What is the meaning of ::~ [closed]

Question

In the following piece of code, what is the meaning of ::~

GaussianMex::~GaussianMex()
{
   int i;
}

Answer 1

This is not a single operator ::~, but a definition of GaussianMex destructor. You define class methods by ClassName::ClassMethod syntax and since destructor name is ~ClassName resulting destructor definition is ClassName::~ClassName.