operator groups left-to-right.
The operands shall be of integral or unscoped enumeration type.
Given the coefficients xi
of the base-2 representation ([basic.fundamental]
of the converted operands x
the coefficient ri
of the base-2 representation of the result r
is 1 if at least one of xi
is 1, and 0 otherwise.
The result is the bitwise inclusive or
function of the operands.
— end note