About "any type" in C++11[JAPAN]

About "any type" in C++11[JAPAN]

C++1z(C++17) expects "std::any" to be prepared.

C++Builder(C++11) can use boost. Its version is 1_55.

////
#define BOOST_VERSION 105500
#define BOOST_LIB_VERSION "1_55"

"boost::any" can be used. 

////
#include ＜boost/any.hpp＞;

////

void __fastcall TForm1::Button1Click(TObject *Sender)
{
	//value of the float
	boost::any button_and_float = BOOST_VERSION + 0.0001;

	//Place TButton in the same variable.
	//But, it does not go out error.
	button_and_float = new TButton(this);
    //This can be used if the cast. It can be used as Button.
	auto button2 = boost::any_cast＜TButton* ＞(button_and_float);
	button2->Parent = this;
	button2->Top    = 200;
	button2->Left	= 200;
	button2->Width	= 200;
	button2->Name   	= "Button2";
	button2->Caption	= "Any Button2";
}

In this way, you can use it.

//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
	//value of the float
	boost::any button_and_float = BOOST_VERSION + 0.0001;
	boost::any event_ 	= static_cast＜void*＞([](TObject* Sender){ShowMessage("event");});
	TMethod method_;
	method_.Data        = nullptr;
	method_.Code        = boost::any_cast＜void* ＞(event_);

	//Place TButton in the same variable.
	//But, it does not go out error.
	button_and_float = new TButton(this);
	//This can be used if the cast. It can be used as Button.
	auto button2 = boost::any_cast＜TButton* ＞(button_and_float);
	button2->Parent = this;
	button2->Top    = 200;
	button2->Left	= 200;
	button2->Width	= 200;
	button2->Name   	= "Button2";
	button2->Caption	= "Any Button2";
	button2->OnClick    = reinterpret_cast＜TNotifyEvent&＞(method_);
}