I agree, enum variable should only contain one of the
enumerated values. Here's an example how current way may lead
to unexpected result:
enum Foo { A = 1, B }
void bar( Foo foo ) {
final switch( foo ) {
case Foo.A:
writeln( "A" );
return;
case Foo.B:
writeln( "B" );
return;
}
writeln( "Unreachable branch" );
}
int main() {
bar( Foo.A | Foo.B );
return 0;
}
It is intuitive to assume that the final switch will always hit
one of it's branches, yet this doesn't work here.
Valid example.
As I said one could introduce something like @flags but I guess a
library solution is preferred.
I still wonder though if implicit conversion to the basetype has
any merit.
