Function extern_spec_i64_unchecked_add 

pub unsafe fn extern_spec_i64_unchecked_add(self_: i64, rhs: i64) -> i64

extern spec for i64::unchecked_add

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

terminates

ghost

requires

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

ensures

result@ == self@ $op rhs@