Function extern_spec_i64_saturating_sub 

pub fn extern_spec_i64_saturating_sub(self_: i64, rhs: i64) -> i64

extern spec for i64::saturating_sub

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

terminates

ghost

ensures

(self@ $op rhs@) >= $type::MIN@ && (self@ $op rhs@) <= $type::MAX@
                    ==> result@ == (self@ $op rhs@)

ensures

(self@ $op rhs@) < $type::MIN@ ==> result@ == $type::MIN@

ensures

(self@ $op rhs@) > $type::MAX@ ==> result@ == $type::MAX@