Function extern_spec_Add__ref_u64_u64_add 

pub fn extern_spec_Add__ref_u64_u64_add(self_: u64, rhs: &u64) -> u64

extern spec for u64::add

This is not a real function: its only use is for documentation.

requires

$type::MIN@ <= self@ $op rhs@ && self@ $op rhs@ <= $type::MAX@

ensures

result@ == self@ $op rhs@