Inheriting C++ base class constructor

foo.cc

// Provides a mechanism to `inherit` a base class constructor
// verbatim (i.e., with the exact same parameter list) in a subclass.
//
// Note that in C++11 and onwards there's a better way to do it:
// See https://stackoverflow.com/questions/8093882/using-c-base-class-constructors

class Foo {
 public:
#define FOO_CTOR(name, body, ...) \
  explicit name(int x, int y) \
    : __VA_ARGS__ \
  body

FOO_CTOR(Foo, {}, x_(x), y_(y))

#define INHERIT_FOO_CTOR(name) \
  FOO_CTOR(name, {}, Foo(x, y))

 private:
  int x_, y_;
};

class Bar: public Foo {
 public:
INHERIT_FOO_CTOR(Bar)

  Bar *mkBar() {
    return new Bar(1, 2);
  }
};