A sign in C++ I've never seen before: |=

Question

I have some code here:

case MONITORTYPE_WUXGA_SXGA_WXGA:
    bResult |= (var == enum1);
    bResult |= (var == enum2);

Now i know what its doin

Answer 1

It's equivalent to:

bResult = bResult | (var == enum1);

Just like a += b means a = a + b, a |= b means a = a | b.