Support default parameters about kaguya HOT 15 CLOSED

struct Foo {
    void func(int param = 42) { std::cout << param<<std::endl; }
};
state["Foo"].setClass(kaguya::ClassMetatable<Foo>()
    .addMemberFunction("func", &Foo::func)
    .addStaticFunction("func", [](Foo& self) {self.func(); })
);
state["foo"] = Foo();
state("foo:func()");//42
state("foo:func(1)");//1
);

/**
* @name KAGUYA_FUNCTION_OVERLOADS
* @brief Generate wrapper function object for count based overloads. Include default arguments parameter function
* @param GENERATE_NAME generate function object name
* @param FNAME target function name
* @param MINARG minimum arguments count
* @param MAXARG maximum arguments count
*/
#define KAGUYA_FUNCTION_OVERLOADS(GENERATE_NAME,FNAME, MINARG, MAXARG) KAGUYA_FUNCTION_OVERLOADS_INTERNAL(GENERATE_NAME,FNAME, MINARG, MAXARG)

/**
* @name KAGUYA_FUNCTION_OVERLOADS
* @brief Generate wrapper function object for count based overloads. Include default arguments parameter function
* @param GENERATE_NAME generate function object name
* @param CLASS target class name
* @param FNAME target function name
* @param MINARG minimum arguments count
* @param MAXARG maximum arguments count
*/
#define KAGUYA_MEMBER_FUNCTION_OVERLOADS(GENERATE_NAME,CLASS,FNAME, MINARG, MAXARG) KAGUYA_MEMBER_FUNCTION_OVERLOADS_INTERNAL(GENERATE_NAME,CLASS,FNAME, MINARG, MAXARG)

//free function
int defargfn(int a = 3, int b = 2, int c = 1)
{
    return a*b*c;
}

KAGUYA_FUNCTION_OVERLOADS(defargfn_wrapper, defargfn,0,3)
state["defarg"] = kaguya::function(defargfn_wrapper);
state.dostring("assert(defarg() == 6)");
state.dostring("assert(defarg(6) == 12)");
state.dostring("assert(defarg(6,5) == 30)");
state.dostring("assert(defarg(2,2,2) == 8)");

//member function
struct TestClass
{
  int defargfn(int a = 3, int b = 2, int c = 1)
  {
      return a*b*c;
  }
}
KAGUYA_MEMBER_FUNCTION_OVERLOADS(defargfn_wrapper, TestClass, default_arg, 0, 3)
state["TestClass"].setClass(kaguya::UserdataMetatable<TestClass>()
  .setConstructors<TestClass()>()
  .addFunction("defarg", defargfn_wrapper)
);
    state.dostring("test = TestClass.new()");
    state.dostring("assert(test:defargfn() == 6)");
    state.dostring("assert(test:defargfn(6) == 12)");
    state.dostring("assert(test:defargfn(6,5) == 30)");
    state.dostring("assert(test:defargfn(2,2,2) == 8)");