typedef enum { A, B } E;

int main()
{
E e = A;
e |= B;
return 0;
}

g++ complains with:
test.cpp:6: error: invalid conversion from 'int' to 'E'

My question is, how do I do in C++ what C would do here?
The definition of E cannot be changed.
Any solution that works with g++ is fine, including compile flags.

Hector

Andrey Tarasevich wrote:

...
From the pedantic point of view, it is impossible in general case. In
C++ the underlying type of the enum can be arbitrarily small. It is
basically guaranteed to only have enough range to store all values in
the enum-constant list and value 0 (see 7.2. for the precise
definition). This means that an attempt to force an 'A | B' value into
an object of type 'E' can result in undefined behavior simply because it
doesn't fit into the range.
...

On the second thought, I'm wrong here. The precise definition given in
7.2 actually ensures that 'A | B' will fit into the range. 'A + B' might
not.

--
Best regards,
Andrey Tarasevich