14.9.4 Boolean equality operators

The predefined boolean equality operators are:
bool operator ==(bool x, bool y);
bool operator !=(bool x, bool y);
The result of == is true if both x and y are true or if both x and y are
false. Otherwise, the result is
false.
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The result of != is false if both x and y are true or if both x and y are
false. Otherwise, the result is
true. When the operands are of type bool, the != operator produces the same
result as the ^ operator.