Function extern_spec_Sub_u8_u8_sub 

pub fn extern_spec_Sub_u8_u8_sub(self_: u8, rhs: u8) -> u8

extern spec for u8::sub

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@