(VariantCopy) does VARIANT have default-copy function, or do i have to write copy-function & overider operator =

Question

VARIANT copy problem, for multi-threads

does VARIANT have default-copy function, or do i have to write copy-function & overider operator =

https://learn.microsoft.com/en-us/windows/desktop/winauto/variant-structure

https://learn.microsoft.com/en-us/windows/desktop/api/oaidl/ns-oaidl-tagvariant

Answer 1

is this ok?

class Data() 
{
protected:
  VARIANT m_var;
public:
  Data()
  {
    VariantInit(&m_var);
  }
  ~Data()
  {
    VariantClear(&m_var);
  }

  Data(const Data& other)
  {
    VariantInit(&m_var);
    VariantCopy(&m_var, &other.m_var);
  }
  Data& operator = (const Data& other)
  {
    if(this == &other)
        return *this;
    VariantInit(&m_var);
    VariantCopy(&m_var, &other.m_var);
    return *this;
  }

  Data(Data&& other)
  {
    VariantInit(&m_var);
    VariantCopy(&m_var, &other.m_var);
    VariantClear(&other.m_var);
  }
  Data& operator = (Data&& d)
  {
    if(this == &other)
        return *this;
    VariantInit(&m_var);
    VariantCopy(&m_var, &other.m_var);
    VariantClear(&other.m_var);
    return *this;
  }
}