[C++] relax, it's just fun :-)

This thread is fun :-)
What was your latest discovery about C++?
From my point of view, the discoveries can be categorized into 3 parts:

• C
  e.g Duff's Device/Clifford's Device
• template
• syntax trick
  e.g see below

Valid C++ code supports embedded URL in source code:

void fn()
{
https://www.google.com
cout << "Look no error!\n";
}