Function extern_spec_usize_unchecked_sub 

pub unsafe fn extern_spec_usize_unchecked_sub(self_: usize, rhs: usize) -> usize

extern spec for usize::unchecked_sub

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@