Function extern_spec_Add_i64_i64_add 

pub fn extern_spec_Add_i64_i64_add(self_: i64, rhs: i64) -> i64

extern spec for i64::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@