Fix flags enum completion

[controlflow]

When enum case takes >1 bit, should emit

(value & Enum.Case) == Enum.Case

[hazzik]

What is the snippet?

[controlflow]

To be clear, if you have enum like this:

[Flags]
enum E {
  A = 1 << 0,
  B = 1 << 1,
  C = 1 << 2,
  BC = B | C
}

When you complete BC fake member over value of type E, you will get:

void M(E e) {
  if ((e & E.BC) != 0) { }
}

This is wrong :) Right way was:

void M(E e) {
  if ((e & E.BC) == E.BC) { }
}

[thinkingmedia]

:+1:

[controlflow]

Fixed in upcoming 2.2