Squirrel

Is there an example of using C++ operators with sqplus?  I tried func(&Test::operator+=, "add") but that didn't work.

Thanks!
--graham

struct Vector3 {
  float x,y,z;
  Vector3() {
    x = 1.f;
    y = 2.f;
    z = 3.f;
  }
  Vector3(float _x,float _y,float _z) : x(_x), y(_y), z(_z) {}
  Vector3 operator+(Vector3 & v) {
    return Vector3(x+v.x,y+v.y,z+v.z);
  }
};

SQClassDef<Vector3>(_T("Vector3")).
  var(&Vector3::x,_T("x")).
  var(&Vector3::y,_T("y")).
  var(&Vector3::z,_T("z")).
  func(&Vector3::operator+,_T("_add"));



This allows + and += to work in script for Vector3. If using constant args, define SQPLUS_CONST_OPT before including SqPlus.h.

See the Squirrel reference manual for other metamethods (all start with underscore).

Thanks.  I'm sure I'll have more questions later...

Actually, if I follow your example (or something similar) and I try to create a new Vector (in Squirrel) eg:

local xxx = Vector3(1.0, 2.0, 3.0);

I get a runtime error saying wrong number of arguments.

Do I have to do something else to get it to recognise my constructor with multiple args?  What is the simplest way of achieving this?

Thanks!

macdonag wrote:

Actually, if I follow your example (or something similar) and I try to create a new Vector (in Squirrel) eg: local xxx = Vector3(1.0, 2.0, 3.0); I get a runtime error saying wrong number of arguments. Do I have to do something else to get it to recognise my constructor with multiple args?  What is the simplest way of achieving this? Thanks!

Yes: see the examples in testSqPlus2.cpp for custom constructor/variable args.

Thanks.