C++Builder About noexcept & throw[JAPAN]

"noexcept" has been added since C++11. The "throw" attached to the method from C++1z(17) may be an error.

////
void func() throw() {} //C++17 Error

void func() {} //C++17 OK

It is possible to add "noexcept" to a method from C++11.

////
void func() noexcept(false)
{
	throw std::runtime_error("error");
}

//Exception handling is ignored if it is below.
void func() noexcept //noexcept(true)
{
	throw std::runtime_error("error");
}

The following is how to use in the internal method.

////
void __fastcall TForm1::Button2Click(TObject *Sender)
{
	int i = noexcept(StrToInt("A")); //There is also this usage.
	Memo1->Lines->Append((String)i);
}

////
void __fastcall TForm1::Button2Click(TObject *Sender)
{
	TComponent* c1;// = new TComponent(this);
	int i = noexcept((int)c1->Tag); //It does not cause an error.
    Memo1->Lines->Append(static_cast＜String＞(i));
}

Considering the future, it is better not to use "throw" after the method.

It's because of the transition to "C++1z".