A little test to try to figure out a way to deal with C++ classes using the new C++ support in CGo.

test.cpp

#include <iostream>

#include "test.h"

class Test
{
	protected:
		const char *str;

	public:
		Test(const char *);
		~Test();

		void print();
};

Test::Test(const char *str)
{
	this->str = str;
}

Test::~Test()
{
	delete[] this->str;
}

void Test::print()
{
	std::cout << this->str << std::endl;
}

void *NewTest(const char *str)
{
	return new Test(str);
}

void Test_delete(void *t)
{
	delete (Test *)t;
}

void Test_print(void *t)
{
	((Test *)t)->print();
}

test.go

package main

// #cgo LDFLAGS: -lstdc++
//
// #include "test.h"
import "C"

import (
	"runtime"
	"unsafe"
)

type Test struct {
	c unsafe.Pointer
}

func NewTest(str string) *Test {
	t := &Test{C.NewTest(C.CString(str))}
	runtime.SetFinalizer(t, (*Test).free)

	return t
}

func (t *Test) free() {
	C.Test_delete(t.c)
}

func (t *Test) Print() {
	C.Test_print(t.c)
}

func main() {
	t := NewTest("This is a test.")
	t.Print()
}

test.h

#ifndef TEST_H
#define TEST_H

#ifdef __cplusplus
extern "C"
{
#endif

void *NewTest(const char *);
void Test_delete(void *);
void Test_print(void *);

#ifdef __cplusplus
}
#endif

#endif