# C++ data structure

```c++
struct Vector3d
{
	double x, y, z;
};

struct BigData
{
	int n;

	int *iarr;
	double *darr;
	Vector3d *varr;
};
```

# SWIG interface
```swig
%module hoge

%include "carrays.i"

%include "std_vector.i"
%include "std_string.i"

%{
#include "hoge.h"
%}

%array_class(int, IntArray)
%array_class(double, DoubleArray)
// %array_functions(Vector3d, Vector3dArray)
%array_class(Vector3d, Vector3dArray)

// grab the whole header
%include "hoge.h"
```

# Lua access
```lua
data_iarr = hoge.IntArray_frompointer(data.iarr)
data_darr = hoge.DoubleArray_frompointer(data.darr)
data_varr = hoge.Vector3dArray_frompointer(data.varr)
```