C++ value type styles

Get, Set, m_.cpp

class Size
{
  int m_width;
  int m_height;
  
public:
  Size(int width, int height)
    : m_width(width)
    , m_height(height)
  {}
  
  int GetWidth() const { return m_width; }
  int GetHeight() const { return m_height; }
  void SetWidth(int width) { m_width = width; }
  void SetHeight(int height) { return m_height = height; }
};

plain field and method names.cpp

class Size
{
  int width;
  int height;
  
public:
  Size(int width, int height)
    : width(width)
    , height(height)
  {}
  
  int Width() const { return this->width; }
  int Height() const { return this->height; }
  void SetWidth(int width) { this->width = width;}
  void SetHeight(int height) { this->height = height;}
};

struct.cpp

struct Size
{
  int width;
  int height;
};

The struct.

I am not a fan of empty properties. Anders and I talked about this in the early days of C#, and he was of the same opinion, so I started to suggest that to people that maybe that made more sense than writing properties.

And then I stopped doing it because people kept looking at me as if I had grown an extra arm.

It wasn't helped by all the BCL features that supported properties but not fields.

My only exception is if I am shipping a library and I'm going to need binary compatibility when I version it, but I don't think that applies to to value types.