Feature request: -Weffc++

[dtrussel]

I often use the GCC option -Weffc++ in my projects which:

Warn about violations of the following style guidelines from Scott Meyers’ Effective C++ series of books:

• Define a copy constructor and an assignment operator for classes with dynamically-allocated memory.
• Prefer initialization to assignment in constructors.
• Have operator= return a reference to *this.
• Don’t try to return a reference when you must return an object.
• Distinguish between prefix and postfix forms of increment and decrement operators.
• Never overload &&, ||, or ,.
  This option also enables -Wnon-virtual-dtor, which is also one of the effective C++ recommendations. However, the check is extended to warn about the lack of virtual destructor in accessible non-polymorphic bases classes too.
  `

But unfortunately CLI11 throws a couple of warnings when this is enabled. I think it would be a nice-to-have to enable -Weffc++ and get rid of those warnings