返回NULL值

namespace dx11 {
...
class FramebufferManager : public FramebufferManagerBase
{
public:
   ...
private:
   ...
   static struct Efb
   {
      ...
      std::unique_ptr<D3DTexture2D> resolved_color_tex;
      std::unique_ptr<D3DTexture2D> resolved_depth_tex;
   } m_efb;
};
} //namespace

namespace DX11
{
...
FramebufferManager::Efb FramebufferManager::m_efb;
...
FramebufferManager::FramebufferManager()
{
   ...
   m_efb.resolved_color_tex = NULL;
   m_efb.resolved_depth_tex = NULL;
}
} //namespace

m_efb.resolved_color_tex = 0;
m_efb.resolved_color_tex = NULL;
m_efb.resolved_color_tex = nullptr;

0

NULL

nullptr_t

unique_ptr

nullptr_t

nullptr

NULL

reset()

m_efb.resolved_color_tex.reset(NULL);

m_efb.resolved_color_tex.reset(); 

operator=

FramebufferManager::FramebufferManager() :
   resolved_color_tex(NULL), resolved_depth_tex(NULL)
{
   ...
}

resolved_color_tex()