Today, we write in a header

typedef uint64_t Foo;
static const Foo Foo_A = 0x1;

and invoke bindgen with --new-type-alias Foo, we'll get:

#[repr(transparent)]
#[derive(Debug, Default, Copy, Clone, PartialEq)]
pub struct Foo(pub u64);
pub const  Foo_A: Foo = 1;

which won't compile. If we've decided to apply newtype to an alias, we should wrap constants in the appropriate constructor to make it work.