userfull / luawrapper

a wrapper for lua api,writting by c++

###C++对lua访问接口的封装,提供访问lua函数，向lua暴露普通C函数，向lua注册C++类型，对lua对象和表的封装等等.

####[向lua注册函数]

static int showmsg(const char *msg)
{
	printf("c-showmsg:%s\n",msg);
	return 0;
}

luacpp::reg_cfun(L,"cshow",showmsg);

####[调用lua函数]

luacpp::call<void>(L,"test1");

####[注册c++类型]

--C++ code

class test_class_A
{
public:
	test_class_A():memb_a(0)
	{
		printf("test_class_A void\n");
	}
	test_class_A(const test_class_A &other):memb_a(other.memb_a)
	{
		printf("test_class_A con %d \n",memb_a);
	}		
	~test_class_A()
	{
		printf("~test_class_A\n");
	}
	int  memb_a;
	void show()
	{
		printf("test_class_A::show\n");
	}
};

luacpp::reg_cclass<test_class_A>::_reg(L,"test_class_A")
	.constructor<void>()//无参构造
	.constructor<const test_class_A&>()//一个参数构造
	.property("memb_a",&test_class_A::memb_a)
	.function("show",&test_class_A::show);

--lua code

function test12(obj)
	local t1 = test_class_A()
	t1.memb_a = 100
	local t2 = test_class_A(t1)
	print(t2.memb_a)
	t2:show()		
end

####[获取lua全局变量]

luatable lt = luacpp::Get<luatable>(L,"t_table");

####[设置lua全局变量]

luacpp::Set(L,"TEST_GLOBAL","this is test global");

####[访问lua中的Object]

--lua code
Account = {
	balance = 10,
	names=0,
	[1] = 1,
	[2.2] = 2.2,
}
    
function Account:withdraw (v)
      self.balance = self.balance - v
end
    
function Account:new (o)
  o = o or {}   
  setmetatable(o, self)
  self.__index = self
  return o
end

function Account:show()
	print("this is account show")
end

function Account:getBalance()
	return self.balance
end

function Account:setBalance(val)
	self.balance = val
end

function GetAccount()
	return Account:new()
end


--C++ code
luaObject lo = luacpp::call<luaObject>(L,"GetAccount");
lo.call<void>("show");
printf("balance:%d\n",lo.Get<int>("balance"));
lo.Set("balance",1000);
printf("balance:%d\n",lo.Get<int>("balance"));
printf("1:%d\n",lo.Get<int>(1));
printf("2:%f\n",lo.Get<double>(2.2));

###[访问数组形式的lua表]

####[从lua返回]

--lua code 
function get_lua_array()
	return {"a","b","c","d","e","f"}
end


--C++ code

luatable lt = luacpp::call<luatable>(L,"get_lua_array");
for(int i = 0 ;i < (int)lt.size(); ++i)
	printf("%s\n",any_cast<std::string>(lt[i]).c_str());

####[传递到lua] --C++ code

luatable lt;
lt.push_back(1);
lt.push_back(2);
lt.push_back(3);
luacpp::call<void>(L,"pass_luatable",lt);


--lua code 
function pass_luatable(lt)
	print(lt[1])
	print(lt[2])
	print(lt[3])
end