> #include <vtkrenderwindow.h> #include <vtkrenderwindowinteractor.h> #include <vtkrenderer.h>  class vtkbordercallback : public vtkcommand { public:   vtkbordercallback();   static vtkbordercallback *new();   virtual void execute(vtkobject *caller, unsigned long, void*);   void setrenderer(vtksmartpointer<vtkrenderer> ren);   void setimageactor(vtksmartpointer<vtkimageactor> im);   double coords[6];    private:   vtksmartpointer<vtkrenderer> renderer;   vtksmartpointer<vtkimageactor> imageactor;  }; 

and .cpp file:

//imageregion.cpp #include "imageregion.h"     vtkbordercallback::vtkbordercallback(){}     static vtkbordercallback::vtkbordercallback* new()        {     return new vtkbordercallback;     }    void vtkbordercallback::execute(vtkobject *caller, unsigned long, void*)     {       //do stuff, original vtk example code     }    void vtkbordercallback::setrenderer(vtksmartpointer<vtkrenderer> ren) {this->renderer = ren;}   void vtkbordercallback::setimageactor(vtksmartpointer<vtkimageactor> im) {this->imageactor = im;} 

any appreciated.

this

static vtkbordercallback *new(); 

is static member function called new, taking no arguments, , returning pointer vtkbordercallback.

in implementation, should omit static. need place function in scope of class:

vtkbordercallback*  vtkbordercallback::new() {//                 ^^^^^^^^^^^^^^^^^^^   return new vtkbordercallback; // danger! caller needs delete }